diff --git a/gcc/config/m68k/3b1.h b/gcc/config/m68k/3b1.h
new file mode 100644
index 00000000000..a93eab79ee5
--- /dev/null
+++ b/gcc/config/m68k/3b1.h
@@ -0,0 +1,480 @@
+/* Definitions of target machine for GNU compiler.
+   AT&T UNIX PC version (pc7300, 3b1)
+
+   Written by Alex Crain
+   bug reports to alex@umbc3.umd.edu
+
+   Copyright (C) 1987 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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 GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#define SGS_SWAP_W		/* Use swap.w rather than just plain swap */
+#define SGS_SWITCH_TABLES	/* Different switch table handling */
+
+#include "hp320.h"
+
+/* See m68k.h.  0 means 680[01]0 with no 68881.  */
+
+#undef TARGET_DEFAULT
+#define	TARGET_DEFAULT 0
+
+/* -m68020 requires special flags to the assembler.  */
+
+#undef ASM_SPEC
+#define ASM_SPEC "%{m68020:-68020}%{!m68020:-68010} %{m68881:-68881}"
+
+/* we use /lib/libp/lib*  when profiling */
+
+#undef LIB_SPEC
+#define LIB_SPEC "%{!shlib:%{p:-L/lib/libp} %{pg:-L/lib/libp} -lc}"
+
+/* shared libraries need to use crt0s.o  */
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{!shlib:%{pg:mcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}\
+   %{shlib:crt0s.o%s shlib.ifile%s} "
+
+/* cpp has to support a #sccs directive for the /usr/include files */
+
+#define SCCS_DIRECTIVE
+
+/* Make output for SDB.  */
+
+#define SDB_DEBUGGING_INFO
+
+/* The .file command should always begin the output.  */
+
+#undef ASM_FILE_START
+#define ASM_FILE_START(FILE) \
+output_file_directive ((FILE), main_input_filename)
+
+/* Don't try to define `gcc_compiled.' since the assembler might not
+   accept symbols with periods and GDB doesn't run on this machine anyway.  */
+#define ASM_IDENTIFY_GCC(FILE)
+
+/* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
+   This will control the use of inline 68881 insns in certain macros.  */
+
+#undef CPP_SPEC
+#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
+
+/* Names to predefine in the preprocessor for this target machine.  */
+/* ihnp4!lmayk!lgm@eddie.mit.edu says mc68000 and m68k should not be here.  */
+
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES "-Dmc68k -Dunix -Dunixpc"
+
+#undef REGISTER_NAMES
+#define REGISTER_NAMES \
+{"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",	\
+ "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",	\
+ "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7"}
+
+/* Specify how to pad function arguments.
+   Value should be `upward', `downward' or `none'.
+   Same as the default, except no padding for large or variable-size args.  */
+
+#define FUNCTION_ARG_PADDING(MODE, TYPE)				\
+  (((MODE) == BLKmode							\
+    ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST		\
+       && int_size_in_bytes (TYPE) < PARM_BOUNDARY / BITS_PER_UNIT)	\
+    : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)				\
+   ? downward : none)
+
+/* Override part of the obstack macros.  */
+
+#define __PTR_TO_INT(P) ((int)(P))
+#define __INT_TO_PTR(P) ((char *)(P))
+
+/* Override parts of m68k.h to fit the SGS-3b1 assembler.  */
+
+#undef TARGET_VERSION
+#undef ASM_FORMAT_PRIVATE_NAME
+#undef ASM_OUTPUT_DOUBLE
+#undef ASM_OUTPUT_FLOAT
+#undef ASM_OUTPUT_ALIGN
+#undef ASM_OUTPUT_SOURCE_FILENAME
+#undef ASM_OUTPUT_SOURCE_LINE
+#undef PRINT_OPERAND_ADDRESS
+#undef ASM_GENERATE_INTERNAL_LABEL
+#undef FUNCTION_PROFILER
+#undef ASM_OUTPUT_ADDR_VEC_ELT
+#undef ASM_OUTPUT_ADDR_DIFF_ELT
+#undef ASM_OUTPUT_INTERNAL_LABEL
+#undef ASM_OUTPUT_OPCODE
+#undef ASM_OUTPUT_LOCAL
+#undef ASM_OUTPUT_LABELREF
+#undef ASM_OUTPUT_ASCII
+
+#define TARGET_VERSION fprintf (stderr, " (68k, SGS/AT&T unixpc syntax)");
+
+/* 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.  */
+
+#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)	\
+( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 12),	\
+  sprintf ((OUTPUT), "%s_%%%d", (NAME), (LABELNO)))
+
+/* The unixpc doesn't know about double's and float's */
+
+#define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
+do { union { double d; long l[2]; } tem;		\
+     tem.d = (VALUE);					\
+     fprintf(FILE, "\tlong 0x%x,0x%x\n", tem.l[0], tem.l[1]); \
+   } while (0)
+
+#define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
+do { union { float f; long l;} tem;			\
+     tem.f = (VALUE);					\
+     fprintf (FILE, "\tlong 0x%x\n", tem.l);	\
+   } while (0)
+
+#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
+  if ((LOG) == 1)			\
+    fprintf (FILE, "\teven\n");	\
+  else if ((LOG) != 0)			\
+    abort ();
+
+/* This is how to output an assembler line
+   that says to advance the location counter by SIZE bytes.  */
+
+#undef ASM_OUTPUT_SKIP
+#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
+  fprintf (FILE, "\tspace %d\n", (SIZE))
+
+/* Can't use ASM_OUTPUT_SKIP in text section; it doesn't leave 0s.  */
+
+#define ASM_NO_SKIP_IN_TEXT 1
+
+/* The beginnings of sdb support... */
+
+#define ASM_OUTPUT_SOURCE_FILENAME(FILE, FILENAME) \
+  fprintf (FILE, "\tfile\t\"%s\"\n", FILENAME)
+
+#define ASM_OUTPUT_SOURCE_LINE(FILE, LINENO)	\
+  fprintf (FILE, "\tln\t%d\n",			\
+	   (sdb_begin_function_line		\
+	    ? last_linenum - sdb_begin_function_line : 1))
+
+/* Yet another null terminated string format. */
+
+#define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \
+  { register int sp = 0, lp = 0; \
+    fprintf ((FILE), "\tbyte\t"); \
+  loop: \
+    if ((PTR)[sp] > ' ' && ! ((PTR)[sp] & 0x80) && (PTR)[sp] != '\\') \
+      { lp += 3; \
+	fprintf ((FILE), "'%c", (PTR)[sp]); } \
+    else \
+      { lp += 5; \
+	fprintf ((FILE), "0x%x", (PTR)[sp]); } \
+    if (++sp < (LEN)) \
+      {	if (lp > 60) \
+	  { lp = 0; \
+	    fprintf ((FILE), "\n%s ", ASCII_DATA_ASM_OP); }	\
+	else \
+	  putc (',', (FILE)); \
+	goto loop; } \
+    putc ('\n', (FILE)); }
+
+/* Note that in the case of the movhi which fetches an element of
+   an ADDR_DIFF_VEC the offset output is too large by 2.
