mirror of
git://git.gnupg.org/gnupg.git
synced 2024-11-04 20:38:50 +01:00
87 lines
2.5 KiB
ArmAsm
87 lines
2.5 KiB
ArmAsm
/* i80386 mul_1 -- Multiply a limb vector with a limb and store
|
|
* the result in a second limb vector.
|
|
* Copyright (C) 1992, 1994, 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
|
|
*
|
|
* Note: This code is heavily based on the GNU MP Library.
|
|
* Actually it's the same code with only minor changes in the
|
|
* way the data is stored; this is to support the abstraction
|
|
* of an optional secure memory allocation which may be used
|
|
* to avoid revealing of sensitive data due to paging etc.
|
|
* The GNU MP Library itself is published under the LGPL;
|
|
* however I decided to publish this code under the plain GPL.
|
|
*/
|
|
|
|
|
|
#include "sysdep.h"
|
|
#include "asm-syntax.h"
|
|
|
|
|
|
/*******************
|
|
* mpi_limb_t
|
|
* mpihelp_mul_1( mpi_ptr_t res_ptr, (sp + 4)
|
|
* mpi_ptr_t s1_ptr, (sp + 8)
|
|
* mpi_size_t s1_size, (sp + 12)
|
|
* mpi_limb_t s2_limb) (sp + 16)
|
|
*/
|
|
|
|
#define res_ptr edi
|
|
#define s1_ptr esi
|
|
#define size ecx
|
|
#define s2_limb ebp
|
|
|
|
TEXT
|
|
ALIGN (3)
|
|
GLOBL C_SYMBOL_NAME(mpihelp_mul_1)
|
|
C_SYMBOL_NAME(mpihelp_mul_1:)
|
|
|
|
INSN1(push,l ,R(edi))
|
|
INSN1(push,l ,R(esi))
|
|
INSN1(push,l ,R(ebx))
|
|
INSN1(push,l ,R(ebp))
|
|
|
|
INSN2(mov,l ,R(res_ptr),MEM_DISP(esp,20))
|
|
INSN2(mov,l ,R(s1_ptr),MEM_DISP(esp,24))
|
|
INSN2(mov,l ,R(size),MEM_DISP(esp,28))
|
|
INSN2(mov,l ,R(s2_limb),MEM_DISP(esp,32))
|
|
|
|
INSN2(lea,l ,R(res_ptr),MEM_INDEX(res_ptr,size,4))
|
|
INSN2(lea,l ,R(s1_ptr),MEM_INDEX(s1_ptr,size,4))
|
|
INSN1(neg,l ,R(size))
|
|
INSN2(xor,l ,R(ebx),R(ebx))
|
|
ALIGN (3)
|
|
Loop:
|
|
INSN2(mov,l ,R(eax),MEM_INDEX(s1_ptr,size,4))
|
|
INSN1(mul,l ,R(s2_limb))
|
|
INSN2(add,l ,R(eax),R(ebx))
|
|
INSN2(mov,l ,MEM_INDEX(res_ptr,size,4),R(eax))
|
|
INSN2(adc,l ,R(edx),$0)
|
|
INSN2(mov,l ,R(ebx),R(edx))
|
|
|
|
INSN1(inc,l ,R(size))
|
|
INSN1(jnz, ,Loop)
|
|
INSN2(mov,l ,R(eax),R(ebx))
|
|
|
|
INSN1(pop,l ,R(ebp))
|
|
INSN1(pop,l ,R(ebx))
|
|
INSN1(pop,l ,R(esi))
|
|
INSN1(pop,l ,R(edi))
|
|
ret
|
|
|