Add picoChip port.

2008-09-03  Hari Sandanagobalane  <hariharan@picochip.com>

	Add picoChip port.
	* MAINTAINERS: Add picoChip maintainers.
	libgcc/
	* config.host: Add picochip-*-*.
	gcc/
	* doc/extend.texi: Document picoChip builtin functions.
	* doc/invoke.texi: Document picoChip options.
	* doc/contrib.texi: Add picoChip contribution.
	* doc/md.texi: Document picoChip constraints.
	* config.gcc: Add picochip-*-*.
	* config/picochip/: Add new port.

From-SVN: r139932

ChangeLog

@@ -1,3 +1,8 @@
+2008-09-03  Hari Sandanagobalane  <hariharan@picochip.com>
+
+	Add picoChip port.
+	* MAINTAINERS: Add picoChip maintainers.
+
 2008-09-02  Sebastian Pop  <sebastian.pop@amd.com>
 	    Tobias Grosser  <grosser@fim.uni-passau.de>
 	    Jan Sjodin  <jan.sjodin@amd.com>

MAINTAINERS

@@ -69,6 +69,8 @@ mmix port		Hans-Peter Nilsson	hp@bitrange.com
 mn10300 port		Jeff Law		law@redhat.com
 mn10300 port		Alexandre Oliva		aoliva@redhat.com
 pdp11 port		Paul Koning		ni1d@arrl.net
+picochip port		Hari Sandanagobalane	hariharan@picochip.com
+picochip port		Daniel Towner		dant@picochip.com
 rs6000 port		Geoff Keating		geoffk@geoffk.org
 rs6000 port		David Edelsohn		edelsohn@gnu.org
 rs6000 vector extns	Aldy Hernandez		aldyh@redhat.com

config/picochip/constraints.md

@@ -0,0 +1,68 @@
+;; GCC machine description for picochip
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;; Contributed by picoChip Designs Ltd (http://www.picochip.com)
+;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan
+;; Sandanagobalane (hariharan@picochip.com)
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not, see
+;; <http://www.gnu.org/licenses/>.
+
+(define_constraint "I"
+ "4-bits signed value"
+ (and (match_code "const_int")
+      (match_test " ival >= -8 && ival< 8")))
+
+(define_constraint "J"
+ "4-bits unsigned value"
+ (and (match_code "const_int")
+      (match_test "ival>=0 && ival < 16")))
+
+(define_constraint "K"
+ "8-bits signed value"
+ (and (match_code "const_int")
+      (match_test " ival >= -128 && ival < 128")))
+
+(define_constraint "M"
+ "4-bits magnitude"
+ (and (match_code "const_int")
+      (match_test " abs(ival) < 16")))
+
+(define_constraint "N"
+ "10-bits signed value"
+ (and (match_code "const_int")
+      (match_test "ival >= -512 && ival < 512")))
+
+(define_constraint "O"
+ "16-bits signed value"
+ (and (match_code "const_int")
+      (match_test " ival >= -32768 && ival < 32768 ")))
+
+(define_constraint "a"
+ "See if this is an absolute address in memory"
+  (and (match_code "mem")
+       (match_test "picochip_absolute_memory_operand(op,mode) == 1")))
+
+(define_constraint "b"
+ "See if this is an address in memory, non-strict version"
+  (match_test "picochip_legitimate_address_p(mode,op,0) == 1"))
+
+(define_register_constraint "k" "FRAME_REGS"
+  "Frame regs")
+(define_register_constraint "f" "PTR_REGS"
+  "Pointer regs")
+(define_register_constraint "t" "TWIN_REGS"
+  "Twin regs")
+

config/picochip/dfa_space.md

@@ -0,0 +1,43 @@
+;; GCC machine description for picochip
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;; Contributed by picoChip Designs Ltd (http://www.picochip.com)
+;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan
+;; Sandanagobalane (hariharan@picochip.com)
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not, see
+;; <http://www.gnu.org/licenses/>.
+
+;; The following DFA description schedules instructions for space.  The
+;; schedule seeks to avoid stall cycles (e.g., memory load), but the
+;; instructions are not VLIW packed (whenever instructions are packed
+;; together, an additional byte is used to denote this, which
+;; increases the code size).
+
+;; No special handling of the long constants is necessary (as in
+;; dfa_speed.md), since VLIW packing is not used.
+
+;; Memory instructions stall for one cycle.  All other instructions
+;; complete ready for the next cycle.
+
+(define_insn_reservation "nonStallInsn" 1
+  (and (eq_attr "schedType" "space")
+       (eq_attr "type" "!mem"))
+  "slot0+slot1+slot2")
+
+(define_insn_reservation "stallInsn" 2
+  (and (eq_attr "schedType" "space")
+       (eq_attr "type" "mem"))
+  "slot0+slot1+slot2")

config/picochip/dfa_speed.md

@@ -0,0 +1,123 @@
+;; GCC machine description for picochip
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;; Contributed by picoChip Designs Ltd (http://www.picochip.com)
+;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan
+;; Sandanagobalane (hariharan@picochip.com).
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not, see
+;; <http://www.gnu.org/licenses/>.
+
+;; The following DFA description schedules instructions for speed.  In
+;; addition to the scheduling of instructions to remove stall cycles
+;; (e.g., memory load), the scheduler will also pack multiple
+;; instructions into a single cycle, using VLIW.
+
+;; Each instruction comes in forms with and without long
+;; constants.  The long constant is treated as though it were also an
+;; instruction.  Thus, an instruction which used slot0, will use slot0
+;; plus one of the other slots for the constant.  This mechanism
+;; ensures that it is impossible for 3 instructions to be issued, if
+;; one of them has a long constant.  This is necessary, because the
+;; encoding of 3 instructions, plus a constant, will overrun the
+;; 64-bit limit.
+
+; Extended ALU - Slot 0
+(define_insn_reservation "picoAluInsn" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "picoAlu") (eq_attr "longConstant" "false")))
+  "slot0")
+(define_insn_reservation "picoAluInsnWithConst" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "picoAlu") (eq_attr "longConstant" "true")))
+  "(slot0+slot1)|(slot0+slot2)")
+
+; Basic ALU - Slot 0 or 1
+(define_insn_reservation "basicAluInsn" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "basicAlu") (eq_attr "longConstant" "false")))
+  "(slot0|slot1)")
+(define_insn_reservation "basicAluInsnWithConst" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "basicAlu") (eq_attr "longConstant" "true")))
+  "(slot0+slot1) | (slot1+slot2) | (slot0+slot2)")
+
+; ALU which must not set flags - Slot 1
+(define_insn_reservation "nonCcAluInsn" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "nonCcAlu") (eq_attr "longConstant" "false")))
+  "slot1")
+(define_insn_reservation "nonCcAluInsnWithConst" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "nonCcAlu") (eq_attr "longConstant" "true")))
+  "(slot1+slot0) | (slot1+slot2)")
+
+; Memory - Slot 1
+(define_insn_reservation "memInsn" 2
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "mem") (eq_attr "longConstant" "false")))
+  "slot1,nothing")
+(define_insn_reservation "memInsnWithConst" 2
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "mem") (eq_attr "longConstant" "true")))
+  "slot1+(slot0|slot2),nothing")
+
+; Multiply - Slot 2
+(define_insn_reservation "mulInsn" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "mul") (eq_attr "longConstant" "false")))
+  "slot2")
+(define_insn_reservation "mulInsnWithConst" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "mul") (eq_attr "longConstant" "true")))
+  "(slot2+slot0)|(slot2+slot1)")
+
+; MAC - Slot 2
+(define_insn_reservation "macInsn" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "mac") (eq_attr "longConstant" "false")))
+  "slot2")
+(define_insn_reservation "macInsnWithConst" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "mac") (eq_attr "longConstant" "true")))
+  "(slot2+slot0)|(slot2+slot1)")
+
+; Branch - Real branches use slot2, while macro branches use unknown
+; resources.
+(define_insn_reservation "branchInsn" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "realBranch") (eq_attr "longConstant" "false")))
+  "slot2")
+(define_insn_reservation "branchInsnWithConst" 1
+  (and (eq_attr "schedType" "speed")
+       (and (eq_attr "type" "realBranch") (eq_attr "longConstant" "true")))
+  "(slot2+slot0)|(slot2+slot1)")
+(define_insn_reservation "branchInsnMacro" 1
+  (and (eq_attr "schedType" "speed")
+       (eq_attr "type" "realBranch"))
+  "(slot0+slot1+slot2)")
+
+; Call instructions use all slots to prevent inadvertent scheduling
+; alongside instructions which set R12.
+
+(define_insn_reservation "callInsn" 1
+  (and (eq_attr "schedType" "speed") (eq_attr "type" "call"))
+  "slot0+slot1+slot2")
+
+; Communications - Slot 1
+(define_insn_reservation "commsInsn" 1
+  (and (eq_attr "schedType" "speed") (eq_attr "type" "comms"))
+  "slot1")
+

config/picochip/libgccExtras/adddi3.asm

@@ -0,0 +1,199 @@
+// picoChip ASM file
+//
+//   Support for 64-bit addition.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+
+.section .text
+
+.align 8		
+.global __adddi3
+__adddi3:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &__adddi3 = 12 bytes
+
+        // The first operand of add is completely in registers r[2-5]
+        // The second operand of sub is in stack FP(0-3)
+        // and result need to be written pointed to by the register r0.
+        // All we need to do is to load the appropriate values, add them
+        // appropriately (with add or addc ) and then store the values back.
+
+	ldw (FP)0, r1
+	stl r[7:6], (FP)-1
+	add.0 r2, r1, r6
+	ldw (FP)1, r1
+	addc.0 r3, r1, r7
+	ldl (FP)1, r[3:2]
+	stl r[7:6], (r0)0
+	addc.0 r4, r2, r6
+	addc.0 r5, r3, r7
+	stl r[7:6], (r0)1
+	jr (r12)
+=->	ldl (FP)-1, r[7:6]
+
+_picoMark_FUNCTION_END=
+
+// picoChip Function Epilogue : __adddi3
+	
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0xe	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#61# 16#64# 16#64# 16#63# 16#69# 16#33# 16#0# // Function name `_adddi3'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile

config/picochip/libgccExtras/ashlsi3.asm

@@ -0,0 +1,197 @@
+// picoChip ASM file
+// picoChip ASM file
+//
+//   Support for 32-bit arithmetic shift left.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+.section .text
+
+.global ___ashlsi3
+___ashlsi3:
+_picoMark_FUNCTION_BEGIN=
+// picoChip Function Prologue : &___ashlsi3 = 0 bytes
+
+	// if (R2 > 15) goto _L2
+	SUB.0 15,R2,r15
+	JMPLT _L2
+=->	SUB.0 16,R2,R5   // R5 := R5 - R4 (HI)
+
+	LSL.0 R1,R2,R1    // R3 := R1 << R2
+	LSL.0 R0,R2,R4    // R2 := R0 << R2
+
+	LSR.0 R0,R5,R5 // R5 := R12 >> R5 NEED TO CHECK - HARI
+	OR.0 R5,R1,R5 // R3 := R5 IOR R0 (HI)
+	SUB.0 R2,0,r15  
+	COPYNE R5,R1
+	JR (R12)	// Return to caller 
+=->	COPY.0 R4,R0
+
+_L2:
+	LSL.0 R0,R2,R1  // R3 := R0 << R2
+	JR (R12)	// Return to caller 
+=->	COPY.0 0,R0	// R2 := 0 (short constant)
+
+_picoMark_FUNCTION_END=
+
+// picoChip Function Epilogue : __ashlsi3
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#61# 16#73# 16#68# 16#6c# 16#73# 16#69# 16#33# 16#0# // Function name `_ashlsi3'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile

config/picochip/libgccExtras/ashlsi3.c

@@ -0,0 +1,87 @@
+/*
+
+picoChip GCC support for 32-bit shift left.
+
+Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+Contributed by picoChip Designs Ltd.
+Maintained by Daniel Towner (daniel.towner@picochip.com)
+
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; see the file COPYING.  If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+#ifndef PICOCHIP
+#error "Intended for compilation for PICOCHIP only."
+#endif
+
+typedef int HItype __attribute__ ((mode (HI)));
+typedef unsigned int UHItype __attribute__ ((mode (HI)));
+typedef unsigned int USItype __attribute__ ((mode (SI)));
+
+typedef struct USIstruct {
+  UHItype low, high;
+} USIstruct;
+
+typedef union USIunion {
+  USItype l;
+  USIstruct s;
+} USIunion;
+
+USItype __ashlsi3(USIunion value, HItype count) {
+  USIunion result;
+  int temp;
+
+  /* Ignore a zero count until we get into the (count < 16)
+     clause. This is slightly slower when shifting by zero, but faster
+     and smaller in all other cases (due to the better scheduling
+     opportunities available by putting the test near computational
+     instructions. */
+  /* if (count == 0) return value.l; */
+
+  if (count < 16) {
+    /* Shift low and high words by the count. */
+    result.s.low = value.s.low << count;
+    result.s.high = value.s.high << count;
+     
+    /* There is now a hole in the lower `count' bits of the high
+       word. Shift the upper `count' bits of the low word into the
+       high word. This is only required when the count is non-zero. */
+    if (count != 0) {
+      temp = 16 - count;
+      temp = value.s.low >> temp;
+      result.s.high |= temp;
+    }
+  
+  } else {
+    /* Shift the lower word of the source into the upper word of the
+       result, and zero the result's lower word. */
+    count -= 16;
+    result.s.high = value.s.low << count;
+    result.s.low = 0;
+
+  }
+
+  return result.l;
+
+}
+

config/picochip/libgccExtras/ashrsi3.asm

@@ -0,0 +1,207 @@
+// picoChip ASM file
+//
+//   Support for 32-bit arithmetic shift right.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+
+.section .text
+
+.global ___ashrsi3
+___ashrsi3:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &___ashrsi3 = 0 bytes
+
+	// if (R2 > 15) goto _L2
+	SUB.0 15,R2,r15
+	JMPLT _L2
+=->	COPY.0 R1,R3
+
+	LSR.0 R1,R2,R1 // R1 := R1 >> R2
+	// if (R2 == 0) goto _L4
+	SUB.0 R2,0,r15
+	JMPEQ _L4
+=->	LSR.0 R0,R2,R0 // R2 := R0 >> R2
+
+	SUB.0 16,R2,R4 // R4 := R4 - R2 (HI)
+	ASR.0 R3,15,R5	// R5 = R1 >>{arith} 15
+	LSL.0 R5,R4,R5 // R5 := R5 << R4
+	LSL.0 R3,R4,R4 // R4 := R1 << R4
+	OR.0 R5,R1,R1 // R3 := R5 IOR R3 (HI)
+	BRA _L4
+	=->	OR.0 R4,R0,R0 // R2 := R4 IOR R0 (HI)
+_L2:
+	ASR.0 R1,15,R1	// R4 = R1 >>{arith} 15
+	SUB.0 16,R2,R5  // R5 := R5 - R2 (HI)
+	LSR.0 R3,R2,R0 // R2 := R1 >> R2
+	LSL.0 R1,R5,R5 // R5 := R4 << R5
+	OR.0 R5,R0,R5 // R2 := R5 IOR R2 (HI)
+	SUB.0 R2,16,r15  // R5 := R5 - R2 (HI)
+	COPYNE R5,R0
+_L4:
+	JR (R12)	// Return to caller 
+
+_picoMark_FUNCTION_END=
+
+// picoChip Function Epilogue : __ashrsi3
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#61# 16#73# 16#68# 16#72# 16#73# 16#69# 16#33# 16#0# // Function name `_ashrsi3'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/ashrsi3.c