+   This is because the 3b1 assembler refuses to subtract 2.
+   ASM_OUTPUT_CASE_LABEL, below, compensates for this.  */
+
+#define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
+{ register rtx reg1, reg2, breg, ireg;					\
+  register rtx addr = ADDR;						\
+  rtx offset;								\
+  switch (GET_CODE (addr))						\
+    {									\
+    case REG:								\
+      fprintf (FILE, "(%s)", reg_names[REGNO (addr)]);			\
+      break;								\
+    case PRE_DEC:							\
+      fprintf (FILE, "-(%s)", reg_names[REGNO (XEXP (addr, 0))]);	\
+      break;								\
+    case POST_INC:							\
+      fprintf (FILE, "(%s)+", reg_names[REGNO (XEXP (addr, 0))]);	\
+      break;								\
+    case PLUS:								\
+      reg1 = 0;	reg2 = 0;						\
+      ireg = 0;	breg = 0;						\
+      offset = 0;							\
+      if (CONSTANT_ADDRESS_P (XEXP (addr, 0)))				\
+	{								\
+	  offset = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (CONSTANT_ADDRESS_P (XEXP (addr, 1)))			\
+	{								\
+	  offset = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      if (GET_CODE (addr) != PLUS) ;					\
+      else if (GET_CODE (XEXP (addr, 0)) == SIGN_EXTEND)		\
+	{								\
+	  reg1 = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 1)) == SIGN_EXTEND)		\
+	{								\
+	  reg1 = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 0)) == MULT)			\
+	{								\
+	  reg1 = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 1)) == MULT)			\
+	{								\
+	  reg1 = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 0)) == REG)			\
+	{								\
+	  reg1 = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 1)) == REG)			\
+	{								\
+	  reg1 = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      if (GET_CODE (addr) == REG || GET_CODE (addr) == MULT		\
+	  || GET_CODE (addr) == SIGN_EXTEND)				\
+	{ if (reg1 == 0) reg1 = addr; else reg2 = addr; addr = 0; }	\
+/*  for OLD_INDEXING							\
+      else if (GET_CODE (addr) == PLUS)					\
+	{								\
+	  if (GET_CODE (XEXP (addr, 0)) == REG)				\
+	    {								\
+	      reg2 = XEXP (addr, 0);					\
+	      addr = XEXP (addr, 1);					\
+	    }								\
+	  else if (GET_CODE (XEXP (addr, 1)) == REG)			\
+	    {								\
+	      reg2 = XEXP (addr, 1);					\
+	      addr = XEXP (addr, 0);					\
+	    }								\
+	}								\
+  */									\
+      if (offset != 0) { if (addr != 0) abort (); addr = offset; }	\
+      if ((reg1 && (GET_CODE (reg1) == SIGN_EXTEND			\
+		    || GET_CODE (reg1) == MULT))			\
+	  || (reg2 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg2))))		\
+	{ breg = reg2; ireg = reg1; }					\
+      else if (reg1 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg1)))		\
+	{ breg = reg1; ireg = reg2; }					\
+      if (ireg != 0 && breg == 0 && GET_CODE (addr) == LABEL_REF)	\
+        { int scale = 1;						\
+	  if (GET_CODE (ireg) == MULT)					\
+	    { scale = INTVAL (XEXP (ireg, 1));				\
+	      ireg = XEXP (ireg, 0); }					\
+	  if (GET_CODE (ireg) == SIGN_EXTEND)				\
+	    fprintf (FILE, "LD%%%d(%%pc,%s.w",				\
+		     CODE_LABEL_NUMBER (XEXP (addr, 0)),		\
+		     reg_names[REGNO (XEXP (ireg, 0))]); 		\
+	  else								\
+	    fprintf (FILE, "LD%%%d(%%pc,%s.l",				\
+		     CODE_LABEL_NUMBER (XEXP (addr, 0)),		\
+		     reg_names[REGNO (ireg)]);				\
+	  if (scale != 1) fprintf (FILE, "*%d", scale);			\
+	  fprintf (FILE, ")");						\
+	  break; }							\
+      if (breg != 0 && ireg == 0 && GET_CODE (addr) == LABEL_REF)	\
+        { fprintf (FILE, "LD%%%d(%%pc,%s.l",				\
+		   CODE_LABEL_NUMBER (XEXP (addr, 0)),			\
+		   reg_names[REGNO (breg)]);				\
+	  putc (')', FILE);						\
+	  break; }							\
+      if (ireg != 0 || breg != 0)					\
+	{ int scale = 1;						\
+	  if (breg == 0)						\
+	    abort ();							\
+	  if (addr != 0)						\
+	    output_addr_const (FILE, addr);				\
+	  fprintf (FILE, "(%s", reg_names[REGNO (breg)]);		\
+	  if (ireg != 0)					        \
