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[ARM] 3049/1: More optimized libgcc functions
Patch from Nicolas Pitre This patch gets rid of the last C implementations of needed libgcc functions for the kernel, replacing them with optimized assembly versions. Those functions are: __ashldi3 __ashrdi3 __lshrdi3 __muldi3 __ucmpdi2 The first 3 were lifted from gcc, the other two were written from scratch. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Nicolas Pitre
Russell King
parent
cb7610d018
commit
f741a1aab5
48
arch/arm/lib/ashldi3.S
Normal file
48
arch/arm/lib/ashldi3.S
Normal file
@ -0,0 +1,48 @@
|
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/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
|
||||
Free Software Foundation, Inc.
|
||||
|
||||
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. */
|
||||
|
||||
|
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#include <linux/linkage.h>
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#ifdef __ARMEB__
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#define al r1
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#define ah r0
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#else
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#define al r0
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#define ah r1
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#endif
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ENTRY(__ashldi3)
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subs r3, r2, #32
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rsb ip, r2, #32
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movmi ah, ah, lsl r2
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movpl ah, al, lsl r3
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orrmi ah, ah, al, lsr ip
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mov al, al, lsl r2
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mov pc, lr
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@ -1,56 +0,0 @@
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/* More subroutines needed by GCC output code on some machines. */
|
||||
/* Compile this one with gcc. */
|
||||
/* Copyright (C) 1989, 92-98, 1999 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, 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
/* As a special exception, if you link this library with other files,
|
||||
some of which are compiled with GCC, to produce an executable,
|
||||
this library does not by itself cause the resulting executable
|
||||
to be covered by the GNU General Public License.
|
||||
This exception does not however invalidate any other reasons why
|
||||
the executable file might be covered by the GNU General Public License.
|
||||
*/
|
||||
/* support functions required by the kernel. based on code from gcc-2.95.3 */
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/* I Molton 29/07/01 */
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#include "gcclib.h"
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s64 __ashldi3(s64 u, int b)
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{
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DIunion w;
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int bm;
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DIunion uu;
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if (b == 0)
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return u;
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uu.ll = u;
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bm = (sizeof(s32) * BITS_PER_UNIT) - b;
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if (bm <= 0) {
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w.s.low = 0;
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w.s.high = (u32) uu.s.low << -bm;
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} else {
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u32 carries = (u32) uu.s.low >> bm;
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w.s.low = (u32) uu.s.low << b;
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w.s.high = ((u32) uu.s.high << b) | carries;
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}
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return w.ll;
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}
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48
arch/arm/lib/ashrdi3.S
Normal file
48
arch/arm/lib/ashrdi3.S
Normal file
@ -0,0 +1,48 @@
|
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/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
|
||||
Free Software Foundation, Inc.
|
||||
|
||||
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. */
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|
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#include <linux/linkage.h>
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#ifdef __ARMEB__
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#define al r1
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#define ah r0
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#else
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#define al r0
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#define ah r1
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#endif
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ENTRY(__ashrdi3)
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subs r3, r2, #32
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rsb ip, r2, #32
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movmi al, al, lsr r2
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movpl al, ah, asr r3
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orrmi al, al, ah, lsl ip
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mov ah, ah, asr r2
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mov pc, lr
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@ -1,57 +0,0 @@
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/* More subroutines needed by GCC output code on some machines. */
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/* Compile this one with gcc. */
|
||||
/* Copyright (C) 1989, 92-98, 1999 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, 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
/* As a special exception, if you link this library with other files,
|
||||
some of which are compiled with GCC, to produce an executable,
|
||||
this library does not by itself cause the resulting executable
|
||||
to be covered by the GNU General Public License.
|
||||
This exception does not however invalidate any other reasons why
|
||||
the executable file might be covered by the GNU General Public License.
|
||||
*/
|
||||
/* support functions required by the kernel. based on code from gcc-2.95.3 */
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/* I Molton 29/07/01 */
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#include "gcclib.h"
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s64 __ashrdi3(s64 u, int b)
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{
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DIunion w;
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int bm;
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DIunion uu;
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if (b == 0)
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return u;
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uu.ll = u;
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bm = (sizeof(s32) * BITS_PER_UNIT) - b;
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if (bm <= 0) {
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/* w.s.high = 1..1 or 0..0 */
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w.s.high = uu.s.high >> (sizeof(s32) * BITS_PER_UNIT - 1);
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w.s.low = uu.s.high >> -bm;
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} else {
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u32 carries = (u32) uu.s.high << bm;
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w.s.high = uu.s.high >> b;
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w.s.low = ((u32) uu.s.low >> b) | carries;
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}
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return w.ll;
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}
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@ -1,22 +0,0 @@
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/* gcclib.h -- definitions for various functions 'borrowed' from gcc-2.95.3 */
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/* I Molton 29/07/01 */
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#include <linux/types.h>
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#define BITS_PER_UNIT 8
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#define SI_TYPE_SIZE (sizeof(s32) * BITS_PER_UNIT)
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#ifdef __ARMEB__
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struct DIstruct {
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s32 high, low;
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};
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#else
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struct DIstruct {
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s32 low, high;
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};
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#endif
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typedef union {
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struct DIstruct s;
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s64 ll;
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} DIunion;
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48
arch/arm/lib/lshrdi3.S
Normal file
48
arch/arm/lib/lshrdi3.S
Normal file
@ -0,0 +1,48 @@
|
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/* Copyright 1995, 1996, 1998, 1999, 2000, 2003, 2004, 2005
|
||||
Free Software Foundation, Inc.