@@ -0,0 +1,118 @@
+/*
+
+picoChip GCC support for 32-bit arithmetic shift right.
+
+Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+Contributed by picoChip Designs Ltd.
+Maintained by Daniel Towner (daniel.towner@picochip.com)
+
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; see the file COPYING.  If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+typedef int HItype __attribute__ ((mode (HI)));
+typedef unsigned int UHItype __attribute__ ((mode (HI)));
+typedef unsigned int USItype __attribute__ ((mode (SI)));
+
+typedef struct USIstruct {
+  UHItype low, high;
+} USIstruct;
+
+typedef union USIunion {
+  USItype l;
+  USIstruct s;
+} USIunion;
+
+USItype __ashrsi3(USIunion value, HItype count) {
+  USIunion result;
+  int temp;
+  int wordOfSignBits;
+
+  /* Ignore a zero count until we get into the (count < 16)
+     clause. This is slightly slower when shifting by zero, but faster
+     and smaller in all other cases (due to the better scheduling
+     opportunities available by putting the test near computational
+     instructions. */
+  /* if (count == 0) return value.l; */
+  
+  if (count < 16) {
+    /* Shift low and high words by the count. The high word must use
+       an arithmetic shift. There is no arithmetic shift-right by
+       variable, so synthesise it. */
+    int signWord;
+    int reverseCount;
+
+    /* Shift low and high parts by the count. The upper word now has
+       invalid signed bits. */
+    result.s.low = value.s.low >> count;
+    result.s.high = value.s.high >> count;
+
+    if (count != 0) {
+
+      reverseCount = 16 - count;
+  
+      /* Given a word of sign bits, shift back left to create the
+	 destination sign bits. */
+      wordOfSignBits = __builtin_asri(value.s.high, 15);
+      signWord = wordOfSignBits << reverseCount;
+      result.s.high |= signWord;
+     
+      /* There is now a hole in the upper `count' bits of the low
+	 word. Shift the lower `count' bits of the upper word into the
+	 low word. */
+      temp = value.s.high << reverseCount;
+      result.s.low |= temp;
+    }
+
+  } else {
+    int signWord;
+
+    /* Shift is greater than one word, so top word will always be set
+       to sign bits, and bottom word will be shifted from top word. */
+    result.s.low = value.s.high >> count;
+    result.s.high = __builtin_asri(value.s.high, 15);
+
+    if (count != 16) {
+
+      /* Shift the upper word of the source into the lower word of the
+	 result. Arithmetically shift the upper word as well, to retain
+	 the sign. This shift must be synthesised, as no such shift
+	 exists in the instruction set. */
+      int signWord;
+ 
+
+      /* Given a complete word of sign-bits, shift this back left to
+	 create the destination sign bits. */
+      signWord = result.s.high << (16 - count);
+      //      signWord = wordOfSignBits << (16 - count);
+
+      /* Insert the sign bits to the result's low word. */
+      result.s.low |= signWord;
+
+    }
+
+  }
+
+  return result.l;
+
+}

config/picochip/libgccExtras/clzsi2.asm

@@ -0,0 +1,166 @@
+// picoChip ASM file
+//.file "clzsi2.asm"
+
+.section .text
+
+.global __clzsi2
+__clzsi2:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &__clzsi2 = 0 bytes
+
+	// What value should be operated on? If the top word is empty
+	// then count the bits in the bottom word, and add 16. If the
+	// top word is not empty, then count the bits in the top word.
+
+	// R4 stores the constant 0
+
+	sub.0 R1,0,r15 \ copy.1 16,r2
+	copyeq r0,r1
+	copyne 0,r2
+
+	// R1 now stores value to count, and R2 stores current bit offset.
+	sbc r1,r0
+	asr.0 r1,15,r15 \ add.1 r0,1,r0
+	jr (lr) \ copyne 0,r0
+=->	add.0 r0,r2,r0
+
+_picoMark_FUNCTION_END=
+
+// picoChip Function Epilogue : __clzsi2
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5F# 16#63# 16#6C# 16#7A# 16#73# 16#69# 16#32# 16#0# // Function name `_clzsi2'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/cmpsi2.asm

@@ -0,0 +1,217 @@
+// picoChip ASM file
+//.file "ucmpsi2.c"
+//
+//   Support for 32-bit signed compare.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+//
+// Compiled from the following, and then hand optimised.
+//
+// int __cmpsi2 (USItype x, USItype y)
+// {
+//
+//   SIunion lx; lx.l = x;
+//   SIunion ly; ly.l = y;
+//
+//   if (lx.s.high < ly.s.high)
+//     return 0;
+//   else if (lx.s.high > ly.s.high)
+//     return 2;
+//   if (lx.s.low < ly.s.low)
+//     return 0;
+//   else if (lx.s.low > ly.s.low)
+//     return 2;
+//   return 1;
+// }
+	
+.section .text
+
+.align 8
+.global ___cmpsi2
+___cmpsi2:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &___cmpsi2 = 0 bytes
+
+	SUB.0 R1,R3,r15
+
+        BLT _L1
+=->     SUB.0 R3,R1,r15 \ COPY.1 0,R5
+
+        BLT _L1
+=->     SUB.0 R0,R2,r15 \ COPY.1 2,R5
+
+        BLO _L1
+=->     SUB.0 R2,R0,r15 \ COPY.1 0,R5
+
+        BLO _L1
+=->	COPY.0 2,R5
+	
+        COPY.0 1,R5
+_L1:
+	JR (R12)
+=->     COPY.0 R5,R0
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __cmpsi2
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#5f# 16#63# 16#6d# 16#70# 16#73# 16#69# 16#32# 16#0# // Function name `__cmpsi2'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/divmod15.asm

@@ -0,0 +1,268 @@
+// picoChip ASM file
+//
+//   Support for 16-bit unsigned division/modulus.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+	
+.section .text
+
+.global __divmod15
+__divmod15:
+_picoMark_FUNCTION_BEGIN=
+	
+// picoChip Function Prologue : &__divmod15 = 0 bytes
+
+__divmod15:	
+
+	// The picoChip instruction set has a divstep instruction which
+	// is used to perform one iteration of a binary division algorithm.
+	// The instruction allows 16-bit signed division to be implemented.
+	// It does not directly allow 16-bit unsigned division to be
+	// implemented. Thus, this function pulls out the common division
+	// iteration for 15-bits unsigned, and then special wrappers
+	// provide the logic to change this into a 16-bit signed or
+	// unsigned division, as appropriate. This allows the two
+	// versions of division to share a common implementation, reducing
+	// code size when the two are used together. It also reduces
+	// the maintenance overhead.
+
+	// Input:
+	//	r0 - dividend
+	//	r1 - divisor
+	// Output:
+	//	r0 - quotient
+	//	r1 - remainder
+	// R5 is unused
+	
+	// Check for special cases. The emphasis is on detecting these as
+	// quickly as possible, so that the main division can be started. If 
+	// the user requests division by one, division by self, and so on
+	// then they will just have to accept that this won't be particularly
+	// quick (relatively), whereas a real division (e.g., dividing a 
+	// large value by a small value) will run as fast as possible
+	// (i.e., special case detection should not slow down the common case)
+	//
+	// Special cases to consider:
+	//
+	//	Division by zero.
+	//	Division of zero.
+	//	Inputs are equal
+	//	Divisor is bigger than dividend
+	//	Division by power of two (can be shifted instead).
+	//	Division by 1 (special case of power of two division)
+	//
+	// Division/modulus by zero is undefined (ISO C:6.5.5), so
+	// don't bother handling this special case.
+	//
+	// The special cases of division by a power of 2 are ignored, since 
+	// they cause the general case to slow down. Omitting these
+	// special cases also reduces code size considerably.
+
+	// Handle divisor >= dividend separately. Note that this also handles 
+	// the case where the dividend is zero.	Note that the flags must be
+	// preserved, since they are also used at the branch destination.
+	sub.0 r1,r0,r15
+	sbc r0,r2 \ bge divisorGeDividend
+=->	sbc r1,r4
+	
+	// Compute the shift count. The amount by which the divisor
+	// must be shifted left to be aligned with the dividend.	
+	sub.0 r4,r2,r3
+		
+	// Align the divisor to the dividend. Execute a divstep (since at 
+	// least one will always be executed). Skip the remaining loop
+	// if the shift count is zero.
+	lsl.0 r1,r3,r1 \ beq skipLoop
+=->	divstep r0,r1 \ add.1 r3,1,r2
+
+	// Execute the divstep loop until temp is 0. This assumes that the
+	// loop count is at least one.
+	sub.0 r3,1,r4
+divLoop:	
+	divstep r0,r1 \ bne divLoop
+=->	sub.0 r4,1,r4
+
+skipLoop:
+				
+	// The top bits of the result are the remainder. The bottom
+	// bits are the quotient.
+	lsr.0 r0,r2,r1 \ sub.1 16,r2,r4
+	jr (lr ) \ lsl.0 r0,r4,r0
+=->	lsr.0 r0,r4,r0
+
+// Special case.
+
+divisorGeDividend:	
+	// The divisor is greater than or equal to the dividend. The flags
+	// indicate which of these alternatives it is. The COPYNE can be used 
+	// to set the result appropriately, without introducing any more
+	// branches.
+	copy.0 r0,r1 \ copy.1 0,r0
+	jr (lr) \ copyeq r0,r1
+=->	copyeq 1,r0
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __divmod15
+
+	
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#31# 16#35# 16#0# // Function name `_divmod15'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/divmodhi4.asm

@@ -0,0 +1,251 @@
+// picoChip ASM file
+//
+//   Support for 16-bit signed division/modulus.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+
+.section .text
+
+.align 8		
+.global __divmodhi4
+__divmodhi4:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &__divmodhi4 = 4 bytes
+
+	// 16-bit signed division. Most of the special cases are dealt
+	// with by the 15-bit signed division library (e.g., division by
+	// zero, division by 1, and so on). This wrapper simply inverts	
+	// any negative inputs, calls the 15-bit library, and flips any
+	// results as necessary.  The
+	// only special cases to be handled here are where either the 
+	// divisor or the dividend are the maximum negative values.
+
+	// Encode r5 with a bit pattern which indicates whether the
+	// outputs of the division must be negated. The MSB will be set
+	// to the sign of the dividend (which controls the remainder's
+	// sign), while the LSB will store the XOR of the two signs,
+	// which indicates the quotient's sign. R5 is not modified by the
+	// 15-bit divmod routine.
+	sub.0 r1,16#8000#,r15 \ asr.1 r0,15,r4
+	beq divisorIsLargestNegative \ lsr.0 r1,15,r3
+=->	sub.0 r0,16#8000#,r15 \ xor.1 r3,r4,r5
+
+	// Handle least negative dividend with a special case. Note that the
+	// absolute value of the divisor is also computed here.
+	add.0 [asr r1,15],r1,r3	\ beq dividendIsLargestNegative
+=->	xor.0 [asr r1,15],r3,r1 \ stw lr,(fp)-1	
+	
+	// Compute the absolute value of the dividend, and call the main
+	// divide routine.
+	add.0 r4,r0,r2 \ jl (&__divmod15)  // fn_call &__divmod15
+=->	xor.0 r4,r2,r0
+
+handleNegatedResults:	
+	// Speculatively store the negation of the results.
+	sub.0 0,r0,r2 \ sub.1 0,r1,r3
+
+	// Does the quotient need negating? The LSB indicates this.
+	and.0 r5,1,r15 \ ldw (fp)-1,lr
+	copyne r2,r0
+		
+	asr.0 r5,15,r15 \ jr (lr)
+=->	copyne r3,r1
+	
+dividendIsLargestNegative:
+
+	// Divide the constant -32768. Use the Hacker's Delight
+	// algorithm (i.e., ((dividend / 2) / divisor) * 2) gives
+	// approximate answer). This code is a special case, so no
+	// great effort is made to make it fast, only to make it
+	// small.
+
+	lsr.0 r0,1,r0 \ jl (&__divmod15)  // fn_call &__divmod15
+=->	stw r1,(fp)-2
+
+	// Load the original divisor, and compute the new quotient and
+	// remainder.	
+	lsl.0 r0,1,r0 \ ldw (fp)-2,r3
+	lsl.0 r1,1,r1 // Fill stall slot
+
+	// The error in the quotient is 0 or 1. The error can be determined
+	// by comparing the remainder to the original divisor. If the
+	// remainder is bigger, then an error of 1 has been introduced,
+	// which must be fixed.
+	sub.0 r1,r3,r15
+	blo noCompensationForError
+=->	nop	
+	add.0 r0,1,r0 \ sub.1 r1,r3,r1
+noCompensationForError:
+	bra handleNegatedResults
+=->	nop
+
+divisorIsLargestNegative:	
+	// The flags indicate whether the dividend is also the maximum negative
+	copy.0 r0,r1 \ copy.1 0,r0
+	copyeq r0,r1 \ jr (lr)
+=->	copyeq 1,r0
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __divmodhi4
+	
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x4	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#68# 16#69# 16#34# 16#0# // Function name `_divmodhi4'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+.section .endFile

