mirror of
git://git.gnupg.org/gnupg.git
synced 2024-08-21 10:27:54 +02:00
136 lines
2.7 KiB
ArmAsm
136 lines
2.7 KiB
ArmAsm
![]() |
/* i80586 add_n -- Add two limb vectors of the same length > 0 and store
|
||
|
* sum in a third limb vector.
|
||
|
*
|
||
|
* Copyright (C) 1992, 1994, 1995, 1996, 1998,
|
||
|
* 2001 Free Software Foundation, Inc.
|
||
|
*
|
||
|
* This file is part of GnuPG.
|
||
|
*
|
||
|
* GnuPG 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 of the License, or
|
||
|
* (at your option) any later version.
|
||
|
*
|
||
|
* GnuPG 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; if not, write to the Free Software
|
||
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
||
|
*/
|
||
|
|
||
|
|
||
|
#include "sysdep.h"
|
||
|
#include "asm-syntax.h"
|
||
|
|
||
|
|
||
|
/*******************
|
||
|
* mpi_limb_t
|
||
|
* mpihelp_add_n( mpi_ptr_t res_ptr, (sp + 4)
|
||
|
* mpi_ptr_t s1_ptr, (sp + 8)
|
||
|
* mpi_ptr_t s2_ptr, (sp + 12)
|
||
|
* mpi_size_t size) (sp + 16)
|
||
|
*/
|
||
|
|
||
|
.text
|
||
|
ALIGN (3)
|
||
|
.globl C_SYMBOL_NAME(mpihelp_add_n)
|
||
|
C_SYMBOL_NAME(mpihelp_add_n:)
|
||
|
pushl %edi
|
||
|
pushl %esi
|
||
|
pushl %ebx
|
||
|
pushl %ebp
|
||
|
|
||
|
movl 20(%esp),%edi /* res_ptr */
|
||
|
movl 24(%esp),%esi /* s1_ptr */
|
||
|
movl 28(%esp),%ebp /* s2_ptr */
|
||
|
movl 32(%esp),%ecx /* size */
|
||
|
|
||
|
movl (%ebp),%ebx
|
||
|
|
||
|
decl %ecx
|
||
|
movl %ecx,%edx
|
||
|
shrl $3,%ecx
|
||
|
andl $7,%edx
|
||
|
testl %ecx,%ecx /* zero carry flag */
|
||
|
jz Lend
|
||
|
pushl %edx
|
||
|
|
||
|
ALIGN (3)
|
||
|
Loop: movl 28(%edi),%eax /* fetch destination cache line */
|
||
|
leal 32(%edi),%edi
|
||
|
|
||
|
L1: movl (%esi),%eax
|
||
|
movl 4(%esi),%edx
|
||
|
adcl %ebx,%eax
|
||
|
movl 4(%ebp),%ebx
|
||
|
adcl %ebx,%edx
|
||
|
movl 8(%ebp),%ebx
|
||
|
movl %eax,-32(%edi)
|
||
|
movl %edx,-28(%edi)
|
||
|
|
||
|
L2: movl 8(%esi),%eax
|
||
|
movl 12(%esi),%edx
|
||
|
adcl %ebx,%eax
|
||
|
movl 12(%ebp),%ebx
|
||
|
adcl %ebx,%edx
|
||
|
movl 16(%ebp),%ebx
|
||
|
movl %eax,-24(%edi)
|
||
|
movl %edx,-20(%edi)
|
||
|
|
||
|
L3: movl 16(%esi),%eax
|
||
|
movl 20(%esi),%edx
|
||
|
adcl %ebx,%eax
|
||
|
movl 20(%ebp),%ebx
|
||
|
adcl %ebx,%edx
|
||
|
movl 24(%ebp),%ebx
|
||
|
movl %eax,-16(%edi)
|
||
|
movl %edx,-12(%edi)
|
||
|
|
||
|
L4: movl 24(%esi),%eax
|
||
|
movl 28(%esi),%edx
|
||
|
adcl %ebx,%eax
|
||
|
movl 28(%ebp),%ebx
|
||
|
adcl %ebx,%edx
|
||
|
movl 32(%ebp),%ebx
|
||
|
movl %eax,-8(%edi)
|
||
|
movl %edx,-4(%edi)
|
||
|
|
||
|
leal 32(%esi),%esi
|
||
|
leal 32(%ebp),%ebp
|
||
|
decl %ecx
|
||
|
jnz Loop
|
||
|
|
||
|
popl %edx
|
||
|
Lend:
|
||
|
decl %edx /* test %edx w/o clobbering carry */
|
||
|
js Lend2
|
||
|
incl %edx
|
||
|
Loop2:
|
||
|
leal 4(%edi),%edi
|
||
|
movl (%esi),%eax
|
||
|
adcl %ebx,%eax
|
||
|
movl 4(%ebp),%ebx
|
||
|
movl %eax,-4(%edi)
|
||
|
leal 4(%esi),%esi
|
||
|
leal 4(%ebp),%ebp
|
||
|
decl %edx
|
||
|
jnz Loop2
|
||
|
Lend2:
|
||
|
movl (%esi),%eax
|
||
|
adcl %ebx,%eax
|
||
|
movl %eax,(%edi)
|
||
|
|
||
|
sbbl %eax,%eax
|
||
|
negl %eax
|
||
|
|
||
|
popl %ebp
|
||
|
popl %ebx
|
||
|
popl %esi
|
||
|
popl %edi
|
||
|
ret
|
||
|
|
||
|
|