|
||||
|
||||
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. */
|
||||
|
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#include <linux/linkage.h>
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#ifdef __ARMEB__
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#define al r1
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#define ah r0
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#else
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#define al r0
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#define ah r1
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#endif
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ENTRY(__lshrdi3)
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subs r3, r2, #32
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rsb ip, r2, #32
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movmi al, al, lsr r2
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movpl al, ah, lsr r3
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orrmi al, al, ah, lsl ip
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mov ah, ah, lsr r2
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mov pc, lr
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|
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@ -1,56 +0,0 @@
|
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/* More subroutines needed by GCC output code on some machines. */
|
||||
/* Compile this one with gcc. */
|
||||
/* Copyright (C) 1989, 92-98, 1999 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, 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
/* As a special exception, if you link this library with other files,
|
||||
some of which are compiled with GCC, to produce an executable,
|
||||
this library does not by itself cause the resulting executable
|
||||
to be covered by the GNU General Public License.
|
||||
This exception does not however invalidate any other reasons why
|
||||
the executable file might be covered by the GNU General Public License.
|
||||
*/
|
||||
/* support functions required by the kernel. based on code from gcc-2.95.3 */
|
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/* I Molton 29/07/01 */
|
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|
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#include "gcclib.h"
|
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|
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s64 __lshrdi3(s64 u, int b)
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{
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DIunion w;
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int bm;
|
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DIunion uu;
|
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|
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if (b == 0)
|
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return u;
|
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|
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uu.ll = u;
|
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|
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bm = (sizeof(s32) * BITS_PER_UNIT) - b;
|
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if (bm <= 0) {
|
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w.s.high = 0;
|
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w.s.low = (u32) uu.s.high >> -bm;
|
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} else {
|
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u32 carries = (u32) uu.s.high << bm;
|
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w.s.high = (u32) uu.s.high >> b;
|
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w.s.low = ((u32) uu.s.low >> b) | carries;
|
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}
|
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|
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return w.ll;
|
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}
|
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44
arch/arm/lib/muldi3.S
Normal file
44
arch/arm/lib/muldi3.S
Normal file
@ -0,0 +1,44 @@
|
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/*
|
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* linux/arch/arm/lib/muldi3.S
|
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*
|
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* Author: Nicolas Pitre
|
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* Created: Oct 19, 2005
|
||||
* Copyright: Monta Vista Software, Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
|
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#ifdef __ARMEB__
|
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#define xh r0
|
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#define xl r1
|
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#define yh r2
|
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#define yl r3
|
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#else
|
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#define xl r0
|
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#define xh r1
|
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#define yl r2
|
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#define yh r3
|
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#endif
|
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|
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ENTRY(__muldi3)
|
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|
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mul xh, yl, xh
|
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mla xh, xl, yh, xh
|
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mov ip, xl, asr #16
|
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mov yh, yl, asr #16
|
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bic xl, xl, ip, lsl #16
|
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bic yl, yl, yh, lsl #16
|
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mla xh, yh, ip, xh
|
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mul yh, xl, yh
|
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mul xl, yl, xl
|
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mul ip, yl, ip
|
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adds xl, xl, yh, lsl #16
|
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adc xh, xh, yh, lsr #16
|
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adds xl, xl, ip, lsl #16
|
||||
adc xh, xh, ip, lsr #16
|
||||
mov pc, lr
|
||||
|
||||
@ -1,72 +0,0 @@
|
||||
/* More subroutines needed by GCC output code on some machines. */
|
||||
/* Compile this one with gcc. */
|
||||
/* Copyright (C) 1989, 92-98, 1999 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, 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
/* As a special exception, if you link this library with other files,
|
||||
some of which are compiled with GCC, to produce an executable,
|
||||
this library does not by itself cause the resulting executable
|
||||
to be covered by the GNU General Public License.
|
||||
This exception does not however invalidate any other reasons why
|
||||
the executable file might be covered by the GNU General Public License.