+	    putc (',', FILE);						\
+	  if (ireg != 0 && GET_CODE (ireg) == MULT)			\
+	    { scale = INTVAL (XEXP (ireg, 1));				\
+	      ireg = XEXP (ireg, 0); }					\
+	  if (ireg != 0 && GET_CODE (ireg) == SIGN_EXTEND)		\
+	    fprintf (FILE, "%s.w", reg_names[REGNO (XEXP (ireg, 0))]);	\
+	  else if (ireg != 0)						\
+	    fprintf (FILE, "%s.l", reg_names[REGNO (ireg)]);		\
+	  if (scale != 1) fprintf (FILE, "*%d", scale);			\
+	  putc (')', FILE);						\
+	  break;							\
+	}								\
+      else if (reg1 != 0 && GET_CODE (addr) == LABEL_REF)		\
+	{ fprintf (FILE, "LD%%%d(%%pc,%s.w)",				\
+		   CODE_LABEL_NUMBER (XEXP (addr, 0)),			\
+		   reg_names[REGNO (reg1)]);				\
+	  break; }							\
+    default:								\
+      if (GET_CODE (addr) == CONST_INT					\
+	  && INTVAL (addr) < 0x8000					\
+	  && INTVAL (addr) >= -0x8000)					\
+	fprintf (FILE, "%d", INTVAL (addr));				\
+      else								\
+        output_addr_const (FILE, addr);					\
+    }}
+
+#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)	\
+  sprintf ((LABEL), "%s%%%d", (PREFIX), (NUM))
+
+#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
+    fprintf (FILE, "%s%%%d:\n", PREFIX, NUM)
+
+/* Must put address in  %a0 , not  %d0 . -- LGM, 7/15/88 */
+#define FUNCTION_PROFILER(FILE, LABEL_NO)	\
+    fprintf (FILE, "\tmov.l &LP%%%d,%%a0\n\tjsr mcount\n", (LABEL_NO))
+
+#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)	\
+    fprintf (FILE, "\tlong L%%%d\n", (VALUE))
+
+#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)	\
+    fprintf (FILE, "\tshort L%%%d-L%%%d\n", (VALUE), (REL))
+
+/* ihnp4!lmayk!lgm says that `short 0' triggers assembler bug;
+   `short L%nn-L%nn' supposedly works.  */
+#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLE)			\
+  if (! RTX_INTEGRATED_P (TABLE))					\
+    fprintf (FILE, "\tswbeg &%d\n%s%%%d:\n",				\
+	     XVECLEN (PATTERN (TABLE), 1), (PREFIX), (NUM));		\
+  else									\
+    fprintf (FILE, "\tswbeg &%d\n%s%%%d:\n\tshort %s%%%d-%s%%%d\n",	\
+	     XVECLEN (PATTERN (TABLE), 1) + 1, (PREFIX), (NUM),		\
+	     (PREFIX), (NUM), (PREFIX), (NUM))
+
+/* At end of a switch table, define LD%n iff the symbol LI%n was defined.  */
+#define ASM_OUTPUT_CASE_END(FILE,NUM,TABLE)		\
+  if (RTX_INTEGRATED_P (TABLE))				\
+    fprintf (FILE, "\tset LD%%%d,L%%%d-LI%%%d\n", (NUM), (NUM), (NUM))
+
+#define ASM_OUTPUT_OPCODE(FILE, PTR)			\
+{ if ((PTR)[0] == 'j' && (PTR)[1] == 'b')		\
+    { ++(PTR);						\
+      while (*(PTR) != ' ')				\
+	{ putc (*(PTR), (FILE)); ++(PTR); }		\
+      fprintf ((FILE), ".w"); }				\
+  else if ((PTR)[0] == 'f')				\
+    {							\
+      if (!strncmp ((PTR), "fmove", 5))			\
+	{ fprintf ((FILE), "fmov"); (PTR) += 5; }	\
+      else if (!strncmp ((PTR), "fbne", 4))		\
+	{ fprintf ((FILE), "fbneq"); (PTR) += 4; }	\
+    }							\
+/* MOVE, MOVEA, MOVEQ, MOVEC ==> MOV	*/		\
+  else if ((PTR)[0] == 'm' && (PTR)[1] == 'o'		\
+	   && (PTR)[2] == 'v' && (PTR)[3] == 'e')	\
+    { fprintf ((FILE), "mov"); (PTR) += 4;		\
+       if ((PTR)[0] == 'q' || (PTR)[0] == 'a' ||	\
+	   (PTR)[0] == 'c') (PTR)++; }			\
+/* SUB, SUBQ, SUBA, SUBI ==> SUB */			\
+  else if ((PTR)[0] == 's' && (PTR)[1] == 'u' 		\
+	   && (PTR)[2] == 'b')				\
+    { fprintf ((FILE), "sub"); (PTR) += 3;		\
+       if ((PTR)[0] == 'q' || (PTR)[0] == 'i' || 	\
+	   (PTR)[0] == 'a') (PTR)++; }			\
+/* CMP, CMPA, CMPI, CMPM ==> CMP	*/		\
+  else if ((PTR)[0] == 'c' && (PTR)[1] == 'm'		\
+	   && (PTR)[2] == 'p')				\
+    { fprintf ((FILE), "cmp"); (PTR) += 3;		\
+       if ((PTR)[0] == 'a' || (PTR)[0] == 'i' || 	\
+	   (PTR)[0] == 'm') (PTR)++; }			\
+}
+
+#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
+( fputs ("\tlcomm ", (FILE)),			\
+  assemble_name ((FILE), (NAME)),		\
+  fprintf ((FILE), ",%u\n", (ROUNDED)))
+
+#define ASM_OUTPUT_LABELREF(FILE,NAME)	\
+  fprintf (FILE, "%s", NAME)
+
+/* Override usual definitions of SDB output macros.