config/picochip/libgccExtras/divmodsi4.asm

@@ -0,0 +1,239 @@
+// picoChip ASM file
+//
+//   Support for 32-bit signed division/modulus.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+
+//	
+.section .text
+
+.align 8
+.global __divmodsi4
+__divmodsi4:
+_picoMark_FUNCTION_BEGIN=
+// picoChip Function Prologue : &__divmodsi4 = 8 bytes
+
+	// Note: optimising for size is preferred over optimising for speed.
+
+	// Note: the frame is setup throughout the following instructions,
+	// and is complete at the point the udivmodsi4 function is called. 	
+
+	// Note that R9 is encoded with a pattern which indicates
+	// whether the remainder and quotient should be negated on
+	// completion. The MSB is set to the sign of the dividend
+	// (i.e., the sign of the remainder), while the LSB encodes
+	// the XOR of the two input's signs (i.e., the sign of the
+	// quotient.
+	
+	// If dividend is negative, invert the dividend and flag.
+	ASR.0 r1,15,r4
+	BEQ dividendNotNegative
+=->	STL R[9:8],(FP)-2
+
+	// Dividend is negative - negate dividend.
+        SUB.0 0,R0,R0
+        SUBB.0 0,R1,R1
+
+dividendNotNegative:
+			
+	// If divisor is negative, invert the divisor.
+	AND.0 [lsr r3,15],1,r5
+	SUB.0 R3,0, r15
+	BGE divisorNotNegative
+=->	XOR.0 r4,r5,r9
+
+	// Divisor is negative - negate divisor.
+        SUB.0 0,R2,R2
+        SUBB.0 0,R3,R3
+
+divisorNotNegative:
+	
+        STL R[13:12],(FP)-1 \ JL (&__udivmodsi4)
+=->	SUB.0 FP,8,FP  // udivmodsi expects the frame to be valid still.
+	
+	// The LSB of R9 indicates whether the quotient should be negated.
+	AND.0 r9,1,r15
+	BEQ skipQuotientNegation
+=->	LDL (FP)1,R[13:12]	// Convenient point to restore link/fp
+	
+        SUB.0 0,R4,R4
+        SUBB.0 0,R5,R5	
+
+skipQuotientNegation:		
+
+	// The MSB of R9 indicates whether the remainder should be negated.
+	ASR.0 R9,15,r15
+	BEQ epilogue
+
+        SUB.0 0,R6,R6
+        SUBB.0 0,R7,R7
+
+epilogue:	
+
+	JR (R12)
+=->	LDL (FP)-2,R[9:8]
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __divmodsi4
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x8	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#73# 16#69# 16#34# 16#0# // Function name `_divmodsi4'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/fake_libgcc.asm

@@ -0,0 +1,6 @@
+// picoChip ASM file
+// Fake libgcc asm file. This contains nothing, but is used to prevent gcc
+// getting upset about the lack of a libgcc.S file when LIB1ASMFUNCS is defined
+// to switch off the compilation of parts of libgcc.
+
+

config/picochip/libgccExtras/longjmp.asm

@@ -0,0 +1,187 @@
+// picoChip ASM file
+//
+//   Support for 32-bit arithmetic shift right.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+
+.section .text
+
+.global _longjmp
+_longjmp:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &_longjmp = 0 bytes
+
+        LDL (R0)0, R[3:2]
+        LDL (R0)1, R[5:4]
+        LDL (R0)2, R[7:6]
+        LDL (R0)3, R[9:8]
+        LDL (R0)4, R[11:10]
+        LDL (R0)5, R[13:12]
+        LDW (R0)12, R14
+        LDW (R0)13, R1
+        JR (R12)
+=->	COPY.0 1,R0
+        
+// picoChip Function Epilogue : longjmp
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#6c# 16#6f# 16#6e# 16#67# 16#6a# 16#6d# 16#70# 16#0# // Function name `longjmp'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/lshrsi3.asm

@@ -0,0 +1,195 @@
+// picoChip ASM file
+//
+//   Support for 32-bit logical shift right.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+.section .text
+
+.global ___lshrsi3
+___lshrsi3:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &___lshrsi3 = 4 bytes
+
+	// if (R2 > 15) goto _L2
+	SUB.0 15,R2,r15
+	JMPLT _L2
+=->	SUB.0 16,R2,R5 // R5 := R5 - R2 (HI)
+
+	LSR.0 R0,R2,R0 // R4 := R0 >> R2
+	LSR.0 R1,R2,R3 // R3 := R1 >> R2
+	// if (R2 == 0) goto _L4
+	LSL.0 R1,R5,R5 // R5 := R1 << R5
+	OR.0 R5,R0,R4 // R2 := R5 IOR R2 (HI)
+	SUB.0 R2,0,r15
+	COPYNE R4,R0		// R0 := R2
+	JR (R12)	// Return to caller 
+=->	COPY.0 R3,R1		// R1 := R3
+
+_L2:
+	LSR.0 R1,R2,R0  // R2 := R1 >> R2
+	JR (R12)	// Return to caller 
+=->	COPY.0 0,R1	// R3 := 0 (short constant)
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __lshrsi3
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x4	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#5f# 16#6c# 16#73# 16#68# 16#72# 16#72# 16#73# 16#69# 16#33# 16#0# // Function name `__lshrsi3'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+.section .endFile

config/picochip/libgccExtras/lshrsi3.c

@@ -0,0 +1,81 @@
+/*
+
+picoChip GCC support for 32-bit logical shift right.
+
+Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+Contributed by picoChip Designs Ltd.
+Maintained by Daniel Towner (daniel.towner@picochip.com)
+
+This file is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file.  (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; see the file COPYING.  If not, write to
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+typedef int HItype __attribute__ ((mode (HI)));
+typedef unsigned int UHItype __attribute__ ((mode (HI)));
+typedef unsigned int USItype __attribute__ ((mode (SI)));
+
+typedef struct USIstruct {
+  UHItype low, high;
+} USIstruct;
+
+typedef union USIunion {
+  USItype l;
+  USIstruct s;
+} USIunion;
+
+USItype __lshrsi3(USIunion value, HItype count) {
+  USIunion result;
+  int temp;
+
+  /* Ignore a zero count until we get into the (count < 16)
+     clause. This is slightly slower when shifting by zero, but faster
+     and smaller in all other cases (due to the better scheduling
+     opportunities available by putting the test near computational
+     instructions. */
+
+  if (count < 16) {
+    /* Shift low and high words by the count. */
+    result.s.low = value.s.low >> count;
+    result.s.high = value.s.high >> count;
+     
+    /* There is now a hole in the upper `count' bits of the low
+       word. Shift the lower `count' bits of the upper word into the
+       low word. This only works when count isn't zero. */
+    if (count != 0) {
+      temp = value.s.high << (16 - count);
+      result.s.low |= temp;
+    }
+
+  } else {
+    /* Shift the upper word of the source into the lower word of the
+       result, and zero the result's upper word. Note that we actually
+       ned to shift by (count - 16), but as we are only using the
+       bottom 4 bits, this is equivalent to shifting by count. */
+    result.s.low = value.s.high >> count;
+    result.s.high = 0;
+
+  }
+
+  return result.l;
+
+}

config/picochip/libgccExtras/parityhi2.asm

@@ -0,0 +1,184 @@
+// picoChip ASM file
+//.file "ucmpsi2.c"
+//
+//   Support for parity checks.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+	
+.section .text
+
+.align 8
+.global ___parityhi2
+___parityhi2:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &___parityhi2 = 0 bytes
+	XOR.0 [LSR R0,8],R0,R0
+        XOR.0 [LSR R0,4],R0,R0
+        XOR.0 [LSR R0,2],R0,R0
+        JR (R12) \ XOR.0 [LSR R0,1],R0,R0
+=->	AND.0 R0,1,R0
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __parityhi2
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#5f# 16#70# 16#61# 16#72# 16#69# 16#74# 16#79# 16#68# 16#69# 16#32# 16#0# // Function name `__parityhi2'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/popcounthi2.asm

@@ -0,0 +1,206 @@
+// picoChip ASM file
+//.file "popcounthi2.S"
+//
+//   Support for 16-bit population count.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+	
+.section .text
+
+// The following code (taken from a newsgroup posting) was compiled, and then
+// hand assembled (a similar version is given in the Hacker's Delight
+// book, chapter 5).
+//
+// int 
+// popcount (int value)
+// {
+//    value = ((value & 0xAAAA) >> 1) + (value & 0x5555);
+//    value = ((value & 0xCCCC) >> 2) + (value & 0x3333);
+//    value = ((value & 0xF0F0) >> 4) + (value & 0x0F0F);
+//    return ((value & 0xFF00) >> 8) + (value & 0x00FF);
+// }	
+//
+// This assembly function is approx. 20x faster than a naive loop
+// implementation of the population count, but about 30% bigger
+// (45 bytes v. 34 bytes).
+
+.align 8
+.global ___popcounthi2
+___popcounthi2:
+
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &___popcounthi2 = 0 bytes
+
+        AND.0 [LSR R0,1],21845,R0 \ AND.1 R0,21845,R5
+        ADD.0 R0,R5,R0
+        AND.0 [LSR R0,2],13107,R0 \ AND.1 R0,13107,R5
+        ADD.0 R0,R5,R0 \ COPY.1 1807,R2
+        AND.0 [LSR R0,4],R2,R0 \ AND.1 R0,3855,R5
+        ADD.0 R0,R5,R0
+        JR (R12) \ AND.0 R0, 255, R5
+=->	ADD.0 [LSR R0,8],R5,R0
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : ___popcounthi2
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#5f# 16#70# 16#6f# 16#70# 16#63# 16#6f# 16#75# 16#6e# 16#74# 16#68# 16#69# 16#32# 16#0# // Function name `__popcounthi2'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/setjmp.asm

@@ -0,0 +1,187 @@
+// picoChip ASM file
+//
+//   Support for 32-bit arithmetic shift right.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+
+.section .text
+
+.global _setjmp
+_setjmp:
+_picoMark_FUNCTION_BEGIN=
+
+// picoChip Function Prologue : &_setjmp = 0 bytes
+
+        STL R[3:2],(R0)0
+        STL R[5:4],(R0)1
+        STL R[7:6],(R0)2
+        STL R[9:8],(R0)3
+        STL R[11:10],(R0)4
+        STL R[13:12],(R0)5
+        STW R14,(R0)12
+        STW R1,(R0)13
+        JR (R12)
+=->	COPY.0 0,R0
+        
+// picoChip Function Epilogue : setjmp
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#73# 16#65# 16#74# 16#6a# 16#6d# 16#70# 16#0# // Function name `setjmp'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/subdi3.asm

@@ -0,0 +1,196 @@
+// picoChip ASM file
+//
+//   Support for 64-bit subtraction.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Hariharan Sandanagobalane (hariharan@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA..global __divmodhi4
+
+.section .text
+
+.align 8		
+.global __subdi3
+__subdi3:
+
+_picoMark_FUNCTION_BEGIN=
+// picoChip Function Prologue : &__subdi3 = 4 bytes
+
+	// The first operand of sub is completely in registers r[2-5]
+        // The second operand of sub is in stack FP(0-3)
+        // and result need to be written pointed to by the register r0.
+	// All we need to do is to load the appropriate values, sub them 
+        // appropriately (with sub or subb) and then store the values back.
+	ldw (FP)0, r1
+	stl r[7:6], (FP)-1
+	sub.0 r2, r1, r6
+	ldw (FP)1, r1
+	subb.0 r3, r1, r7
+	ldl (FP)1, r[3:2]
+	stl r[7:6], (r0)0
+	subb.0 r4, r2, r6
+	subb.0 r5, r3, r7
+	stl r[7:6], (r0)1
+	jr (r12)
+=->	ldl (FP)2, r[7:6]
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __subdi3
+	
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x4	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#73# 16#75# 16#62# 16#64# 16#69# 16#33# 16#0# // Function name `_subdi3'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+.section .endFile
+

config/picochip/libgccExtras/ucmpsi2.asm

@@ -0,0 +1,214 @@
+// picoChip ASM file
+//.file "ucmpsi2.c"
+//	
+//   Support for 32-bit unsigned compare.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.	
+//
+// Compiled from the following, and then hand optimised.
+//
+// int __ucmpsi2 (USItype x, USItype y)
+// {
+//
+//   USIunion lx; lx.l = x;
+//   USIunion ly; ly.l = y;
+//
+//   if (lx.s.high < ly.s.high)
+//     return 0;
+//   else if (lx.s.high > ly.s.high)
+//     return 2;
+//   if (lx.s.low < ly.s.low)
+//     return 0;
+//   else if (lx.s.low > ly.s.low)
+//     return 2;
+//   return 1;
+// }
+	
+.section .text
+
+.align 8
+.global ___ucmpsi2
+___ucmpsi2:
+_picoMark_FUNCTION_BEGIN=
+// picoChip Function Prologue : &___ucmpsi2 = 0 bytes
+        SUB.0 R1,R3,r15
+
+        BLO _L1
+=->     SUB.0 R3,R1,r15 \ COPY.1 0,R5
+	
+        BLO _L1
+=->     SUB.0 R0,R2,r15 \ COPY.1 2,R5
+	
+        BLO _L1
+=->     SUB.0 R2,R0,r15 \ COPY.1 0,R5
+
+        BLO _L1
+=->	COPY.0 2,R5
+	
+        COPY.0 1,R5
+_L1:
+	JR (R12)
+=->	COPY.0 R5,R0            // R0 := R5
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : __ucmpsi2
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#5f# 16#75# 16#63# 16#6d# 16#70# 16#73# 16#69# 16#32# 16#0# // Function name `__ucmpsi2'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/udivmodhi4.asm