|
||||
*/
|
||||
/* support functions required by the kernel. based on code from gcc-2.95.3 */
|
||||
/* I Molton 29/07/01 */
|
||||
|
||||
#include "gcclib.h"
|
||||
|
||||
#define umul_ppmm(xh, xl, a, b) \
|
||||
{register u32 __t0, __t1, __t2; \
|
||||
__asm__ ("%@ Inlined umul_ppmm \n\
|
||||
mov %2, %5, lsr #16 \n\
|
||||
mov %0, %6, lsr #16 \n\
|
||||
bic %3, %5, %2, lsl #16 \n\
|
||||
bic %4, %6, %0, lsl #16 \n\
|
||||
mul %1, %3, %4 \n\
|
||||
mul %4, %2, %4 \n\
|
||||
mul %3, %0, %3 \n\
|
||||
mul %0, %2, %0 \n\
|
||||
adds %3, %4, %3 \n\
|
||||
addcs %0, %0, #65536 \n\
|
||||
adds %1, %1, %3, lsl #16 \n\
|
||||
adc %0, %0, %3, lsr #16" \
|
||||
: "=&r" ((u32) (xh)), \
|
||||
"=r" ((u32) (xl)), \
|
||||
"=&r" (__t0), "=&r" (__t1), "=r" (__t2) \
|
||||
: "r" ((u32) (a)), \
|
||||
"r" ((u32) (b)));}
|
||||
|
||||
#define __umulsidi3(u, v) \
|
||||
({DIunion __w; \
|
||||
umul_ppmm (__w.s.high, __w.s.low, u, v); \
|
||||
__w.ll; })
|
||||
|
||||
s64 __muldi3(s64 u, s64 v)
|
||||
{
|
||||
DIunion w;
|
||||
DIunion uu, vv;
|
||||
|
||||
uu.ll = u, vv.ll = v;
|
||||
|
||||
w.ll = __umulsidi3(uu.s.low, vv.s.low);
|
||||
w.s.high += ((u32) uu.s.low * (u32) vv.s.high
|
||||
+ (u32) uu.s.high * (u32) vv.s.low);
|
||||
|
||||
return w.ll;
|
||||
}
|
||||
35
arch/arm/lib/ucmpdi2.S
Normal file
35
arch/arm/lib/ucmpdi2.S
Normal file
@ -0,0 +1,35 @@
|
||||
/*
|
||||
* linux/arch/arm/lib/ucmpdi2.S
|
||||
*
|
||||
* Author: Nicolas Pitre
|
||||
* Created: Oct 19, 2005
|
||||
* Copyright: Monta Vista Software, Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/linkage.h>
|
||||
|
||||
#ifdef __ARMEB__
|
||||
#define xh r0
|
||||
#define xl r1
|
||||
#define yh r2
|
||||
#define yl r3
|
||||
#else
|
||||
#define xl r0
|
||||
#define xh r1
|
||||
#define yl r2
|
||||
#define yh r3
|
||||
#endif
|
||||
|
||||
ENTRY(__ucmpdi2)
|
||||
|
||||
cmp xh, yh
|
||||
cmpeq xl, yl
|
||||
movlo r0, #0
|
||||
moveq r0, #1
|
||||
movhi r0, #2
|
||||
mov pc, lr
|
||||
|
||||
@ -1,49 +0,0 @@
|
||||
/* More subroutines needed by GCC output code on some machines. */
|
||||
/* Compile this one with gcc. */
|
||||
/* Copyright (C) 1989, 92-98, 1999 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, 59 Temple Place - Suite 330,
|
||||
Boston, MA 02111-1307, USA. */
|
||||
|
||||
/* As a special exception, if you link this library with other files,
|
||||
some of which are compiled with GCC, to produce an executable,
|
||||
this library does not by itself cause the resulting executable
|
||||
to be covered by the GNU General Public License.
|
||||
This exception does not however invalidate any other reasons why
|
||||
the executable file might be covered by the GNU General Public License.
|
||||
*/
|
||||
/* support functions required by the kernel. based on code from gcc-2.95.3 */
|
||||
/* I Molton 29/07/01 */
|
||||
|
||||
#include "gcclib.h"
|
||||
|
||||
int __ucmpdi2(s64 a, s64 b)
|
||||
{
|
||||
DIunion au, bu;
|
||||
|
||||
au.ll = a, bu.ll = b;
|
||||
|
||||
if ((u32) au.s.high < (u32) bu.s.high)
|
||||
return 0;
|
||||
else if ((u32) au.s.high > (u32) bu.s.high)
|
||||
return 2;
|
||||
if ((u32) au.s.low < (u32) bu.s.low)
|
||||
return 0;
|
||||
else if ((u32) au.s.low > (u32) bu.s.low)
|
||||
return 2;
|
||||
return 1;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user