+   These definitions differ only in the absence of the period
+   at the beginning of the name of the directive
+   and in the use of `~' as the symbol for the current location.  */
+
+#define PUT_SDB_SCL(a) fprintf(asm_out_file, "\tscl\t%d;", (a))
+#define PUT_SDB_INT_VAL(a) fprintf (asm_out_file, "\tval\t%d;", (a))
+#define PUT_SDB_VAL(a)				\
+( fputs ("\tval\t", asm_out_file),		\
+  output_addr_const (asm_out_file, (a)),	\
+  fputc (';', asm_out_file))
+
+#define PUT_SDB_DEF(a)				\
+do { fprintf (asm_out_file, "\tdef\t");	\
+     ASM_OUTPUT_LABELREF (asm_out_file, a); 	\
+     fprintf (asm_out_file, ";"); } while (0)
+
+#define PUT_SDB_PLAIN_DEF(a) fprintf(asm_out_file,"\tdef\t~%s;",a)
+#define PUT_SDB_ENDEF fputs("\tendef\n", asm_out_file)
+#define PUT_SDB_TYPE(a) fprintf(asm_out_file, "\ttype\t0%o;", a)
+#define PUT_SDB_SIZE(a) fprintf(asm_out_file, "\tsize\t%d;", a)
+#define PUT_SDB_START_DIM fprintf(asm_out_file, "\tdim\t")
+
+#define PUT_SDB_TAG(a)				\
+do { fprintf (asm_out_file, "\ttag\t");	\
+     ASM_OUTPUT_LABELREF (asm_out_file, a);	\
+     fprintf (asm_out_file, ";"); } while (0)
+
+#define PUT_SDB_BLOCK_START(LINE)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~bb;\tval\t~;\tscl\t100;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_BLOCK_END(LINE)			\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~eb;\tval\t~;\tscl\t100;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_FUNCTION_START(LINE)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~bf;\tval\t~;\tscl\t101;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_FUNCTION_END(LINE)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~ef;\tval\t~;\tscl\t101;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_EPILOGUE_END(NAME)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t%s;\tval\t~;\tscl\t-1;\tendef\n",	\
+	   (NAME))
+
+#define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
+  sprintf ((BUFFER), "~%dfake", (NUMBER));
+
+/* Define subroutines to call to handle multiply, divide, and remainder.
+   Use the subroutines that the 3b1's library provides.
+   The `*' prevents an underscore from being prepended by the compiler.  */
+
+#define DIVSI3_LIBCALL "*ldiv"
+#define UDIVSI3_LIBCALL "*uldiv"
+#define MODSI3_LIBCALL "*lrem"
+#define UMODSI3_LIBCALL "*ulrem"
+#define MULSI3_LIBCALL "*lmul"
+#define UMULSI3_LIBCALL "*ulmul"
diff --git a/gcc/config/m68k/tower-as.h b/gcc/config/m68k/tower-as.h
new file mode 100644
index 00000000000..dbf19b37802
--- /dev/null
+++ b/gcc/config/m68k/tower-as.h
@@ -0,0 +1,613 @@
+/* Definitions of target machine for GNU compiler.
+   Copyright (C) 1990 Free Software Foundation, Inc.
+
+   Written by Robert Andersson, International Systems, Oslo, Norway.
+   Send bug reports, questions and improvements to ra@intsys.no.
+
+   For NCR Tower 32/4x0 and 32/6x0 running System V Release 3.
+   This file outputs assembler source suitable for the native Tower as
+   and with sdb debugging symbols.  See tower.h for more comments.
+
+   This file was based on m68k.h, hp320.h and 3b1.h
+   as of the 1.37.1 version.
+
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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 GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#include "tower.h"
+
+
+/* Define __HAVE_68881 in preprocessor only if -m68881 is specified.
+   This will control the use of inline 68881 insns in certain macros.
+   Also, define special define used to identify the Tower assembler.  */
+
+#define CPP_SPEC "-D__TOWER_ASM__ %{m68881:-D__HAVE_68881__}"
+
+/* The startfiles and libraries depend on the -p and -m68881 options.
+   The Tower does not support the -pg option.  */
+
+#define STARTFILE_SPEC                                         \
+"%{p:%{m68881:/usr/lib/fp/mcrt1.o}%{!m68881:/lib/mcrt1.o}}     \
+ %{!p:%{m68881:/usr/lib/fp/crt1.o}%{!m68881:/lib/crt1.o}}"
+
+/* These four macros control how m68k.md is expanded.  */
+
+#define MOTOROLA		/* Use Motorola syntax rather than "MIT" */
+#define SGS			/* Uses SGS assembler */
+#define SGS_CMP_ORDER		/* Takes cmp operands in reverse order */
+#define SGS_NO_LI		/* Suppress jump table label usage */
+
+/* Turn on SDB debugging info.  */
+
+#define SDB_DEBUGGING_INFO
+
+/* This is only useful if gdb is changed, but doesn't harm anyway.  */
+
+#define ASM_IDENTIFY_GCC(FILE) \
+  fprintf (FILE, "gcc2_compiled%%:\n")
+
+/* All the ASM_OUTPUT macros need to conform to the Tower as syntax.  */
+
+#define ASM_OUTPUT_SOURCE_FILENAME(FILE, FILENAME) \
+  fprintf (FILE, "\tfile\t\"%s\"\n", FILENAME)
+
+#define ASM_OUTPUT_SOURCE_LINE(FILE, LINENO)	\
+  fprintf (FILE, "\tln\t%d\n",			\
+	   (sdb_begin_function_line		\
+	    ? last_linenum - sdb_begin_function_line : 1))
+
+#define ASM_OUTPUT_IDENT(FILE, NAME) \
+  fprintf (FILE, "\tident\t\"%s\" \n", NAME)
+
+#define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \
+  { register int sp = 0, lp = 0; \
+    fprintf ((FILE), "\tbyte\t"); \
+  loop: \
+    if ((PTR)[sp] > ' ' && ! ((PTR)[sp] & 0x80) && (PTR)[sp] != '\\') \
+      { lp += 3; \
+	fprintf ((FILE), "'%c", (PTR)[sp]); } \
+    else \
+      { lp += 5; \
+	fprintf ((FILE), "0x%x", (PTR)[sp]); } \
+    if (++sp < (LEN)) \
+      {	if (lp > 60) \
+	  { lp = 0; \
+	    fprintf ((FILE), "\n\tbyte\t"); }	\
+	else \
+	  putc (',', (FILE)); \
+	goto loop; } \
+    putc ('\n', (FILE)); }
+
+/* Translate Motorola opcodes such as `jbeq'
+   into SGS/Tower opcodes such as `beq.w'.
+   Change `move' to `mov'.
+   Change `cmpm' to `cmp'.
