glibc/sysdeps/i386/sub_n.S
Ulrich Drepper ce37fa887b Update.
1997-06-14 00:39  Ulrich Drepper  <drepper@cygnus.com>

	* libc.map: Add more libio functions which are used in libio.h.

	* login/Makefile (libutil-routines): Move updwtmp to ...
	(routines): ...here.
	Suggested by Mark Kettenis <kettenis@phys.uva.nl>.

	* sysdeps/stub/s_erfl.c: Add stub definition of erfcl.
	Reported by Andreas Jaeger <aj@arthur.rhein-neckar.de>.

1997-06-13 21:10  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>

	* nis/nis_add.c (nis_add): Create object name only if not set.

	* nis/nis_clone.c: Use calloc instead of malloc to prevent
	RPC encode errors.

	* nis/nis_modify.c (nis_modify): Create default object entrys if
	given are NULL.
	* nis/nis/nis_table.c (nis_add_entry, nis_modify_entry): Likewise.

1997-06-13 14:17  Andreas Jaeger  <aj@arthur.rhein-neckar.de>


	* sysdeps/i386/addmul_1.S: Replace size with sizeP, otherwise the
	define might also replace the expanded macro ASM_SIZE_DIRECTIVE.
	* sysdeps/i386/submul_1.S: Likewise.

1997-06-13 12:19  Ulrich Drepper  <drepper@cygnus.com>

	* elf/rtld.c: Print version information if LD_TRACE_LOADED_OBJECT
	and LD_VERBOSE are given.

	* elf/ldd.sh.in: Add -v|--verbose option.  Add author information
	as per Coding Standard.
	* elf/ldd.bash.in: Likewise.

1997-06-12 21:22  Ulrich Drepper  <drepper@cygnus.com>
1997-06-13 22:46:42 +00:00

108 lines
2.9 KiB
ArmAsm

/* i80386 __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
sum in a third limb vector.
Copyright (C) 1992, 1994, 1995, 1997 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)
s1_ptr (sp + 8)
s2_ptr (sp + 12)
size (sp + 16)
*/
#include "sysdep.h"
#include "asm-syntax.h"
.text
ALIGN (3)
.globl C_SYMBOL_NAME(__mpn_sub_n)
ASM_TYPE_DIRECTIVE(C_SYMBOL_NAME(__mpn_sub_n),@function)
C_SYMBOL_NAME(__mpn_sub_n:)
pushl %edi
pushl %esi
movl 12(%esp),%edi /* res_ptr */
movl 16(%esp),%esi /* s1_ptr */
movl 20(%esp),%edx /* s2_ptr */
movl 24(%esp),%ecx /* size */
movl %ecx,%eax
shrl $3,%ecx /* compute count for unrolled loop */
negl %eax
andl $7,%eax /* get index where to start loop */
jz L(oop) /* necessary special case for 0 */
incl %ecx /* adjust loop count */
shll $2,%eax /* adjustment for pointers... */
subl %eax,%edi /* ... since they are offset ... */
subl %eax,%esi /* ... by a constant when we ... */
subl %eax,%edx /* ... enter the loop */
shrl $2,%eax /* restore previous value */
#ifdef PIC
/* Calculate start address in loop for PIC. Due to limitations in some
assemblers, Loop-L0-3 cannot be put into the leal */
call L(0)
L(0): leal (%eax,%eax,8),%eax
addl (%esp),%eax
addl $(L(oop)-L(0)-3),%eax
addl $4,%esp
#else
/* Calculate start address in loop for non-PIC. */
leal (L(oop) - 3)(%eax,%eax,8),%eax
#endif
jmp *%eax /* jump into loop */
ALIGN (3)
L(oop): movl (%esi),%eax
sbbl (%edx),%eax
movl %eax,(%edi)
movl 4(%esi),%eax
sbbl 4(%edx),%eax
movl %eax,4(%edi)
movl 8(%esi),%eax
sbbl 8(%edx),%eax
movl %eax,8(%edi)
movl 12(%esi),%eax
sbbl 12(%edx),%eax
movl %eax,12(%edi)
movl 16(%esi),%eax
sbbl 16(%edx),%eax
movl %eax,16(%edi)
movl 20(%esi),%eax
sbbl 20(%edx),%eax
movl %eax,20(%edi)
movl 24(%esi),%eax
sbbl 24(%edx),%eax
movl %eax,24(%edi)
movl 28(%esi),%eax
sbbl 28(%edx),%eax
movl %eax,28(%edi)
leal 32(%edi),%edi
leal 32(%esi),%esi
leal 32(%edx),%edx
decl %ecx
jnz L(oop)
sbbl %eax,%eax
negl %eax
popl %esi
popl %edi
ret
ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(__mpn_sub_n))