glibc/sysdeps/i386/i586/rshift.S
Ulrich Drepper ae828bc6f9 Update.
1998-03-02 17:55  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/add_n.S: Change to use ENTRY and END macro.
	* sysdeps/i386/addmul_1.S: Likewise.
	* sysdeps/i386/lshift.S: Likewise.
	* sysdeps/i386/mul_1.S: Likewise.
	* sysdeps/i386/rshift.S: Likewise.
	* sysdeps/i386/sub_n.S: Likewise.
	* sysdeps/i386/submul_1.S: Likewise.
	* sysdeps/i386/i586/add_n.S: Likewise.
	* sysdeps/i386/i586/addmul_1.S: Likewise.
	* sysdeps/i386/i586/lshift.S: Likewise.
	* sysdeps/i386/i586/mul_1.S: Likewise.
	* sysdeps/i386/i586/rshift.S: Likewise.
	* sysdeps/i386/i586/sub_n.S: Likewise.
	* sysdeps/i386/i586/submul_1.S: Likewise.

	* sysdeps/i386/sysdep.h: Extend last change.

	* sysdeps/unix/sysv/linux/i386/sysdep.h: Follow Intel's advice
	to have only one exit point for functions.

1998-03-02  Ulrich Drepper  <drepper@cygnus.com>

	* configure.in: Fix msgfmt test.  Fix handling of //s in sysdeps
	search.

1998-03-02 13:28  Ulrich Drepper  <drepper@cygnus.com>

	* Makerules: Generate libc.so with absolute paths for the used
	shared objects.

	* config.make.in: Add MAKEINFO definition.

1998-03-02  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/i386/sysdep.h (ASM_SIZE_DIRECTIVE): Add ; at the end.
	(ENTRY): Use STABS_FUN.
	(END): Use STABS_FUN_END.
	(STABS_FUN, STABS_FUN2, STABS_FUN_END): New macro to emit stabs info.

	* elf/Makefile: Add rules to build sprof program.
	* elf/sprof.c: New file.

1998-02-28  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* misc/syslog.c (openlog_internal): Insert missing closing brace.

1998-02-06  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* configure.in: Check for working msgfmt version (from GNU gettext
	0.10 or later).

1998-03-02  Ulrich Drepper  <drepper@cygnus.com>

	* configure.in: Avoid //s in sysdirs.
	Patch by Roland McGrath.

	* stdlib/a64l.c (a64l): Rewrite by Joe Keane <jgk@jgk.org>.

1998-03-02 07:17  H.J. Lu  <hjl@gnu.org>

	* elf/dl-open.c (_dl_open): Update _dl_global_scope_end when
	setting _dl_global_scope for RTLD_GLOBAL.

1998-02-27  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/make-syscalls.sh: Fix last change so that all
	possible lists of object-suffixes are taken care of.

1998-03-02 10:16  Ulrich Drepper  <drepper@cygnus.com>

	* timezone/private.h: Update from tzcode1998c.
	* timezone/zic.c: Likewise.
	* timezone/antarctica: Updated from tzdata1998c.
	* timezone/asia: Likewise.
	* timezone/australasia: Likewise.
	* timezone/europe: Likewise.
	* timezone/southamerica: Likewise.

1998-03-02  Ulrich Drepper  <drepper@cygnus.com>

	* posix/glob.c (glob_in_dir): Add support for cases insensitive
	VMS.  Patch by John W. Eaton <jwe@bevo.che.wisc.edu>.
1998-03-02 18:02:11 +00:00