+   Change `divsl' to `tdivs'.
+   Change `divul' to `tdivu'.
+   Change `ftst' to `ftest'.
+   Change `fmove' to `fmov'.  */
+
+#define ASM_OUTPUT_OPCODE(FILE, PTR)			\
+{ if ((PTR)[0] == 'j' && (PTR)[1] == 'b')		\
+    { ++(PTR);						\
+      while (*(PTR) != ' ')				\
+	{ putc (*(PTR), (FILE)); ++(PTR); }		\
+      fprintf ((FILE), ".w"); }				\
+  else if ((PTR)[0] == 'm' && (PTR)[1] == 'o'		\
+	   && (PTR)[2] == 'v' && (PTR)[3] == 'e')	\
+    { fprintf ((FILE), "mov"); (PTR) += 4; }		\
+  else if ((PTR)[0] == 'c' && (PTR)[1] == 'm'		\
+	   && (PTR)[2] == 'p' && (PTR)[3] == 'm')	\
+    { fprintf ((FILE), "cmp"); (PTR) += 4; }		\
+  else if ((PTR)[0] == 'd' && (PTR)[1] == 'i'		\
+	   && (PTR)[2] == 'v' && (PTR)[3] == 's'	\
+	   && (PTR)[4] == 'l')				\
+    { fprintf ((FILE), "tdivs"); (PTR) += 5; }		\
+  else if ((PTR)[0] == 'd' && (PTR)[1] == 'i'		\
+	   && (PTR)[2] == 'v' && (PTR)[3] == 'u'	\
+	   && (PTR)[4] == 'l')				\
+    { fprintf ((FILE), "tdivu"); (PTR) += 5; }		\
+  else if ((PTR)[0] == 'f' && (PTR)[1] == 't'		\
+	   && (PTR)[2] == 's' && (PTR)[3] == 't')	\
+    { fprintf ((FILE), "ftest"); (PTR) += 4; }		\
+  else if ((PTR)[0] == 'f' && (PTR)[1] == 'm'		\
+	   && (PTR)[2] == 'o' && (PTR)[3] == 'v' 	\
+	   && (PTR)[4] == 'e')				\
+    { fprintf ((FILE), "fmov"); (PTR) += 5; }		\
+}
+
+
+
+/* Override parts of m68k.h to fit the Tower assembler.
+   This section needs to track changes done to m68k.h in the future.  */
+
+#undef TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (68k, Motorola/SGS/Tower32 syntax)");
+
+#undef BLOCK_PROFILER
+#undef FUNCTION_BLOCK_PROFILER
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABEL_NO)	\
+    fprintf (FILE, "\tmov.l &LP%%%d,%%a0\n\tjsr mcount%%\n", (LABEL_NO))
+
+/* The prologue is identical to the one in m68k.h except that the
+   assembler syntax is different.  */
+
+#undef FUNCTION_PROLOGUE
+#define FUNCTION_PROLOGUE(FILE, SIZE)     \
+{ register int regno;						\
+  register int mask = 0;					\
+  extern char call_used_regs[];					\
+  int fsize = ((SIZE) + 3) & -4;				\
+  if (frame_pointer_needed)					\
+    { if (TARGET_68020 || fsize < 0x8000)			\
+        fprintf (FILE, "\tlink %%a6,&%d\n", -fsize);		\
+      else							\
+	fprintf (FILE, "\tlink %%a6,&0\n\tsub.l &%d,%%sp\n", fsize); }  \
+  for (regno = 24; regno < 56; regno++)                         \
+    if (regs_ever_live[regno] && ! call_used_regs[regno])       \
+      fprintf(FILE, "\tfpmoved %s,-(%%sp)\n",                   \
+	      reg_names[regno]);                                \
+  for (regno = 16; regno < 24; regno++)				\
+    if (regs_ever_live[regno] && ! call_used_regs[regno])	\
+       mask |= 1 << (regno - 16);				\
+  if ((mask & 0xff) != 0)					\
+    fprintf (FILE, "\tfmovm &0x%x,-(%%sp)\n", mask & 0xff);     \
+  mask = 0;							\
+  for (regno = 0; regno < 16; regno++)				\
+    if (regs_ever_live[regno] && ! call_used_regs[regno])	\
+       mask |= 1 << (15 - regno);				\
+  if (frame_pointer_needed)					\
+    mask &= ~ (1 << (15-FRAME_POINTER_REGNUM));			\
+  if (exact_log2 (mask) >= 0)					\
+    fprintf (FILE, "\tmov.l %s,-(%%sp)\n", reg_names[15 - exact_log2 (mask)]); \
+  else if (mask) fprintf (FILE, "\tmovm.l &0x%x,-(%%sp)\n", mask); }
+
+/* The epilogue is identical to the one in m68k.h except that:
+   a) The assembler syntax is different.
+   b) Pointers are returned both in %d0 and %a0.