@@ -0,0 +1,243 @@
+// picoChip ASM file
+//
+//   Support for 16-bit unsigned division/modulus.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+	
+.section .text
+
+.global __udivmodhi4
+__udivmodhi4:
+_picoMark_FUNCTION_BEGIN=
+	
+// picoChip Function Prologue : &__udivmodhi4 = 6 bytes
+
+	// 16-bit unsigned division. The divstep function is only capable of
+	// handling 15-bit division (plus a sign to give 16-bits). It is not 
+	// capable of handling unsigned division directly. Instead, take 
+	// advantage of the special property that 
+	// ((divisor / 2) / dividend) * 2 will be almost good enough. The 
+	// error in the result is only 0 or 1, and this can be easily
+	// tested and corrected. A full description of the algorithm can
+	// be found in `Hacker's Delight', by Henry Warren, page 146.
+
+	// Input:
+	//	r0 - dividend
+	//	r1 - divisor
+	// Output:
+	//	r0 - quotient
+	//	r1 - remainder
+	
+	// Note that the lr, and original inputs are speculatively saved. They
+	// will only be restored if the 15-bit division function is called.
+	
+	sub.0 r1,0,r15 \ stl r[0:1],(fp)-1
+	bge divisorIs15bit
+=->	sub.0 r0,r1,r2 \ stw lr,(fp)-3
+	
+	// The divisor is >= 2^15.
+	bhs quotientIs1
+
+	// The dividend < divisor. The quotient is thus 0, and the
+	// remainder is the dividend.
+	copy.0 r0,r1 \ jr (lr)
+=->	copy.0 0,r0
+	
+quotientIs1:	
+	// The dividend >= divisor. The quotient is thus 1, and the
+	// remainder can be computed directly by subtraction (i.e., the
+	// result of the comparison already performed to branch here).
+	jr (lr) \ copy.0 r2,r1
+=->	copy.0 1,r0
+	
+divisorIs15bit:
+	// The divisor is < 2^15.
+
+	// Divide the original dividend by 2, and call the 15-bit division.
+	// Note that the original dividend is stored in r5, which is
+	// known to be unused by the called function, so that
+	// a memory stall isn't introduced immediately after the
+	// function returns, to reload this value from memory.
+	
+	jl (&__divmod15) \ copy.0 r0,r5  // fn_call &__divmod15
+=->     lsr.0 r0,1,r0
+	
+	// Compute the new quotient and remainder by multiplying them by 2.
+	// The remainder will be 1 out, if the original dividend was odd.
+	and.0 r5,1,r5 \ ldl (fp)-1,r[2:3]
+	add.0 [lsl r1,1],r5,r1 \ lsl.1 r0,1,r0
+	
+	// The error in the quotient is 0 or 1. The error can be determined
+	// by comparing the remainder to the original divisor. If the 
+	// remainder is bigger, then an error of 1 has been introduced.
+	sub.0 r1,r3,r15 \ ldw (fp)-3,lr
+	blo noCompensation
+=->	nop	
+	add.0 r0,1,r0 \ sub.1 r1,r3,r1
+noCompensation:
+	jr (lr)
+
+_picoMark_FUNCTION_END=
+// picoChip Function Epilogue : udivmodhi4
+
+	
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x6	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#75# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#68# 16#69# 16#34# 16#0# // Function name `_udivmodhi4'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+.section .endFile
+// End of picoChip ASM file

config/picochip/libgccExtras/udivmodsi4.asm

@@ -0,0 +1,323 @@
+// picoChip ASM file
+//
+//   Support for 32-bit unsigned division/modulus.
+//
+//   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.
+//   Contributed by picoChip Designs Ltd.
+//   Maintained by Daniel Towner (daniel.towner@picochip.com)
+//
+//   This file is free software; you can redistribute it and/or modify it
+//   under the terms of the GNU General Public License as published by the
+//   Free Software Foundation; either version 2, or (at your option) any
+//   later version.
+//
+//   In addition to the permissions in the GNU General Public License, the
+//   Free Software Foundation gives you unlimited permission to link the
+//   compiled version of this file into combinations with other programs,
+//   and to distribute those combinations without any restriction coming
+//   from the use of this file.  (The General Public License restrictions
+//   do apply in other respects; for example, they cover modification of
+//   the file, and distribution when not linked into a combine
+//   executable.)
+//
+//   This file is distributed in the hope that it will be useful, but
+//   WITHOUT ANY WARRANTY; without even the implied warranty of
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//   General Public License for more details.
+//
+//   You should have received a copy of the GNU General Public License
+//   along with this program; see the file COPYING.  If not, write to
+//   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+//   Boston, MA 02110-1301, USA.
+	
+.section .text
+
+.align 8
+.global __udivmodsi4
+__udivmodsi4:
+_picoMark_FUNCTION_BEGIN=
+// picoChip Function Prologue : &__udivmodsi4 = 24 bytes
+	
+	// Schedule the register saves alongside the special cases, so that
+	// if the special cases fail, the registers will have already
+	// been stored onto the stack.
+	SUB.0 R3,R1,r15 \ STL R[13:12],(FP)-1
+	BHS skipCommonCase \ STL R[9:8],(FP)-4
+=->	SUB.0 R2,1,r15 \ STL R[11:10],(FP)-3
+	
+_L2:
+	// Flags set above, and in _L2 caller.
+	BNE restOfCode
+=->	SUB.0 R3,0,r15
+	BNE restOfCode 
+=->	COPY.0 R0,R4 \ COPY.1 R1,R5
+	JR (R12)	// Return to caller
+=->	COPY.0 0,R6 \ COPY.1 0,R7
+	// Never reach here
+
+skipCommonCase:
+	SUB.0 R3,R1,r15
+	BNE _L3	// (Reversed branch) 
+=->	SUB.0 R2,R0,r15 // Must be set in delay slot, so ready by _L9
+
+_L9:
+	BLO _L2	// (Reversed branch)
+=->	SUB.0 R2,1,r15
+	
+_L3:
+	SUB.0 R2,R0,r15
+	BEQ _L10	// (Reversed branch)
+=->	SUB.0 R1,R3,r15 // Set flags for branch at _L10 
+	
+_L4:
+	// greater than
+	COPY.0 0,R4 \ COPY.1 0,R5 \ JR (R12)	// Return to caller
+=->	COPY.0 R0,R6 \ COPY.1 R1,R7
+	// Doesn't reach here.
+		
+_L10:
+	// Flags set in _L10 call delay slot.
+	BNE _L4 
+=->	COPY.0 1,R4 \ COPY.1 0,R5
+	JR (R12)	// Return to caller
+=->	COPY.0 0,R6 \ COPY.1 0,R7
+
+restOfCode:	
+
+// Prologue
+	
+	// Register saves scheduled alongside special cases above.
+	ADD.0 FP,-20,FP \ STW R14,(FP)-4
+
+	// The following can be scheduled together.
+	// dividend in R[9:8] (from R[1:0])
+	// divisor in R[7:6] (from R[3:2])
+	// R14 := clzsi2 (dividend)	
+	// R0 := clzsi2 (divisor)
+	JL (&__clzsi2) \ COPY.0 R0,R8 \ COPY.1 R1,R9
+=->	COPY.0 R2,R6 \ COPY.1 R3,R7
+	COPY.0 R0,R14 \ JL (&__clzsi2)
+=->	COPY.0 R6,R0 \ COPY.1 R7,R1
+
+	// R14 := R0 - R14
+	SUB.0 R0,R14,R14
+
+	ADD.0 R14,1,R0	// R0 := R14 + 1 (HI)
+	
+	// R[11:10] = R[7,6] << R14
+	SUB.0 15,R14,r15
+	LSL.0 R6,R14,R11 \ BLT setupDivstepLoop
+=->	SUB.0 0,R14,R4 \ COPY.1 0,R10
+
+	// Zero shift is a special case. Shifting by zero within a 16-bit
+	// source object is fine, but don't execute the OR of the right-shift
+	// into the final result.
+	LSL.0 R7,R14,R11 \ BEQ setupDivstepLoop
+=->	LSL.0 R6,R14,R10
+	
+	LSR.0 R6,R4,R4
+	OR.0 R11,R4,R11
+	
+setupDivstepLoop:
+
+	// R[5:4] := R[9:8] (SI)
+	COPY.0 R8,R4 \ COPY.1 R9,R5
+	COPY.0 0,R6 \ COPY.1 R0,R8
+
+	// Store original value of loopCount for use after the loop.
+	// The Subtraction is handled in the tail of the loop iteration
+	// after this point.
+	SUB.0 R4,R10,R0 \ COPY.1 R8,R14
+	
+	// workingResult in R4,5,6
+	// temps in r0,1,2 and r7
+	// alignedDivisor in R10,11
+	// loopCount in r8
+	// r3, r9 scratch, used for renaming.
+	
+loopStart:	
+	// R0 := R4 - zeroExtend (R10) - only need 33-bits (i.e., 48-bits)
+	SUBB.0 R5,R11,R1 \ LSR.1 R0,15,R3
+	SUBB.0 R6,0,R2 \ LSR.1 R1,15,R6
+
+	// if (carry) goto shiftOnly
+	SUB.0 R8,1,R8 \ BNE shiftOnly
+=->	LSR.0 R4,15,R7 \ LSL.1 R1,1,R9
+	
+	OR.0 [LSL R0,1],1,R4 \ BNE loopStart
+=->	SUB.0 R4,R10,R0 \ OR.1 R9,R3,R5
+	
+	BRA loopEnd
+	
+shiftOnly:	
+
+	OR.0 [LSL R5,1],R7,R5 \ BNE loopStart \ LSR.1 R5,15,R6
+=->	SUB.0 [LSL R4,1],R10,R0 \LSL.1 R4,1,R4
+	
+// End of loop
+loopEnd:
+
+	// Schedule the computation of the upper word after shifting
+	// alongside the decision over whether to branch, and the register
+	// restores.
+	// R10 is filled with a useful constant.
+	SUB.0 15,r14,r15 \ LDL (FP)4,R[13:12]
+	SUB.1 0,R14,R1 // Don't set flags!
+	LSL.0 R6,R1,R3 \ LDL (FP)-4,R[9:8]
+
+	BLT remainderHasMoreThan16Bits \ LSR.0 R5,R14,R7 \ COPY.1 -1,R10
+=->	LSL.0 R5,R1,R2 \ OR.1 R7,R3,R3
+
+	LSR.0 R4,R14,R3 \ COPY.1 R3,R7
+	BRA epilogue \ LSR.0 -1,R1,R0 \ COPY.1 0,R5
+=->	OR.0 R3,R2,R6 \ AND.1 R0,R4,R4
+	
+remainderHasMoreThan16Bits:	
+
+	LSL.0 R10,R14,R1 \ COPY.1 R3,R6
+	XOR.0 R10,R1,R1 \ COPY.1 0,R7
+	AND.0 R1,R5,R5
+
+epilogue:
+	
+	JR (R12) \ LDW (FP)-4,R14
+=->	LDL (FP)-3,R[11:10]
+
+_picoMark_FUNCTION_END=
+	
+// picoChip Function Epilogue : udivmodsi4
+
+//============================================================================
+// All DWARF information between this marker, and the END OF DWARF
+// marker should be included in the source file. Search for
+// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
+// provide the relevent information. Add markers called
+// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
+// function in question.
+//============================================================================
+
+//============================================================================
+// Frame information. 
+//============================================================================
+
+.section .debug_frame
+_picoMark_DebugFrame=
+
+// Common CIE header.
+.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
+_picoMark_CieBegin=
+.unalignedInitLong 0xffffffff
+.initByte 0x1	// CIE Version
+.ascii 16#0#	// CIE Augmentation
+.uleb128 0x1	// CIE Code Alignment Factor
+.sleb128 2	// CIE Data Alignment Factor
+.initByte 0xc	// CIE RA Column
+.initByte 0xc	// DW_CFA_def_cfa
+.uleb128 0xd
+.uleb128 0x0
+.align 2
+_picoMark_CieEnd=
+
+// FDE 
+_picoMark_LSFDE0I900821033007563=
+.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
+_picoMark_FdeBegin=
+.unalignedInitLong _picoMark_DebugFrame	// FDE CIE offset
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// FDE initial location
+.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x18	// <-- FUNCTION_STACK_SIZE_GOES_HERE
+.initByte 0x4	// DW_CFA_advance_loc4
+.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
+.initByte 0xe	// DW_CFA_def_cfa_offset
+.uleb128 0x0
+.align 2
+_picoMark_FdeEnd=
+
+//============================================================================
+// Abbrevation information.
+//============================================================================
+
+.section .debug_abbrev
+_picoMark_ABBREVIATIONS=
+
+.section .debug_abbrev
+	.uleb128 0x1	// (abbrev code)
+	.uleb128 0x11	// (TAG: DW_TAG_compile_unit)
+	.initByte 0x1	// DW_children_yes
+	.uleb128 0x10	// (DW_AT_stmt_list)
+	.uleb128 0x6	// (DW_FORM_data4)
+	.uleb128 0x12	// (DW_AT_high_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x11	// (DW_AT_low_pc)
+	.uleb128 0x1	// (DW_FORM_addr)
+	.uleb128 0x25	// (DW_AT_producer)
+	.uleb128 0x8	// (DW_FORM_string)
+	.uleb128 0x13	// (DW_AT_language)
+	.uleb128 0x5	// (DW_FORM_data2)
+	.uleb128 0x3	// (DW_AT_name)
+	.uleb128 0x8	// (DW_FORM_string)
+.initByte 0x0
+.initByte 0x0
+
+	.uleb128 0x2	;# (abbrev code)
+	.uleb128 0x2e	;# (TAG: DW_TAG_subprogram)
+.initByte 0x0	;# DW_children_no
+	.uleb128 0x3	;# (DW_AT_name)
+	.uleb128 0x8	;# (DW_FORM_string)
+	.uleb128 0x11	;# (DW_AT_low_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+	.uleb128 0x12	;# (DW_AT_high_pc)
+	.uleb128 0x1	;# (DW_FORM_addr)
+.initByte 0x0
+.initByte 0x0
+
+.initByte 0x0
+
+//============================================================================
+// Line information. DwarfLib requires this to be present, but it can
+// be empty.
+//============================================================================
+
+.section .debug_line
+_picoMark_LINES=
+
+//============================================================================
+// Debug Information
+//============================================================================
+.section .debug_info
+
+//Fixed header.
+.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
+_picoMark_DEBUG_INFO_BEGIN=
+.unalignedInitWord 0x2
+.unalignedInitLong _picoMark_ABBREVIATIONS
+.initByte 0x2
+
+// Compile unit information.
+.uleb128 0x1	// (DIE 0xb) DW_TAG_compile_unit)
+.unalignedInitLong _picoMark_LINES
+.unalignedInitWord _picoMark_FUNCTION_END
+.unalignedInitWord _picoMark_FUNCTION_BEGIN
+// Producer is `picoChip'
+.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
+.unalignedInitWord 0xcafe // ASM language
+.ascii 16#0# // Name. DwarfLib expects this to be present.
+
+.uleb128 0x2	;# (DIE DW_TAG_subprogram)
+
+// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
+// digit is specified using the format 16#XX#
+.ascii 16#5f# 16#75# 16#64# 16#69# 16#76# 16#6d# 16#6f# 16#64# 16#73# 16#69# 16#34# 16#0# // Function name `_udivmodsi4'
+.unalignedInitWord _picoMark_FUNCTION_BEGIN	// DW_AT_low_pc
+.unalignedInitWord _picoMark_FUNCTION_END	// DW_AT_high_pc
+
+.initByte 0x0	// end of compile unit children.
+
+_picoMark_DEBUG_INFO_END=
+
+//============================================================================
+// END OF DWARF
+//============================================================================
+.section .endFile
+// End of picoChip ASM file

