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73 lines
1.8 KiB
NASM
73 lines
1.8 KiB
NASM
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; i80586 submul_1 -- Multiply a limb vector with a limb and add
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; the result to a second limb vector.
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;
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; Copyright (C) 1992, 1994, 1995, 1996, 1998,
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; 2001 Free Software Foundation, Inc.
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;
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; This file is part of GnuPG.
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;
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; GnuPG is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 2 of the License, or
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; (at your option) any later version.
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;
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; GnuPG is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; if not, write to the Free Software
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; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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;
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; Modified versions of the GPG i586 assembler for use with NASM. This
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; file is part of a native port of Gnu PG for use with Microsoft Visual
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; Studio .net. Ported by Brian Gladman <brg@gladman.uk.net> March 2002.
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global _mpihelp_submul_1
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%define res_ptr edi
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%define s1_ptr esi
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%define size ecx
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%define s2_limb ebp
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section .text
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align 8
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_mpihelp_submul_1:
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push edi
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push esi
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push ebx
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push ebp
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mov res_ptr,[esp+20]
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mov s1_ptr,[esp+24]
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mov size,[esp+28]
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mov s2_limb,[esp+32]
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lea res_ptr,[res_ptr+size*4]
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lea s1_ptr,[s1_ptr+size*4]
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neg size
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xor ebx,ebx
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align 8
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.1: adc ebx,0
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mov eax,[s1_ptr+size*4]
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mul s2_limb
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add eax,ebx
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mov ebx,[res_ptr+size*4]
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adc edx,0
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sub ebx,eax
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mov [res_ptr+size*4],ebx
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inc size
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mov ebx,edx
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jnz short .1
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adc ebx,0
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mov eax,ebx
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pop ebp
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pop ebx
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pop esi
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pop edi
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ret
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end
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