+   c) FUNCTION_EXTRA_EPILOGUE is not needed.  */
+
+#undef FUNCTION_EPILOGUE
+#define FUNCTION_EPILOGUE(FILE, SIZE) \
+{ register int regno;						\
+  register int mask, fmask;					\
+  register int nregs;						\
+  int offset, foffset, fpoffset;   	                        \
+  extern char call_used_regs[];					\
+  int fsize = ((SIZE) + 3) & -4;				\
+  int big = 0;							\
+  nregs = 0;  fmask = 0; fpoffset = 0;  			\
+  for (regno = 24 ; regno < 56 ; regno++)			\
+    if (regs_ever_live[regno] && ! call_used_regs[regno])	\
+      nregs++;							\
+  fpoffset = nregs*8;						\
+  nregs = 0;							\
+  for (regno = 16; regno < 24; regno++)				\
+    if (regs_ever_live[regno] && ! call_used_regs[regno])	\
+      { nregs++; fmask |= 1 << (23 - regno); }			\
+  foffset = fpoffset + nregs * 12;				\
+  nregs = 0;  mask = 0;						\
+  if (frame_pointer_needed) regs_ever_live[FRAME_POINTER_REGNUM] = 0; \
+  for (regno = 0; regno < 16; regno++)				\
+    if (regs_ever_live[regno] && ! call_used_regs[regno])	\
+      { nregs++; mask |= 1 << regno; }				\
+  offset = foffset + nregs * 4;					\
+  if (offset + fsize >= 0x8000 					\
+      && frame_pointer_needed 					\
+      && (mask || fmask || fpoffset)) 				\
+    { fprintf (FILE, "\tmov.l &%d,%%a0\n", -fsize);		\
+      fsize = 0, big = 1; }					\
+  if (exact_log2 (mask) >= 0) {					\
+    if (big)							\
+      fprintf (FILE, "\tmov.l -%d(%%a6,%%a0.l),%s\n",		\
+	       offset + fsize, reg_names[exact_log2 (mask)]);	\
+    else if (! frame_pointer_needed)				\
+      fprintf (FILE, "\tmov.l (%%sp)+,%s\n",			\
+	       reg_names[exact_log2 (mask)]);			\
+    else							\
+      fprintf (FILE, "\tmov.l -%d(%%a6),%s\n",			\
+	       offset + fsize, reg_names[exact_log2 (mask)]); }	\
+  else if (mask) {						\
+    if (big)							\
+      fprintf (FILE, "\tmovm.l -%d(%%a6,%%a0.l),&0x%x\n",	\
+	       offset + fsize, mask);				\
+    else if (! frame_pointer_needed)				\
+      fprintf (FILE, "\tmovm.l (%%sp)+,&0x%x\n", mask);		\
+    else							\
+      fprintf (FILE, "\tmovm.l -%d(%%a6),&0x%x\n",		\
+	       offset + fsize, mask); }				\
+  if (fmask) {							\
+    if (big)							\
+      fprintf (FILE, "\tfmovm -%d(%%a6,%%a0.l),&0x%x\n",	\
+	       foffset + fsize, fmask);				\
+    else if (! frame_pointer_needed)				\
+      fprintf (FILE, "\tfmovm (%%sp)+,&0x%x\n", fmask);		\
+    else							\
+      fprintf (FILE, "\tfmovm -%d(%%a6),&0x%x\n",		\
+	       foffset + fsize, fmask); }			\
+  if (fpoffset != 0)						\
+    for (regno = 55; regno >= 24; regno--)			\
+      if (regs_ever_live[regno] && ! call_used_regs[regno]) {	\
+	if (big)						\
+	  fprintf(FILE, "\tfpmoved -%d(%%a6,%%a0.l),%s\n",	\
+		  fpoffset + fsize, reg_names[regno]);		\
+	else if (! frame_pointer_needed)			\
+	  fprintf(FILE, "\tfpmoved (%%sp)+,%s\n",		\
+		  reg_names[regno]);				\
+	else							\
+	  fprintf(FILE, "\tfpmoved -%d(%%a6),%s\n",		\
+		  fpoffset + fsize, reg_names[regno]);		\
+	fpoffset -= 8;						\
+      }								\
+  if (current_function_returns_pointer)                         \
+    fprintf (FILE, "\tmov.l %%d0,%%a0\n");                      \
+  if (frame_pointer_needed)					\
+    fprintf (FILE, "\tunlk %%a6\n");				\
+  if (current_function_pops_args)				\
+    fprintf (FILE, "\trtd &%d\n", current_function_pops_args);	\
+  else fprintf (FILE, "\trts\n"); }
+
+/* This is how to output an insn to push a register on the stack.
+   It need not be very fast code.  */
+
+#undef ASM_OUTPUT_REG_PUSH
+#define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
+  fprintf (FILE, "\tmov.l %s,-(%%sp)\n", reg_names[REGNO])
+
+/* This is how to output an insn to pop a register from the stack.
+   It need not be very fast code.  */
+
+#undef ASM_OUTPUT_REG_POP
+#define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
+  fprintf (FILE, "\tmov.l (%%sp)+,%s\n", reg_names[REGNO])
+
+#undef ASM_FILE_START
+#define ASM_FILE_START(FILE) \
+( fprintf (FILE, "#NO_APP\n"), \
+  output_file_directive ((FILE), main_input_filename))
+
+#undef TEXT_SECTION_ASM_OP
+#define TEXT_SECTION_ASM_OP "\ttext"
+
+#undef DATA_SECTION_ASM_OP
+#define DATA_SECTION_ASM_OP "\tdata"
+
+/* This says how to output an assembler line to define a global common symbol.
+   We use SIZE rather than ROUNDED, as this is what the native cc does.  */
+
+#undef ASM_OUTPUT_COMMON
+#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
+( fputs ("\tcomm ", (FILE)),			\
+  assemble_name ((FILE), (NAME)),		\
+  fprintf ((FILE), ",%d\n", ((SIZE) == 0) ? (ROUNDED) : (SIZE)))
+
+/* This says how to output an assembler line to define a local common symbol.