config/picochip/picochip-protos.h

@@ -0,0 +1,140 @@
+/* Prototypes for exported functions defined in picochip.c
+
+   Copyright (C) 2000, 2001, 2008 Free Software Foundation, Inc.
+   Contributed by picoChip Designs Ltd. (http://www.picochip.com)
+   Maintained by Daniel Towner (daniel.towner@picochip.com) and
+   Hariharan Sandanagobalane (hariharan@picochip.com).
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GCC is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not, see
+   <http://www.gnu.org/licenses/>. */
+
+#include "target.h"
+extern void picochip_function_prologue (FILE *, HOST_WIDE_INT);
+extern void picochip_function_epilogue (FILE *, HOST_WIDE_INT);
+
+extern enum reg_class picochip_reg_class_from_letter (unsigned);
+extern int picochip_legitimate_address_p (int, struct rtx_def *, unsigned);
+extern int picochip_const_ok_for_letter_p (unsigned HOST_WIDE_INT value, unsigned c);
+
+#ifdef RTX_CODE			/* inside TREE_CODE */
+
+extern int picochip_reg_mode_ok_for_base_p (int mode, rtx x, unsigned strict);
+extern void picochip_print_operand (FILE * file, rtx op, int letter);
+extern void picochip_print_operand_address (FILE * file, rtx operand);
+
+extern const char *picochip_output_cbranch (rtx operands[]);
+extern const char *picochip_output_branch (rtx operands[], rtx insn);
+extern const char *picochip_output_compare (rtx operands[]);
+extern const char *picochip_output_jump (rtx insn);
+
+extern const char *picochip_output_put_array (int alternative,
+					      rtx operands[]);
+extern const char *picochip_output_get_array (int alternative,
+					      rtx operands[]);
+extern const char *picochip_output_testport_array (int alternative,
+						   rtx operands[]);
+
+extern rtx gen_SImode_mem(rtx opnd1,rtx opnd2);
+extern bool ok_to_peephole_stw(rtx opnd0, rtx opnd1, rtx opnd2, rtx opnd3);
+extern bool ok_to_peephole_ldw(rtx opnd0, rtx opnd1, rtx opnd2, rtx opnd3);
+
+extern rtx gen_min_reg(rtx opnd1,rtx opnd2);
+
+extern rtx picochip_function_arg (CUMULATIVE_ARGS cum, int mode, tree type,
+			   int named);
+
+extern rtx picochip_incoming_function_arg (CUMULATIVE_ARGS, int, tree, int);
+extern CUMULATIVE_ARGS picochip_arg_advance (CUMULATIVE_ARGS cum, int mode,
+				      tree type, int named);
+
+extern int picochip_regno_nregs (int regno, int mode);
+extern int picochip_class_max_nregs (int class, int mode);
+
+extern void picochip_order_regs_for_local_alloc (void);
+
+extern int picochip_word_aligned_memory_reference (rtx operand);
+extern int picochip_alignable_memory_operand (rtx operand, enum machine_mode mode);
+extern int picochip_absolute_memory_operand (rtx op, enum machine_mode mode);
+
+extern rtx picochip_function_value (const_tree valtype, const_tree func, bool outgoing);
+extern int picochip_symbol_offset (rtx operand);
+
+extern int picochip_get_function_arg_boundary (enum machine_mode mode);
+
+extern enum reg_class picochip_secondary_reload(bool in_p,
+                                 rtx x,
+                                 enum reg_class cla,
+                                 enum machine_mode mode,
+                                 secondary_reload_info *sri);
+
+extern void picochip_get_hi_aligned_mem (rtx ref, rtx * paligned_mem, rtx * pbitnum);
+
+extern rtx picochip_get_low_const (rtx value);
+extern rtx picochip_get_high_const (rtx value);
+
+extern void picochip_expand_prologue (void);
+extern void picochip_expand_epilogue (int is_sibling_call);
+
+extern void picochip_final_prescan_insn (rtx insn, rtx * operand, int num_operands);
+extern const char *picochip_asm_output_opcode (FILE * f, const char *ptr);
+extern void picochip_override_options (void);
+
+extern int picochip_check_conditional_copy (rtx * operands);
+
+extern rtx picochip_return_addr_rtx(int count, rtx frameaddr);
+extern rtx picochip_struct_value_rtx(tree fntype ATTRIBUTE_UNUSED,
+                              int incoming ATTRIBUTE_UNUSED);
+
+#endif /* RTX_CODE inside TREE_CODE */
+
+void picochip_output_ascii (FILE * file, const char *str, int length);
+
+extern int picochip_hard_regno_mode_ok (int regno, enum machine_mode mode);
+extern void picochip_generate_internal_label (char *str, const char *prefix,
+					      long num);
+
+extern bool picochip_return_in_memory(const_tree type,
+                                      const_tree fntype ATTRIBUTE_UNUSED);
+
+extern int initial_elimination_offset (int from, int to);
+
+extern void picochip_output_aligned_common (FILE * stream, const char *name,
+					    unsigned size, unsigned align);
+
+extern void picochip_output_global (FILE * stream, const char *name);
+
+extern void picochip_output_aligned_local (FILE * stream, const char *name,
+					   unsigned size, unsigned alignment);
+
+extern void picochip_output_label (FILE * stream, const char name[]);
+extern void picochip_output_labelref (FILE * stream, const char name[]);
+extern void picochip_weaken_label (FILE * stream, const char name[]);
+extern void picochip_output_internal_label (FILE * stream, const char *prefix,
+				     unsigned long num);
+
+extern void warn_of_byte_access (void);
+
+/* True if VLIW scheduling is enabled (i.e., second scheduling pass). */
+extern int picochip_flag_schedule_insns2;
+
+extern void picochip_asm_output_anchor (rtx symbol);
+
+/* Instruction set capability flags.  These are initialised to the
+   appropriate values by picochip_override_options, once the user has
+   selected a CPU type. */
+extern bool picochip_has_mul_unit;
+extern bool picochip_has_mac_unit;
+

