100 lines
2.4 KiB
NASM
100 lines
2.4 KiB
NASM
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; Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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;
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; This file is part of the GNU MP Library.
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;
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; The GNU MP Library is free software; you can redistribute it and/or
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; modify it under the terms of the GNU Lesser General Public License as
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; published by the Free Software Foundation; either version 2.1 of the
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; License, or (at your option) any later version.
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;
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; The GNU MP Library 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 GNU
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; Lesser General Public License for more details.
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;
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; You should have received a copy of the GNU Lesser General Public
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; License along with the GNU MP Library; see the file COPYING.LIB. If
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; not, write to the Free Software Foundation, Inc., 59 Temple Place -
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; Suite 330, Boston, MA 02111-1307, USA.
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;
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; Translation of AT&T syntax code by Brian Gladman
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%include "x86i.inc"
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%define PARAM_CARRY esp+frame+16
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%define PARAM_DIVISOR esp+frame+12
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%define PARAM_SIZE esp+frame+8
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%define PARAM_SRC esp+frame+4
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section .text
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global ___gmpn_mod_1c
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%ifdef DLL
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export ___gmpn_mod_1c
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%endif
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align 16
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___gmpn_mod_1c:
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%assign frame 0
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mov ecx,[PARAM_SIZE]
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FR_push ebx
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mov ebx,[PARAM_SRC]
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FR_push esi
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mov esi,[PARAM_DIVISOR]
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or ecx,ecx
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mov edx,[PARAM_CARRY]
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jnz Ltop
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pop esi
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mov eax,edx
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pop ebx
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ret
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global ___gmpn_mod_1
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%ifdef DLL
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export ___gmpn_mod_1
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%endif
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align 16
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___gmpn_mod_1:
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%assign frame 0
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mov ecx,[PARAM_SIZE]
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FR_push ebx
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mov ebx,[PARAM_SRC]
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FR_push esi
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or ecx,ecx
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jz Ldone_zero
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mov esi,[PARAM_DIVISOR]
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mov eax,[-4+ebx+ecx*4] ; src high limb
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cmp eax,esi
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sbb edx,edx ; -1 if high<divisor
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add ecx,edx ; skip one division if high<divisor
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jz Ldone_eax
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and edx,eax ; carry if high<divisor
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; eax scratch (quotient)
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; ebx src
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; ecx counter
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; edx carry (remainder)
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; esi divisor
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; edi
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; ebp
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Ltop:
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mov eax,[-4+ebx+ecx*4]
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div esi
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dec ecx
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jnz Ltop
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mov eax,edx
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Ldone_eax:
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pop esi
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pop ebx
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ret
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Ldone_zero:
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pop esi
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xor eax,eax
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pop ebx
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ret
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end
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