+   We use SIZE rather than ROUNDED, as this is what the native cc does.  */
+
+#undef ASM_OUTPUT_LOCAL
+#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
+( fputs ("\tlcomm ", (FILE)),			\
+  assemble_name ((FILE), (NAME)),		\
+  fprintf ((FILE), ",%d\n", ((SIZE) == 0) ? (ROUNDED) : (SIZE)))
+
+/* 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.  */
+
+#undef ASM_FORMAT_PRIVATE_NAME
+#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)	\
+( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 11),	\
+  sprintf ((OUTPUT), "%s%%%%%d", (NAME), (LABELNO)))
+
+/* This is how to output a command to make the user-level label named NAME
+   defined for reference from other files.  */
+
+#undef ASM_GLOBALIZE_LABEL
+#define ASM_GLOBALIZE_LABEL(FILE,NAME)	\
+do { fputs ("\tglobal ", FILE);         \
+     assemble_name (FILE, NAME);        \
+     fputs ("\n", FILE);                \
+   } while (0)
+
+#undef ASM_GENERATE_INTERNAL_LABEL
+#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)	\
+  sprintf ((LABEL), "%s%%%d", (PREFIX), (NUM))
+
+#undef ASM_OUTPUT_INTERNAL_LABEL
+#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
+  fprintf ((FILE), "%s%%%d:\n", (PREFIX), (NUM))
+
+#undef ASM_OUTPUT_CASE_LABEL
+#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLE)			\
+  fprintf (FILE, "\tswbeg &%d\n%s%%%d:\n",				\
+           XVECLEN (PATTERN (TABLE), 1), (PREFIX), (NUM));		\
+
+#undef ASM_OUTPUT_DOUBLE
+#define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
+do { union { double d; long l[2]; } tem;		\
+     tem.d = (VALUE);					\
+     fprintf(FILE, "\tlong 0x%x,0x%x\n", tem.l[0], tem.l[1]); \
+   } while (0)
+
+#undef ASM_OUTPUT_FLOAT
+#define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
+do { union { float f; long l;} tem;			\
+     tem.f = (VALUE);					\
+     fprintf (FILE, "\tlong 0x%x\n", tem.l);	\
+   } while (0)
+
+/* This is how to output an assembler line defining an `int' constant.  */
+
+#undef ASM_OUTPUT_INT
+#define ASM_OUTPUT_INT(FILE,VALUE)  \
+( fprintf (FILE, "\tlong "),			\
+  output_addr_const (FILE, (VALUE)),		\
+  fprintf (FILE, "\n"))
+
+/* Likewise for `char' and `short' constants.  */
+
+#undef ASM_OUTPUT_SHORT
+#define ASM_OUTPUT_SHORT(FILE,VALUE)  \
+( fprintf (FILE, "\tshort "),			\
+  output_addr_const (FILE, (VALUE)),		\
+  fprintf (FILE, "\n"))
+
+#undef ASM_OUTPUT_CHAR
+#define ASM_OUTPUT_CHAR(FILE,VALUE)  \
+( fprintf (FILE, "\tbyte "),			\
+  output_addr_const (FILE, (VALUE)),		\
+  fprintf (FILE, "\n"))
+
+/* This is how to output an assembler line for a numeric constant byte.  */
+
+#undef ASM_OUTPUT_BYTE
+#define ASM_OUTPUT_BYTE(FILE,VALUE)  \
+  fprintf (FILE, "\tbyte 0x%x\n", (VALUE))
+
+#undef ASM_OUTPUT_ADDR_VEC_ELT
+#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
+  fprintf (FILE, "\tlong L%%%d\n", (VALUE))
+
+#undef ASM_OUTPUT_ADDR_DIFF_ELT
+#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
+  fprintf (FILE, "\tshort L%%%d-L%%%d\n", (VALUE), (REL))
+
+#undef ASM_OUTPUT_ALIGN
+#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
+  if ((LOG) == 1)			\
+    fprintf (FILE, "\teven\n");	        \
+  else if ((LOG) != 0)			\
+    abort ();
+
+#undef ASM_OUTPUT_SKIP
+#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
+  fprintf (FILE, "\tspace %d\n", (SIZE))
+
+#undef PRINT_OPERAND
+#define PRINT_OPERAND(FILE, X, CODE)  \
+{ if (CODE == '.') fprintf (FILE, ".");					\
+  else if (CODE == '#') fprintf (FILE, "&");				\
+  else if (CODE == '-') fprintf (FILE, "-(%%sp)");			\
+  else if (CODE == '+') fprintf (FILE, "(%%sp)+");			\
+  else if (CODE == '@') fprintf (FILE, "(%%sp)");			\
+  else if (CODE == '!') fprintf (FILE, "%%cc");				\
+  else if (GET_CODE (X) == REG)						\
+    fprintf (FILE, "%s", reg_names[REGNO (X)]);				\
+  else if (GET_CODE (X) == MEM)						\
+    output_address (XEXP (X, 0));					\
+  else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == SFmode)	\
+    { union { double d; int i[2]; } u;					\
+      union { float f; int i; } u1;					\
+      u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);	\
+      u1.f = u.d;							\
+      fprintf (FILE, "&0x%x", u1.i); }				        \
+  else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == DFmode)	\
+      fprintf (FILE, "&0x%x%08x", CONST_DOUBLE_LOW (X), CONST_DOUBLE_HIGH (X));\
+  else { putc ('&', FILE); output_addr_const (FILE, X); }}
+
+/* Note that this contains a kludge that knows that the only reason
+   we have an address (plus (label_ref...) (reg...))
+   is in the insn before a tablejump, and we know that the table is
+   exactly 10 bytes away.  */
+
+#undef PRINT_OPERAND_ADDRESS
+#define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
+{ register rtx reg1, reg2, breg, ireg;					\
+  register rtx addr = ADDR;						\
+  rtx offset;								\
+  switch (GET_CODE (addr))						\
+    {									\
+    case REG:								\
+      fprintf (FILE, "(%s)", reg_names[REGNO (addr)]);			\
+      break;								\
+    case PRE_DEC:							\
+      fprintf (FILE, "-(%s)", reg_names[REGNO (XEXP (addr, 0))]);	\
+      break;								\
+    case POST_INC:							\
+      fprintf (FILE, "(%s)+", reg_names[REGNO (XEXP (addr, 0))]);	\
+      break;								\
+    case PLUS:								\
+      reg1 = 0;	reg2 = 0;						\
+      ireg = 0;	breg = 0;						\
+      offset = 0;							\
+      if (CONSTANT_ADDRESS_P (XEXP (addr, 0)))				\
+	{								\