config/picochip/picochip.h

@@ -0,0 +1,749 @@
+/* Definitions of target machine for GNU compiler for picoChip
+   Copyright (C) 2001, 2008 Free Software Foundation, Inc.
+
+   Contributed by picoChip Designs Ltd. (http://www.picochip.com)
+   Maintained by Daniel Towner (daniel.towner@picochip.com) and
+   Hariharan Sandanagobalane (hariharan@picochip.com).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not, see
+<http://www.gnu.org/licenses/>. */
+
+/* Which type of DFA scheduling to use - schedule for speed (VLIW), or
+   schedule for space.  When scheduling for space, attempt to schedule
+   into stall cycles, but don't pack instructions. */
+
+enum picochip_dfa_type
+{
+  DFA_TYPE_NONE,
+  DFA_TYPE_SPACE,
+  DFA_TYPE_SPEED
+};
+
+extern enum picochip_dfa_type picochip_schedule_type;
+
+/* Controlling the Compilation Driver */
+
+/* Pass through the save-temps command option. */
+#define LINK_SPEC " %{save-temps:--save-temps}"
+
+/* This is an embedded processor, and only supports a cut-down version of
+ * the standard C library. */
+#define LIB_SPEC "-lpicoC"
+
+/* The start file is automatically provided by the linker. */
+#define STARTFILE_SPEC ""
+
+/* Run-time Target Specification  */
+
+/* Define some additional pre-processor macros. */
+#define TARGET_CPU_CPP_BUILTINS()                       \
+  do                                                    \
+    {                                                   \
+      builtin_define ("NO_TRAMPOLINES");                \
+      builtin_define ("PICOCHIP");                      \
+      builtin_define ("__PICOCHIP__");                      \
+    }                                                   \
+  while (0)
+
+/* Translate requests for particular AEs into their respective ISA
+   options. Note that byte access is enabled by default. */
+#define TARGET_OPTION_TRANSLATE_TABLE			      \
+  { "-mae=ANY",   "-mmul-type=none -mno-byte-access" },	      \
+  { "-mae=ANY2",  "-mmul-type=none -mno-byte-access" },	      \
+  { "-mae=ANY3",  "-mmul-type=none" },			      \
+  { "-mae=STAN",  "-mmul-type=none -mno-byte-access" },	      \
+  { "-mae=STAN2", "-mmul-type=mac -mno-byte-access" },	      \
+  { "-mae=STAN3", "-mmul-type=mac " },			      \
+  { "-mae=MAC",   "-mmul-type=mac -mno-byte-access" },	      \
+  { "-mae=MUL",   "-mmul-type=mul" },			      \
+  { "-mae=MEM",   "-mmul-type=mul" },			      \
+  { "-mae=MEM2",  "-mmul-type=mul" },			      \
+  { "-mae=CTRL",  "-mmul-type=mul" },			      \
+  { "-mae=CTRL2", "-mmul-type=mul" }
+
+/* Specify the default options, so that the multilib build doesn't
+   need to provide special cases for the defaults. */
+#define MULTILIB_DEFAULTS \
+  { "mmul-type=mul", "mbyte-access"}
+
+#define TARGET_HAS_BYTE_ACCESS (picochip_has_byte_access)
+#define TARGET_HAS_MUL_UNIT (picochip_has_mul_unit)
+#define TARGET_HAS_MAC_UNIT (picochip_has_mac_unit)
+#define TARGET_HAS_MULTIPLY (picochip_has_mac_unit || picochip_has_mul_unit)
+
+/* Allow some options to be overriden.  In particular, the 2nd
+   scheduling pass option is switched off, and a machine dependent
+   reorganisation ensures that it is run later on, after the second
+   jump optimisation. */
+#define OVERRIDE_OPTIONS picochip_override_options()
+
+#define CAN_DEBUG_WITHOUT_FP 1
+
+#define TARGET_VERSION fprintf(stderr, "(picoChip)");
+
+/* Storage Layout */
+
+/* picoChip processors are 16-bit machines, little endian. */
+
+#define BITS_BIG_ENDIAN 0
+#define BYTES_BIG_ENDIAN 0
+#define WORDS_BIG_ENDIAN 0
+
+#define BITS_PER_UNIT 8
+
+#define BITS_PER_WORD 16
+#define UNITS_PER_WORD (BITS_PER_WORD / BITS_PER_UNIT)
+
+#define POINTER_SIZE BITS_PER_WORD
+
+/* Promote those modes that are smaller than an int, to int mode.  */
+#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
+  ((GET_MODE_CLASS (MODE) == MODE_INT			\
+      && GET_MODE_SIZE (MODE) < UNITS_PER_WORD)		\
+      ? (MODE) = HImode : 0)
+
+/* All parameters are at least this aligned.  Parameters are passed
+   one-per-register. */
+#define PARM_BOUNDARY BITS_PER_WORD
+
+/* The main stack pointer is guaranteed to be aligned to the most
+   strict data alignment. */
+#define STACK_BOUNDARY 32
+
+/* Function entry point is byte aligned. */
+#define FUNCTION_BOUNDARY 8
+
+/* This is the biggest alignment that can be allowed on this machine.
+   Since the STANs have only 256 byte memory, it doesnt make sense
+   to have alignments greater than 32 bytes. Hence the value */
+#define MAX_OFILE_ALIGNMENT 32*8
+
+/* The strictest data object alignment, which repesents a register pair. */
+#define BIGGEST_ALIGNMENT 32
+
+/* The hardware doesn't allow unaligned memory access.  */
+#define STRICT_ALIGNMENT 1
+
+/* We want the 'unix' style bitfield packing algorithm.  */
+#define PCC_BITFIELD_TYPE_MATTERS 1
+
+/* Support up to 64-bit integers. */
+#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (DImode)
+
+/* We don't support floating point, but give it a sensible definition. */
+#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
+
+/* Layout of Source Language Data Types.  */
+
+#define INT_TYPE_SIZE BITS_PER_WORD
+
+/* The normal sizes for C scalar data. */
+#define CHAR_TYPE_SIZE 8
+#define SHORT_TYPE_SIZE 16
+#define LONG_TYPE_SIZE 32
+#define LONG_LONG_TYPE_SIZE 64
+
+/* We don't support the following data types, but still give them
+   sensible values.  */
+#define FLOAT_TYPE_SIZE 32
+#define DOUBLE_TYPE_SIZE 32
+#define LONG_DOUBLE_TYPE_SIZE 32
+
+/* Plain `char' is a signed type, since the hardware sign-extends
+   bytes when loading them from memory into a register. */
+#define DEFAULT_SIGNED_CHAR 1
+
+/* Note that the names of the types used in the following macros must
+   be precisely the same as those defined internally in gcc.  For
+   example, `unsigned short' wouldn't work as a type string, since gcc
+   doesn't define any type with this exact string.  The correct string
+   to use is `short unsigned int'. */
+
+#define SIZE_TYPE "unsigned int"
+
+#define PTRDIFF_TYPE "int"
+
+#define WCHAR_TYPE "short unsigned int"
+#define WCHAR_TYPE_SIZE 16
+
+#define WINT_TYPE "unsigned int"
+
+/* Register Usage  */
+
+/* Picochip has 16 16-bit registers, a condition code register and an
+   (inaccessible) instruction pointer.  One of these registers (r15) is
+   special, and is either used to load a constant anywhere a register
+   can normally be used, or is used to specify a dummy destination
+   (e.g., when setting condition flags).  We also define some pseudo
+   registers to represent condition codes, the frame pointer and the
+   argument pointer.  The latter two are eliminated wherever possible.
+
+   Pairs of general registers may be combined to form 32-bit registers.
+
+   The picoChip registers are as follows:
+
+   0..1 - function return value
+   0..5 - first 6 function parameters
+   6..11 - General purpose
+   12 - link register
+   13 - stack pointer
+   14 - specialized pointer
+   15 - long constant or /dev/null
+   (16) acc0
+   (17) pseudo condition code
+   (18) pseudo frame pointer
+   (19) pseudo arg pointer
+
+   Registers 0..6, 12, 13, 14, 15 are caller save
+   Registers 0..12, 14 are available to the register allocator.
+
+   In addition, the DSP variant of the ISA allows extra accumulator
+   registers to be accessed.  These are special purpose registers,
+   which are not currently used by the compiler.
+
+  */
+
+/* Basic Characteristics of Registers  */
+
+/* We have 16 hard registers plus 3 pseudo hard registers and an accumulator.  */
+#define FIRST_PSEUDO_REGISTER 20
+
+/* The first non-hard register.  Only used internally by the picoChip port. */
+#define FIRST_NONHARD_REGISTER 18
+
+/* Cannot use SP, CST, CC, FP, AP */
+#define FIXED_REGISTERS {0,0,0,0,0,0,0,0, 0,0,0,0,0,1,0,1, 1,1,1,1}
+
+/* Those that are clobbered by a function call (includes pseudo-regs) */
+#define CALL_USED_REGISTERS {1,1,1,1,1,1,0,0, 0,0,0,0,1,1,0,1, 1,1,1,1}
+#define CALL_REALLY_USED_REGISTERS {1,1,1,1,1,1,0,0, 0,0,0,0,1,1,0,0, 0,1,0,0}
+
+/* Define the number of the picoChip link and condition psuedo registers. */
+#define LINK_REGNUM 12
+#define CC_REGNUM 17
+#define ACC_REGNUM 16
+
+/* Order of Allocation of Registers  */
+
+/* The registers are allocated starting with the caller-clobbered
+   registers, in reverse order.  The registers are then listed in an
+   order which means that they are efficiently saved in pairs (i.e.,
+   one 32-bit store can be used instead of two 16-bit stores to save
+   the registers into the stack). The exception to this is the use of
+   r14 (AP) register, which also appears early on.  This is because the
+   AP register can be used to encode memory operations more
+   efficiently than other registers.  Some code can be made more
+   compact as a result. */
+   /* My current feeling is that r14 should go to the end and maybe even r12.
+   It seems like the overhead of store/load that will occur since we cant
+   pair anything up with r14 will be higher than the advantage of smaller
+   encoding.
+   Also r12 is put towards the end for leaf functions. Since leaf functions
+   do not have any calls, the prologue/epilogue for them wouldnt save up/
+   restore its value. So, it doesnt make sense for us to use it in the middle,
+   if we can avoid it. */
+#define REG_ALLOC_ORDER {5,4,3,2,1,0,12,6,7,8,9,10,11,14,16,0,0,0,0,0}
+#define LEAF_REG_ALLOC_ORDER {5,4,3,2,1,0,6,7,8,9,10,11,14,12,16,0,0,0,0,0}
+
+/* We can dynamically change the REG_ALLOC_ORDER using the following hook.
+   It would be desirable to change it for leaf functions so we can put
+   r12 at the end of this list.*/
+#define ORDER_REGS_FOR_LOCAL_ALLOC picochip_order_regs_for_local_alloc ()
+
+/* How Values Fit in Registers  */
+
+/* Number of consecutive hard regs needed starting at reg REGNO
+   to hold something of mode MODE.  */
+#define HARD_REGNO_NREGS(REGNO, MODE) picochip_regno_nregs((REGNO), (MODE))
+
+/* Is it ok to place MODE in REGNO?  Require that the register number
+   be aligned. */
+#define HARD_REGNO_MODE_OK(REGNO, MODE)	picochip_hard_regno_mode_ok(REGNO, MODE)
+
+#define MODES_TIEABLE_P(MODE1,MODE2) 1
+
+/* Don't copy the cc register ('cos you can't put it back).  */
+#define AVOID_CCMODE_COPIES 1
+
+/* Register Classes */
+
+enum reg_class
+{
+  NO_REGS,			/* no registers in set */
+  FRAME_REGS,			/* registers with a long offset  */
+  PTR_REGS,			/* registers without an offset  */
+  CONST_REGS,			/* registers for long constants  */
+  NULL_REGS,			/* registers which ignore writes  */
+  CC_REGS,			/* condition code registers  */
+  ACC_REGS,			/* Accumulator registers  */
+  TWIN_REGS,			/* registers which can be paired */
+  GR_REGS,			/* general purpose registers */
+  ALL_REGS,			/* all registers */
+  LIM_REG_CLASSES,		/* max value + 1 */
+
+  /* Some aliases  */
+  GENERAL_REGS = GR_REGS
+};
+
+#define N_REG_CLASSES (int) LIM_REG_CLASSES
+
+/* The following macro defines cover classes for Integrated Register
+   Allocator.  Cover classes is a set of non-intersected register
+   classes covering all hard registers used for register allocation
+   purpose.  Any move between two registers of a cover class should be
+   cheaper than load or store of the registers.  The macro value is
+   array of register classes with LIM_REG_CLASSES used as the end
+   marker.  */
+
+#define IRA_COVER_CLASSES 						\
+{									\
+  GR_REGS, LIM_REG_CLASSES						\
+}
+
+
+/* The names of the register classes  */
+#define REG_CLASS_NAMES							\
+{									\
+  "NO_REGS",								\
+  "FRAME_REGS",								\
+  "PTR_REGS",								\
+  "CONST_REGS",								\
+  "NULL_REGS", 								\
+  "CC_REGS",								\
+  "ACC_REGS",								\
+  "TWIN_REGS",								\
+  "GR_REGS",								\
+  "ALL_REGS"								\
+}
+
+/* Each reg class is an array of 32-bit integers.  Each array must be
+   long enough to store one bit for every pseudo register. Thus in the
+   following code, each array only stores one 32-bit value. */
+#define REG_CLASS_CONTENTS						\
+{									\
+  {0x00000000}, /* no registers */					\
+  {0x00002000},	/* frame */						\
+  {0x00004000},	/* pointer  */						\
+  {0x00008000}, /* const */						\
+  {0x00008000},	/* null  */						\
+  {0x00020000}, /* cc */						\
+  {0x00010000}, /* acc0 */						\
+  {0x00000FFF},	/* twin */						\
+  {0x000CFFFF},	/* general registers - includes pseudo-arg */    	\
+  {0x000FFFFF}	/* all registers - includes pseudo-arg */               \
+}
+
+/* The earliest register class containing the given register.  */
+extern const enum reg_class picochip_regno_reg_class[FIRST_PSEUDO_REGISTER];
+#define REGNO_REG_CLASS(REGNO) picochip_regno_reg_class[REGNO]
+
+/* Any register can be a base pointer.  */
+#define BASE_REG_CLASS GR_REGS
+
+/* Any register can be an index.  */
+#define INDEX_REG_CLASS GR_REGS
+
+#define REGNO_OK_FOR_BASE_P(REGNO) 					\
+  (REGNO_REG_CLASS (REGNO) != CC_REGS && REGNO_REG_CLASS (REGNO) != ACC_REGS)
+
+#define REGNO_OK_FOR_INDEX_P(REGNO) 0
+
+#define PREFERRED_RELOAD_CLASS(X, CLASS) CLASS
+
+#define CLASS_MAX_NREGS(CLASS, MODE) picochip_class_max_nregs(CLASS, MODE)
+
+
+/* Stack Layout and Calling Conventions  */
+
+#define STACK_GROWS_DOWNWARD 1
+
+/* The frame pointer points to the outgoing argument area, so the
+   locals are above that.  */
+#define STARTING_FRAME_OFFSET 0
+
+#define FIRST_PARM_OFFSET(FNDECL) 0
+
+/* Specify where the return address lives before entry to the
+   prologue.  This is required to enable DWARF debug information to be
+   generated. */
+#define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (Pmode, LINK_REGNUM)
+
+#define RETURN_ADDR_RTX(count,frameaddr) picochip_return_addr_rtx(count,frameaddr)
+
+#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LINK_REGNUM)
+
+/* Registers that Address the Stack Frame  */
+
+#define STACK_POINTER_REGNUM 13
+#define FRAME_POINTER_REGNUM 18
+#define ARG_POINTER_REGNUM   19
+
+/* Static chain is used to pass the local variables of the enclosing function.
+   The static chain is passed in memory. The first long-word location
+   beneath the stack pointer is used. In the presence of pretend
+   arguments, which are written into that location, this mechanism
+   complicates matters. */
+
+/* Location seen by the caller. */
+#define STATIC_CHAIN							\
+  gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, -2 * UNITS_PER_WORD))
+
+/* Location seen by the callee. */
+#define STATIC_CHAIN_INCOMING						\
+  gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, 0))
+
+/* Eliminating Frame Pointer and Arg Pointer.  The frame and argument
+   pointers are eliminated wherever possible, by replacing them with
+   offsets from the stack pointer. */
+
+/* We want to get rid of the frame pointer.  */
+#define FRAME_POINTER_REQUIRED 0
+
+#define ELIMINABLE_REGS 						\
+  {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},				\
+   {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
+
+#define CAN_ELIMINATE(FROM, TO) 1
+
+#define INITIAL_ELIMINATION_OFFSET(FROM,TO,OFFSET) \
+  OFFSET = initial_elimination_offset(FROM, TO);
+
+#define ACCUMULATE_OUTGOING_ARGS 1
+
+#define PUSH_ARGS 0
+
+/* Functions don't pop their args.  */
+#define RETURN_POPS_ARGS(FNDECL, FNTYPE, STACK) 0
+
+/* Passing Arguments in Registers  */
+
+/* Store the offset of the next argument. */
+#define CUMULATIVE_ARGS unsigned
+
+/* Decide how function arguments are handled. */
+#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
+  picochip_function_arg (CUM, MODE, TYPE, NAMED)
+
+/* Incoming arguments are always the same as normal arguments, except
+   for a function which uses variadic arguments, in which case all
+   arguments are effectively passed on the stack. */
+#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
+  picochip_incoming_function_arg(CUM, MODE, TYPE, NAMED)
+
+#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \
+  ((CUM) = 0)
+
+#define FUNCTION_ARG_ADVANCE(CUM,MODE,TYPE,NAMED) \
+  (CUM) = picochip_arg_advance (CUM, MODE, TYPE, NAMED)
+
+/* Originally this used TYPE_ALIGN to determine the
+   alignment.  Unfortunately, this fails in some cases, because the
+   type is unknown (e.g., libcall's). Instead, use GET_MODE_ALIGNMENT
+   since the mode is always present. */
+#define FUNCTION_ARG_BOUNDARY(MODE,TYPE) \
+  picochip_get_function_arg_boundary(MODE)
+
+/* The first 6 registers can hold parameters.  */
+#define FUNCTION_ARG_REGNO_P(REGNO) ((REGNO) < 6)
+
+/* How Scalar Function Values are Returned
+   Do we need this?? */
+#define FUNCTION_VALUE(VALTYPE,FUNC) picochip_function_value(VALTYPE, FUNC, 0)
+
+#define LIBCALL_VALUE(MODE) (gen_rtx_REG (MODE, 0))
+
+/* Results are in register zero.  If an SImode register is returned,
+   reg0 will suffice to mean R[0:1]. */
+#define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == 0)
+
+/* Don't automatically pass struct's in memory - use the
+ * RETURN_IN_MEMORY macro to determine when structs are returned in
+ * memory, and when in registers. */
+#define DEFAULT_PCC_STRUCT_RETURN 0
+
+/* Function Entry and Exit  */
+
+/* The epilogue doesn't clobber anything.  */
+#define EPILOGUE_USES(REGNO) 0
+
+/* Generating Code for Profiling.  No profiling implemented  */
+
+#define FUNCTION_PROFILER(FILE,LABELNO)
+
+/* Trampolines for Nested Functions  */
+
+/* No trampolines.  */
+#define TRAMPOLINE_SIZE 0
+#define INITIALIZE_TRAMPOLINE(ADDR,FNADDR,CHAIN)
+
+/* Addressing Modes  */
+
+#define CONSTANT_ADDRESS_P(X) CONSTANT_P(X)
+
+#define MAX_REGS_PER_ADDRESS 1
+
+#ifdef REG_OK_STRICT
+
+#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) 			\
+ if (picochip_legitimate_address_p (MODE, X, 1)) goto LABEL;
+
+#else /* REG_OK_STRICT */
+
+#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) 			\
+  if (picochip_legitimate_address_p (MODE, X, 0)) goto LABEL;
+
+#endif /* !REG_OK_STRICT */
+
+/* extern struct rtx_def *picochip_legitimize_address */
+/* 	PARAMS ((struct rtx_def *, struct rtx_def *, int)); */
+#define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN);
+
+/* Legitimize reload address tries machine dependent means of
+   reloading addresses.  There seems to be a strange error in gcc,
+   which necessitates this macro.  Consider:
+
+     set (reg A) (symbol_ref)
+     set (reg B) (plus (reg A) (const_int))	
+			
+   A symbol_ref is a valid constant, so the symbol_ref is propagated
+   into the second instruction to generate the instruction:
+
+     set (reg B) (plus (symbol_ref) (const_int))
+
+   This is an invalid address, and find_reloads_address correctly
+   determines this.  However, that function doesn't generate a valid
+   replacement for the now invalid address, and the invalid address is
+   output into the assembly language.  To fix the problem without
+   changing gcc itself, the following macro tests when such an invalid
+   address has been computed, and wraps it up inside a constant rtx.  A
+   constant rtx can be correctly reloaded by the function, and hence
+   correct code is generated. */
+
+#define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_LEVELS,WIN)	     \
+if (picochip_symbol_offset(X)) { X = gen_rtx_CONST(MODE, X); }
+
+/* There are no mode dependent addresses.  */
+#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) do {} while (0)
+
+/* Nonzero if the constant rtx X is a legitimate general operand.  X
+   satisfies CONSTANT_P.  */
+
+#define LEGITIMATE_CONSTANT_P(X) 1
+
+
+/* Condition Code Status  */
+
+#define CC_STATUS_MDEP unsigned
+#define CC_STATUS_MDEP_INIT (cc_status.mdep = 0)
+
+/* Describing Relative Costs of Operations  */
+
+/* Bytes are no faster than words.  */
+#define SLOW_BYTE_ACCESS 1
+
+/* The assembler is often able to optimise function call branches, so
+   don't try to CSE them in the compiler. This was the thinking before.
+   But now, we realise that the benefits from CSE would mostly outweigh
+   the disadvantages. */
+#define NO_FUNCTION_CSE
+
+
+/* Dividing the Output into Sections  */
+
+#define TEXT_SECTION_ASM_OP ".section .text\n"
+#define DATA_SECTION_ASM_OP ".section .data\n"
+#define BSS_SECTION_ASM_OP ".section .bss\n"
+/* picoChip is Harvard (separate data/instruction memories), so
+   read-only data must go into the data section. */
+#define READONLY_DATA_SECTION_ASM_OP ".section .data\n"
+
+/* Defining the Output Assembler Language  */
+
+/* The Overall Framework of an Assembler File  */
+
+#define ASM_FILE_COMMENT "// "
+
+#define ASM_APP_ON "// High-level ASM start\n"
+#define ASM_APP_OFF "// High-level ASM end\n"
+
+#define ASM_OUTPUT_IDENT(STREAM,STRING) fprintf(STREAM, ".ident %s\n", STRING)
+
+/* Output of Data  */
+
+#define ASM_OUTPUT_ASCII(FILE, PTR, LEN) picochip_output_ascii(FILE, PTR, LEN);
+
+/* Output of Uninitialized Variables  */
+#define ASM_OUTPUT_ALIGNED_COMMON(FILE,NAME,SIZE,ALIGN) \
+  picochip_output_aligned_common(FILE, NAME, SIZE, ALIGN)
+
+#define ASM_OUTPUT_ALIGNED_LOCAL(FILE,NAME,SIZE,ALIGN) \
+  picochip_output_aligned_local(FILE, NAME, SIZE, ALIGN)
+
+/* Output and Generation of Labels  */
+
+#define ASM_OUTPUT_LABEL(STREAM,NAME) \
+  do { picochip_output_label(STREAM, NAME); } while (0);
+
+#define ASM_OUTPUT_LABELREF(STREAM, NAME) \
+  { picochip_output_labelref(STREAM, NAME); }
+
+/* Format must match that of picochip_output_label. */
+#define ASM_GENERATE_INTERNAL_LABEL(STRING,PREFIX,NUM) \
+ picochip_generate_internal_label(STRING,PREFIX,(long)NUM)
+
+#define ASM_WEAKEN_LABEL(STREAM,NAME) picochip_weaken_label(STREAM,NAME);
+
+/* Store in OUTPUT a string (made with alloca) containing an
+   assembler-name for a local static variable named NAME.  LABELNO is
+   an integer which is different for each call.  The assembler can't
+   use periods to generate the name, so we use a ___ separator
+   instead. */
+
+#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)  \
+( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 15),    \
+  sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
+
+/* Macros Controlling Initialization Routines  */
+
+/* By defining this, the main function won't try to call `__main'. */
+#define HAS_INIT_SECTION
+
+/* Output of Assembler Instructions  */
+
+#define REGISTER_NAMES							\
+{"R0",  "R1",  "R2",  "R3",						\
+ "R4",  "R5",  "R6",  "R7",						\
+ "R8",  "R9",  "R10", "R11",						\
+ "R12", "FP", "R14", "R15",						\
+ "acc0", "pseudoCC", "pseudoFP", "pseudoAP"}
+
+#define ADDITIONAL_REGISTER_NAMES					\
+{									\
+  { "R0",	 0},							\
+  { "R1",	 1},							\
+  { "R2",	 2},							\
+  { "R3",	 3},							\
+  { "R4",	 4},							\
+  { "R5",	 5},							\
+  { "R6",	 6},							\
+  { "R7",	 7},							\
+  { "R8",	 8},							\
+  { "R9",	 9},							\
+  { "R10",	10},							\
+  { "R11",	11},							\
+  { "R12",	12},							\
+  { "FP",	13},							\
+  { "R14",	14},							\
+  { "R15",	15},							\
+  { "acc0",	16},							\
+  { "sp",	12}, /* ABI stack pointer */				\
+  { "ln",	13}, /* arch link register */				\
+  { "ptr",	14}, /* arch constant pointer */			\
+  { "rc",	15}, /* arch constant register */			\
+  { "rz",	15}, /* arch zero */					\
+}
+
+/* Final prescan insn is called just before an instruction is
+   output.  In our case, we use this to detect the VLIW slot to which
+   the instruction has been assigned, preparatory to generating the
+   VLIW output in ASM_OUTPUT_OPCODE. */
+#define FINAL_PRESCAN_INSN(insn, operand, nop) \
+  picochip_final_prescan_insn (insn, operand,nop)
+
+#define ASM_OUTPUT_OPCODE(FILE,PTR) \
+  { PTR = picochip_asm_output_opcode(FILE, PTR); }
+
+#define PRINT_OPERAND(STREAM,X,CODE) \
+  picochip_print_operand(STREAM, X, CODE)
+
+#define PRINT_OPERAND_PUNCT_VALID_P(code) \
+  (((code) == '|') || ((code) == '#') || ((code) == '>'))
+
+#define PRINT_OPERAND_ADDRESS(STREAM,X) \
+  picochip_print_operand_address(STREAM,X)
+
+/* Output of Dispatch Tables  */
+
+/* Initialise a data memory location to an absolute code label.  Used
+   for building switch statement jump tables.  Note - the format of the
+   label must match that of the function picochip_output_label. */
+#define ASM_OUTPUT_ADDR_VEC_ELT(stream, value) \
+  fprintf (stream, ".initWord _L%d\n", value);
+
+/* Assembler Commands for Alignment  */
+
+#define ASM_OUTPUT_SKIP(STREAM,BYTES) \
+  fprintf(STREAM, ".skip %u\n", BYTES);
+#define ASM_OUTPUT_ALIGN(STREAM,POWER) \
+  fprintf(STREAM, ".align %u\n", 1 << POWER);
+
+/* The elaborator doesn't output zero bytes in the text section. */
+#define ASM_NO_SKIP_IN_TEXT 1
+
+/* Controlling Debugging Information Format  */
+
+/* Macros Affecting All Debugging Formats  */
+
+#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
+
+#define DWARF2_DEBUGGING_INFO
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
+#define DWARF2_FRAME_INFO 1
+
+/* Generate .file/.loc directives, so that the assembler generates the
+   line table. */
+#define DWARF2_ASM_LINE_DEBUG_INFO 1
+
+/* Miscellaneous Parameters  */
+
+#define CASE_VECTOR_MODE HImode
+#define WORD_REGISTER_OPERATIONS
+#define LOAD_EXTEND_OP(MODE) ((MODE) == QImode ? SIGN_EXTEND : ZERO_EXTEND)
+#define MOVE_MAX 4
+#define SHIFT_COUNT_TRUNCATED 1
+#define Pmode HImode
+#define FUNCTION_MODE QImode
+#define TRULY_NOOP_TRUNCATION(OUTPREC,INPREC) 1
+
+#define ASM_LONG ":TODO:.word\t"
+
+/* Define builtins for selected special-purpose instructions. */
+enum picochip_builtins
+{
+  PICOCHIP_BUILTIN_SBC,
+  PICOCHIP_BUILTIN_PUT,
+  PICOCHIP_BUILTIN_GET,
+  PICOCHIP_BUILTIN_TESTPORT,
+  PICOCHIP_BUILTIN_COPYSW,
+  PICOCHIP_BUILTIN_ADDS,
+  PICOCHIP_BUILTIN_SUBS,
+  PICOCHIP_BUILTIN_BREV,
+  PICOCHIP_BUILTIN_BYTESWAP,
+  PICOCHIP_BUILTIN_GET_ARRAY,
+  PICOCHIP_BUILTIN_PUT_ARRAY,
+  PICOCHIP_BUILTIN_TESTPORT_ARRAY,
+  PICOCHIP_BUILTIN_ASRI,
+  PICOCHIP_BUILTIN_PROFILE,
+  PICOCHIP_BUILTIN_HALT
+};
+
+#define NO_DOT_IN_LABEL 1
+
+/* The assembler does support LEB128, despite the auto-configure test
+   not detecting this. */
+#define HAVE_AS_LEB128 1
+
+/* The End */

