1
/* i80586 mul_1 -- Multiply a limb vector with a limb and store
2
* the result in a second limb vector.
4
* Copyright (C) 1992, 1994, 1996, 1998,
5
* 2001 Free Software Foundation, Inc.
7
* This file is part of GnuPG.
9
* GnuPG is free software; you can redistribute it and/or modify
10
* it under the terms of the GNU General Public License as published by
11
* the Free Software Foundation; either version 2 of the License, or
12
* (at your option) any later version.
14
* GnuPG is distributed in the hope that it will be useful,
15
* but WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17
* GNU General Public License for more details.
19
* You should have received a copy of the GNU General Public License
20
* along with this program; if not, write to the Free Software
21
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
23
* Note: This code is heavily based on the GNU MP Library.
24
* Actually it's the same code with only minor changes in the
25
* way the data is stored; this is to support the abstraction
26
* of an optional secure memory allocation which may be used
27
* to avoid revealing of sensitive data due to paging etc.
28
* The GNU MP Library itself is published under the LGPL;
29
* however I decided to publish this code under the plain GPL.
34
#include "asm-syntax.h"
39
* mpihelp_mul_1( mpi_ptr_t res_ptr, (sp + 4)
40
* mpi_ptr_t s1_ptr, (sp + 8)
41
* mpi_size_t s1_size, (sp + 12)
42
* mpi_limb_t s2_limb) (sp + 16)
52
GLOBL C_SYMBOL_NAME(mpihelp_mul_1)
53
C_SYMBOL_NAME(mpihelp_mul_1:)
60
INSN2(mov,l ,R(res_ptr),MEM_DISP(esp,20))
61
INSN2(mov,l ,R(s1_ptr),MEM_DISP(esp,24))
62
INSN2(mov,l ,R(size),MEM_DISP(esp,28))
63
INSN2(mov,l ,R(s2_limb),MEM_DISP(esp,32))
65
INSN2(lea,l ,R(res_ptr),MEM_INDEX(res_ptr,size,4))
66
INSN2(lea,l ,R(s1_ptr),MEM_INDEX(s1_ptr,size,4))
68
INSN2(xor,l ,R(ebx),R(ebx))
71
Loop: INSN2(adc,l ,R(ebx),$0)
72
INSN2(mov,l ,R(eax),MEM_INDEX(s1_ptr,size,4))
74
INSN1(mul,l ,R(s2_limb))
76
INSN2(add,l ,R(ebx),R(eax))
78
INSN2(mov,l ,MEM_INDEX(res_ptr,size,4),R(ebx))
81
INSN2(mov,l ,R(ebx),R(edx))
84
INSN2(adc,l ,R(ebx),$0)
85
INSN2(mov,l ,R(eax),R(ebx))