221 lines
4.4 KiB
ArmAsm

/* Pentium optimized __mpn_rshift --
Copyright (C) 1992, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
The GNU MP Library 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
/*
INPUT PARAMETERS
res_ptr (sp + 4)
s_ptr (sp + 8)
size (sp + 12)
cnt (sp + 16)
*/
#include "sysdep.h"
#include "asm-syntax.h"
.text
ENTRY(__mpn_rshift)
pushl %edi
pushl %esi
pushl %ebx
pushl %ebp
movl 20(%esp),%edi /* res_ptr */
movl 24(%esp),%esi /* s_ptr */
movl 28(%esp),%ebp /* size */
movl 32(%esp),%ecx /* cnt */
/* We can use faster code for shift-by-1 under certain conditions. */
cmp $1,%ecx
jne L(normal)
leal 4(%edi),%eax
cmpl %esi,%eax
jnc L(special) /* jump if res_ptr + 1 >= s_ptr */
leal (%edi,%ebp,4),%eax
cmpl %eax,%esi
jnc L(special) /* jump if s_ptr >= res_ptr + size */
L(normal):
movl (%esi),%edx
addl $4,%esi
xorl %eax,%eax
shrdl %cl,%edx,%eax /* compute carry limb */
pushl %eax /* push carry limb onto stack */
decl %ebp
pushl %ebp
shrl $3,%ebp
jz L(end)
movl (%edi),%eax /* fetch destination cache line */
ALIGN (2)
L(oop): movl 28(%edi),%eax /* fetch destination cache line */
movl %edx,%ebx
movl (%esi),%eax
movl 4(%esi),%edx
shrdl %cl,%eax,%ebx
shrdl %cl,%edx,%eax
movl %ebx,(%edi)
movl %eax,4(%edi)
movl 8(%esi),%ebx
movl 12(%esi),%eax
shrdl %cl,%ebx,%edx
shrdl %cl,%eax,%ebx
movl %edx,8(%edi)
movl %ebx,12(%edi)
movl 16(%esi),%edx
movl 20(%esi),%ebx
shrdl %cl,%edx,%eax
shrdl %cl,%ebx,%edx
movl %eax,16(%edi)
movl %edx,20(%edi)
movl 24(%esi),%eax
movl 28(%esi),%edx
shrdl %cl,%eax,%ebx
shrdl %cl,%edx,%eax
movl %ebx,24(%edi)
movl %eax,28(%edi)
addl $32,%esi
addl $32,%edi
decl %ebp
jnz L(oop)
L(end): popl %ebp
andl $7,%ebp
jz L(end2)
L(oop2):
movl (%esi),%eax
shrdl %cl,%eax,%edx /* compute result limb */
movl %edx,(%edi)
movl %eax,%edx
addl $4,%esi
addl $4,%edi
decl %ebp
jnz L(oop2)
L(end2):
shrl %cl,%edx /* compute most significant limb */
movl %edx,(%edi) /* store it */
popl %eax /* pop carry limb */
popl %ebp
popl %ebx
popl %esi
popl %edi
ret
/* We loop from least significant end of the arrays, which is only
permissible if the source and destination don't overlap, since the
function is documented to work for overlapping source and destination.
*/
L(special):
leal -4(%edi,%ebp,4),%edi
leal -4(%esi,%ebp,4),%esi
movl (%esi),%edx
subl $4,%esi
decl %ebp
pushl %ebp
shrl $3,%ebp
shrl $1,%edx
incl %ebp
decl %ebp
jz L(Lend)
movl (%edi),%eax /* fetch destination cache line */
ALIGN (2)
L(Loop):
movl -28(%edi),%eax /* fetch destination cache line */
movl %edx,%ebx
movl (%esi),%eax
movl -4(%esi),%edx
rcrl $1,%eax
movl %ebx,(%edi)
rcrl $1,%edx
movl %eax,-4(%edi)
movl -8(%esi),%ebx
movl -12(%esi),%eax
rcrl $1,%ebx
movl %edx,-8(%edi)
rcrl $1,%eax
movl %ebx,-12(%edi)
movl -16(%esi),%edx
movl -20(%esi),%ebx
rcrl $1,%edx
movl %eax,-16(%edi)
rcrl $1,%ebx
movl %edx,-20(%edi)
movl -24(%esi),%eax
movl -28(%esi),%edx
rcrl $1,%eax
movl %ebx,-24(%edi)
rcrl $1,%edx
movl %eax,-28(%edi)
leal -32(%esi),%esi /* use leal not to clobber carry */
leal -32(%edi),%edi
decl %ebp
jnz L(Loop)
L(Lend):
popl %ebp
sbbl %eax,%eax /* save carry in %eax */
andl $7,%ebp
jz L(Lend2)
addl %eax,%eax /* restore carry from eax */
L(Loop2):
movl %edx,%ebx
movl (%esi),%edx
rcrl $1,%edx
movl %ebx,(%edi)
leal -4(%esi),%esi /* use leal not to clobber carry */
leal -4(%edi),%edi
decl %ebp
jnz L(Loop2)
jmp L(L1)
L(Lend2):
addl %eax,%eax /* restore carry from eax */
L(L1): movl %edx,(%edi) /* store last limb */
movl $0,%eax
rcrl $1,%eax
popl %ebp
popl %ebx
popl %esi
popl %edi
ret
END(__mpn_rshift)