config/picochip/picochip.opt

@@ -0,0 +1,48 @@
+; Options for the picoChip port of the compiler.
+
+; Copyright (C) 2008 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it under
+; the terms of the GNU General Public License as published by the Free
+; Software Foundation; either version 3, or (at your option) any later
+; version.
+;
+; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+; WARRANTY; without even the implied warranty of MERCHANTABILITY or
+; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+; for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3.  If not, see
+; <http://www.gnu.org/licenses/>.
+
+mae=
+Target RejectNegative Joined Var(picochip_ae_type_string)
+Specify which type of AE to target. This option sets the mul-type
+and byte-access.
+
+mmul-type=
+Target RejectNegative Undocumented Joined Var(picochip_mul_type_string)
+Specify which type of multiplication to use. Can be mem, mac or none.
+
+mbyte-access
+Target Undocumented Var(picochip_has_byte_access,1) Init(1)
+Specify whether the byte access instructions should be used. Enabled by default.
+
+mdebug
+Target RejectNegative Undocumented Mask(DEBUG)
+Enable debug output to be generated.
+
+msymbol-as-address
+Target Mask(SYMBOL_AS_ADDRESS)
+Allow a symbol value to be used as an immediate value in an
+instruction.
+
+minefficient-warnings
+Target Mask(INEFFICIENT_WARNINGS)
+Generate warnings when inefficient code is known to be generated.
+
+minefficient
+Target Mask(INEFFICIENT_WARNINGS) MaskExists Undocumented