+	  offset = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (CONSTANT_ADDRESS_P (XEXP (addr, 1)))			\
+	{								\
+	  offset = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      if (GET_CODE (addr) != PLUS) ;					\
+      else if (GET_CODE (XEXP (addr, 0)) == SIGN_EXTEND)		\
+	{								\
+	  reg1 = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 1)) == SIGN_EXTEND)		\
+	{								\
+	  reg1 = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 0)) == MULT)			\
+	{								\
+	  reg1 = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 1)) == MULT)			\
+	{								\
+	  reg1 = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 0)) == REG)			\
+	{								\
+	  reg1 = XEXP (addr, 0);					\
+	  addr = XEXP (addr, 1);					\
+	}								\
+      else if (GET_CODE (XEXP (addr, 1)) == REG)			\
+	{								\
+	  reg1 = XEXP (addr, 1);					\
+	  addr = XEXP (addr, 0);					\
+	}								\
+      if (GET_CODE (addr) == REG || GET_CODE (addr) == MULT		\
+	  || GET_CODE (addr) == SIGN_EXTEND)				\
+	{ if (reg1 == 0) reg1 = addr; else reg2 = addr; addr = 0; }	\
+/*  for OLD_INDEXING							\
+      else if (GET_CODE (addr) == PLUS)					\
+	{								\
+	  if (GET_CODE (XEXP (addr, 0)) == REG)				\
+	    {								\
+	      reg2 = XEXP (addr, 0);					\
+	      addr = XEXP (addr, 1);					\
+	    }								\
+	  else if (GET_CODE (XEXP (addr, 1)) == REG)			\
+	    {								\
+	      reg2 = XEXP (addr, 1);					\
+	      addr = XEXP (addr, 0);					\
+	    }								\
+	}								\
+  */									\
+      if (offset != 0) { if (addr != 0) abort (); addr = offset; }	\
+      if ((reg1 && (GET_CODE (reg1) == SIGN_EXTEND			\
+		    || GET_CODE (reg1) == MULT))			\
+	  || (reg2 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg2))))		\
+	{ breg = reg2; ireg = reg1; }					\
+      else if (reg1 != 0 && REGNO_OK_FOR_BASE_P (REGNO (reg1)))		\
+	{ breg = reg1; ireg = reg2; }					\
+      if (ireg != 0 && breg == 0 && GET_CODE (addr) == LABEL_REF)	\
+        { int scale = 1;						\
+	  if (GET_CODE (ireg) == MULT)					\
+	    { scale = INTVAL (XEXP (ireg, 1));				\
+	      ireg = XEXP (ireg, 0); }					\
+	  if (GET_CODE (ireg) == SIGN_EXTEND)				\
+	    fprintf (FILE, "10(%%pc,%s.w",				\
+		     reg_names[REGNO (XEXP (ireg, 0))]); 		\
+	  else								\
+	    fprintf (FILE, "10(%%pc,%s.l",				\
+		     reg_names[REGNO (ireg)]);				\
+	  if (scale != 1) fprintf (FILE, "*%d", scale);			\
+	  putc (')', FILE);						\
+	  break; }							\
+      if (ireg != 0 || breg != 0)					\
+	{ int scale = 1;						\
+	  if (breg == 0)						\
+	    abort ();							\
+	  if (addr != 0)						\
+	    output_addr_const (FILE, addr);				\
+	  fprintf (FILE, "(%s", reg_names[REGNO (breg)]);		\
+	  if (ireg != 0)						\
+	    putc (',', FILE);						\
+	  if (ireg != 0 && GET_CODE (ireg) == MULT)			\
+	    { scale = INTVAL (XEXP (ireg, 1));				\
+	      ireg = XEXP (ireg, 0); }					\
+	  if (ireg != 0 && GET_CODE (ireg) == SIGN_EXTEND)		\
+	    fprintf (FILE, "%s.w", reg_names[REGNO (XEXP (ireg, 0))]);	\
+	  else if (ireg != 0)						\
+	    fprintf (FILE, "%s.l", reg_names[REGNO (ireg)]);		\
+	  if (scale != 1) fprintf (FILE, "*%d", scale);			\
+	  putc (')', FILE);						\
+	  break;							\
+	}								\
+      else if (reg1 != 0 && GET_CODE (addr) == LABEL_REF)		\
+	{ fprintf (FILE, "10(%%pc,%s.w)",				\
+		   reg_names[REGNO (reg1)]);				\
+	  break; }							\
+    default:								\
+        output_addr_const (FILE, addr);					\
+    }}
+
+
+
+/* Override usual definitions of SDB output macros.
+   These definitions differ only in the absence of the period
+   at the beginning of the name of the directive
+   and in the use of `~' as the symbol for the current location.  */
+
+#define PUT_SDB_SCL(a) fprintf(asm_out_file, "\tscl\t%d;", (a))
+#define PUT_SDB_INT_VAL(a) fprintf (asm_out_file, "\tval\t%d;", (a))
+#define PUT_SDB_VAL(a)				\
+( fputs ("\tval\t", asm_out_file),		\
+  output_addr_const (asm_out_file, (a)),	\
+  fputc (';', asm_out_file))
+
+#define PUT_SDB_DEF(a)				\
+do { fprintf (asm_out_file, "\tdef\t");	\
+     ASM_OUTPUT_LABELREF (asm_out_file, a); 	\
+     fprintf (asm_out_file, ";"); } while (0)
+
+#define PUT_SDB_PLAIN_DEF(a) fprintf(asm_out_file,"\tdef\t~%s;",a)
+#define PUT_SDB_ENDEF fputs("\tendef\n", asm_out_file)
+#define PUT_SDB_TYPE(a) fprintf(asm_out_file, "\ttype\t0%o;", a)
+#define PUT_SDB_SIZE(a) fprintf(asm_out_file, "\tsize\t%d;", a)
+#define PUT_SDB_DIM(a) fprintf(asm_out_file, "\tdim\t%d;", a)
+
+#define PUT_SDB_TAG(a)				\
+do { fprintf (asm_out_file, "\ttag\t");	\
+     ASM_OUTPUT_LABELREF (asm_out_file, a);	\
+     fprintf (asm_out_file, ";"); } while (0)
+
+#define PUT_SDB_BLOCK_START(LINE)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~bb;\tval\t~;\tscl\t100;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_BLOCK_END(LINE)			\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~eb;\tval\t~;\tscl\t100;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_FUNCTION_START(LINE)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~bf;\tval\t~;\tscl\t101;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_FUNCTION_END(LINE)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t~ef;\tval\t~;\tscl\t101;\tline\t%d;\tendef\n",	\
+	   (LINE))
+
+#define PUT_SDB_EPILOGUE_END(NAME)		\
+  fprintf (asm_out_file,			\
+	   "\tdef\t%s;\tval\t~;\tscl\t-1;\tendef\n",	\
+	   (NAME))
+
+#define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
+  sprintf ((BUFFER), "~%dfake", (NUMBER));