config/picochip/predicates.md

@@ -0,0 +1,72 @@
+;; GCC machine description for picochip
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;; Contributed by picoChip Designs Ltd (http://www.picochip.com)
+;; Maintained by Daniel Towner (dant@picochip.com) and Hariharan
+;; Sandanagobalane (hariharan@picochip.com)
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not, see
+;; <http://www.gnu.org/licenses/>.
+
+(define_predicate "picochip_register_or_immediate_operand"
+  (ior (match_operand 0 "register_operand")
+       (match_operand 0 "immediate_operand")))
+
+(define_predicate "power_of_2_imm_operand"
+  (match_code "const_int")
+{
+  if (GET_CODE (op) == CONST_INT)
+    {
+      if (exact_log2 (INTVAL (op)) <= 16 && exact_log2 (INTVAL (op)) > 0)
+        return 1;
+    }
+
+  return 0;
+})
+
+;; Limit the comparison operators to a selected subset.
+(define_predicate "picochip_supported_comparison_operator"
+  (and (match_operand 0 "comparison_operator")
+       (match_code "ne,eq,ge,geu,lt,ltu")))
+(define_predicate "picochip_peephole_comparison_operator"
+  (and (match_operand 0 "comparison_operator")
+       (match_code "ne,eq")))
+
+;; Allow selected arithmetic operators to apply a shift to their first
+;; operands
+
+(define_predicate "picochip_first_op_shift_operator"
+  (match_code "and,plus,minus,ior,xor"))
+
+;; The same as the previous predicate, but only allowing those
+;; operators which can accept an immediate.
+(define_predicate "picochip_first_op_shift_operator_imm"
+  (match_code "plus,minus"))
+
+;; Predicate on a J type integer.
+(define_predicate "picochip_J_operand"
+  (match_operand 0 "immediate_operand")
+  {
+    return (CONST_INT == GET_CODE(op) &&
+            picochip_const_ok_for_letter_p (INTVAL(op), 'J'));
+  })
+
+;; Is the operand suitable for use in a compare?
+
+(define_predicate "picochip_comparison_operand"
+  (ior (match_operand 0 "register_operand")
+       (and (match_operand 0 "immediate_operand")
+            (match_test "picochip_const_ok_for_letter_p(INTVAL(op), 'O')"))))
+

config/picochip/t-picochip

@@ -0,0 +1,62 @@
+# Compile the extra library functions.
+
+LIB2FUNCS_EXTRA = \
+	$(srcdir)/config/picochip/libgccExtras/ashrsi3.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/ashlsi3.asm		\
+	$(srcdir)/config/picochip/libgccExtras/divmodhi4.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/udivmodhi4.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/divmodsi4.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/udivmodsi4.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/divmod15.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/ucmpsi2.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/cmpsi2.asm 		\
+	$(srcdir)/config/picochip/libgccExtras/clzsi2.asm			\
+	$(srcdir)/config/picochip/libgccExtras/adddi3.asm			\
+	$(srcdir)/config/picochip/libgccExtras/subdi3.asm			\
+	$(srcdir)/config/picochip/libgccExtras/lshrsi3.asm		\
+	$(srcdir)/config/picochip/libgccExtras/parityhi2.asm		\
+	$(srcdir)/config/picochip/libgccExtras/popcounthi2.asm
+
+# Prevent some of the more complicated libgcc functions from being
+# compiled. This is because they are generally too big to fit into an
+# AE anyway, so there is no point in having them. Also, some don't
+# compile properly so we'll ignore them for the moment.
+
+LIB1ASMFUNCS = _mulsc3 _divsc3
+LIB1ASMSRC = picochip/libgccExtras/fake_libgcc.asm
+
+# Turn off the building of exception handling libraries.
+LIB2ADDEH =
+LIB2ADDEHDEP =
+
+# Turn off ranlib on target libraries.
+RANLIB_FOR_TARGET = cat
+
+# Special libgcc setup. Make single/double floating point the same,
+# and use our own include files.
+TARGET_LIBGCC2_CFLAGS = -DDF=SF -I../../includes/
+
+# Switch off all debugging for the embedded libraries.
+# (embedded processors need small libraries by default).
+# NOTE: If the debug level is increased, turn off instruction scheduling.
+LIBGCC2_DEBUG_CFLAGS = -g0
+
+# Build all combinations of library for different multiply units, and
+# presence/absence of byte access.
+MULTILIB_OPTIONS = mmul-type=none/mmul-type=mac/mmul-type=mul mno-byte-access/mbyte-access
+
+# Using a mul unit (currently) implies that byte access is available.
+MULTILIB_EXCEPTIONS = mmul-type=mul/mno-byte-access
+
+# We want fine grained libraries, so use the new code
+# to build the floating point emulation libraries.
+FPBIT = fp-bit.c
+
+# Software floating point support. Floating point is not properly
+# supported, but is existence can be useful for some types of testing.
+fp-bit.c:	$(srcdir)/config/fp-bit.c
+	echo '#define FLOAT' > fp-bit.c
+	echo '#define FLOAT_ONLY' >> fp-bit.c
+	echo '#define SMALL_MACHINE' >> fp-bit.c
+	cat $(srcdir)/config/fp-bit.c >> fp-bit.c
+

gcc/ChangeLog

@@ -1,3 +1,13 @@
+2008-09-03  Hari Sandanagobalane  <hariharan@picochip.com>
+
+	Add picoChip port.
+	* doc/extend.texi: Document picoChip builtin functions.
+	* doc/invoke.texi: Document picoChip options.
+	* doc/contrib.texi: Add picoChip contribution.
+	* doc/md.texi: Document picoChip constraints.
+	* config.gcc: Add picochip-*-*.
+	* config/picochip/: Add new port.
+
 2008-09-03  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/37328

gcc/config.gcc

@@ -329,6 +329,9 @@ mips*-*-*)
 	need_64bit_hwint=yes
 	extra_headers="loongson.h"
 	;;
+picochip-*-*)
+        cpu_type=picochip
+        ;;
 powerpc*-*-*)
 	cpu_type=rs6000
 	extra_headers="ppc-asm.h altivec.h spe.h ppu_intrinsics.h paired.h spu2vmx.h vec_types.h si2vmx.h"
@@ -1707,6 +1710,9 @@ pdp11-*-bsd)
         ;;
 pdp11-*-*)
 	;;
+picochip-*)
+        # Nothing special
+        ;;
 # port not yet contributed
 #powerpc-*-openbsd*)
 #	tmake_file="${tmake_file} rs6000/t-fprules rs6000/t-fprules-fpbit "

gcc/doc/contrib.texi

@@ -917,6 +917,10 @@ Teemu Torma for thread safe exception handling support.
 Leonard Tower wrote parts of the parser, RTL generator, and RTL
 definitions, and of the VAX machine description.
 
+@item 
+Daniel Towner and Hariharan Sandanagobalane contributed and 
+maintain the picoChip port.
+
 @item
 Tom Tromey for internationalization support and for his many Java
 contributions and libgcj maintainership.

gcc/doc/extend.texi

@@ -6985,6 +6985,7 @@ instructions, but allow the compiler to schedule those calls.
 * MIPS DSP Built-in Functions::
 * MIPS Paired-Single Support::
 * MIPS Loongson Built-in Functions::
+* picoChip Built-in Functions::
 * PowerPC AltiVec Built-in Functions::
 * SPARC VIS Built-in Functions::
 * SPU Built-in Functions::
@@ -9403,6 +9404,42 @@ else
 @end smallexample
 @end table
 
+@node picoChip Built-in Functions
+@subsection picoChip Built-in Functions
+
+GCC provides an interface to selected machine instructions from the
+picoChip instruction set.
+
+@table @code
+@item int __builtin_sbc (int @var{value})
+Sign bit count.  Return the number of consecutive bits in @var{value}
+which have the same value as the sign-bit.  The result is the number of
+leading sign bits minus one, giving the number of redundant sign bits in
+@var{value}.
+
+@item int __builtin_byteswap (int @var{value})
+Byte swap.  Return the result of swapping the upper and lower bytes of
+@var{value}.
+
+@item int __builtin_brev (int @var{value})
+Bit reversal.  Return the result of reversing the bits in
+@var{value}.  Bit 15 is swapped with bit 0, bit 14 is swapped with bit 1,
+and so on.
+
+@item int __builtin_adds (int @var{x}, int @var{y})
+Saturating addition.  Return the result of adding @var{x} and @var{y},
+storing the value 32767 if the result overflows.
+
+@item int __builtin_subs (int @var{x}, int @var{y})
+Saturating subtraction.  Return the result of subtracting @var{y} from
+@var{x}, storing the value -32768 if the result overflows.
+
+@item void __builtin_halt (void)
+Halt.  The processor will stop execution.  This built-in is useful for
+implementing assertions.
+
+@end table
+
 @node PowerPC AltiVec Built-in Functions
 @subsection PowerPC AltiVec Built-in Functions
 

gcc/doc/invoke.texi

@@ -691,6 +691,10 @@ Objective-C and Objective-C++ Dialects}.
 -mbranch-expensive  -mbranch-cheap @gol
 -msplit  -mno-split  -munix-asm  -mdec-asm}
 
+@emph{picoChip Options}
+@gccoptlist{-mae=@var{ae_type} -mvliw-lookahead=@var{N}
+-msymbol-as-address -mno-inefficient-warnings}
+
 @emph{PowerPC Options}
 See RS/6000 and PowerPC Options.
 
@@ -8603,6 +8607,7 @@ platform.
 * MMIX Options::
 * MN10300 Options::
 * PDP-11 Options::
+* picoChip Options::
 * PowerPC Options::
 * RS/6000 and PowerPC Options::
 * S/390 and zSeries Options::
@@ -13095,6 +13100,54 @@ Use DEC assembler syntax.  This is the default when configured for any
 PDP-11 target other than @samp{pdp11-*-bsd}.
 @end table
 
+@node picoChip Options
+@subsection picoChip Options
+@cindex picoChip options
+
+These @samp{-m} options are defined for picoChip implementations:
+
+@table @gcctabopt
+
+@item -mae=@var{ae_type}
+@opindex mcpu
+Set the instruction set, register set, and instruction scheduling
+parameters for array element type @var{ae_type}.  Supported values
+for @var{ae_type} are @samp{ANY}, @samp{MUL}, and @samp{MAC}.
+
+@option{-mae=ANY} selects a completely generic AE type.  Code
+generated with this option will run on any of the other AE types.  The
+code will not be as efficient as it would be if compiled for a specific
+AE type, and some types of operation (e.g., multiplication) will not
+work properly on all types of AE.
+
+@option{-mae=MUL} selects a MUL AE type.  This is the most useful AE type
+for compiled code, and is the default.
+
+@option{-mae=MAC} selects a DSP-style MAC AE.  Code compiled with this
+option may suffer from poor performance of byte (char) manipulation,
+since the DSP AE does not provide hardware support for byte load/stores.
+
+@item -msymbol-as-address
+Enable the compiler to directly use a symbol name as an address in a
+load/store instruction, without first loading it into a
+register.  Typically, the use of this option will generate larger
+programs, which run faster than when the option isn't used.  However, the
+results vary from program to program, so it is left as a user option,
+rather than being permanently enabled.
+
+@item -mno-inefficient-warnings
+Disables warnings about the generation of inefficient code.  These
+warnings can be generated, for example, when compiling code which
+performs byte-level memory operations on the MAC AE type.  The MAC AE has
+no hardware support for byte-level memory operations, so all byte
+load/stores must be synthesised from word load/store operations.  This is
+inefficient and a warning will be generated indicating to the programmer
+that they should rewrite the code to avoid byte operations, or to target
+an AE type which has the necessary hardware support.  This option enables
+the warning to be turned off.
+
+@end table
+
 @node PowerPC Options
 @subsection PowerPC Options
 @cindex PowerPC options

gcc/doc/md.texi

@@ -1855,6 +1855,46 @@ A memory operand for floating-point loads and stores
 A register indirect memory operand
 @end table
 
+@item picoChip family---@file{picochip.h}
+@table @code
+@item k
+Stack register.
+
+@item f
+Pointer register.  A register which can be used to access memory without
+supplying an offset.  Any other register can be used to access memory,
+but will need a constant offset.  In the case of the offset being zero,
+it is more efficient to use a pointer register, since this reduces code
+size.
+
+@item t
+A twin register.  A register which may be paired with an adjacent
+register to create a 32-bit register.
+
+@item a
+Any absolute memory address (e.g., symbolic constant, symbolic
+constant + offset).
+
+@item I
+4-bit signed integer.
+
+@item J
+4-bit unsigned integer.
+
+@item K
+8-bit signed integer.
+
+@item M
+Any constant whose absolute value is no greater than 4-bits.
+
+@item N
+10-bit signed integer
+
+@item O
+16-bit signed integer.
+
+@end table
+
 @item PowerPC and IBM RS6000---@file{config/rs6000/rs6000.h}
 @table @code
 @item b

libgcc/ChangeLog

@@ -1,3 +1,8 @@
+2008-09-03  Hari Sandanagobalane  <hariharan@picochip.com>
+
+	Add picoChip port.
+	* config.host: Add picochip-*-*.
+
 2008-08-06  Bob Wilson  <bob.wilson@acm.org>
 
 	* config.host: Match more processor names for Xtensa.

libgcc/config.host

@@ -428,6 +428,8 @@ pdp11-*-bsd)
         ;;
 pdp11-*-*)
 	;;
+picochip-*-*)
+        ;;
 powerpc64-*-linux*)
 	tmake_file="${tmake_file} rs6000/t-ppccomm rs6000/t-ldbl128"
 	;;