mpir/mpn/x86i/lshift.asm
brgladman 48248cda46 1. longlong.h change to add MSVC intrinsics
2. longlong.h rearrangement for Intel compiler
3. MSVC additions in test  code 
4. GMP 4.2.1 bug fixes
5. Intel format assembly code
2008-05-18 22:20:43 +00:00

87 lines
2.4 KiB
NASM

; Copyright 1992, 1994, 1996, 1999, 2000, 2001, 2002 Free Software
; Foundation, Inc.
;
; This file is part of the GNU MP Library.
;
; The GNU MP Library is free software; you can redistribute it and/or
; modify it under the terms of the GNU Lesser General Public License as
; published by the Free Software Foundation; either version 2.1 of the
; License, or (at your option) any later version.
;
; The GNU MP Library 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
; Lesser General Public License for more details.
;
; You should have received a copy of the GNU Lesser General Public
; License along with the GNU MP Library; see the file COPYING.LIB. If
; not, write to the Free Software Foundation, Inc., 59 Temple Place -
; Suite 330, Boston, MA 02111-1307, USA.
;
; Translation of AT&T syntax code by Brian Gladman
%include "x86i.inc"
%define PARAM_SHIFT esp+frame+16
%define PARAM_SIZE esp+frame+12
%define PARAM_SRC esp+frame+8
%define PARAM_DST esp+frame+4
section .text
global ___gmpn_lshift
%ifdef DLL
export ___gmpn_lshift
%endif
align 8
___gmpn_lshift:
push edi
push esi
push ebx
%assign frame frame+12
mov edi,[PARAM_DST]
mov esi,[PARAM_SRC]
mov edx,[PARAM_SIZE]
mov ecx,[PARAM_SHIFT]
sub esi,4 ; adjust src
mov ebx,[esi+edx*4] ; read most significant limb
xor eax,eax
shld eax,ebx,cl
dec edx
jz Lend
push eax ; push carry limb onto stack
test dl,1
jnz L1 ; enter Lop in the middle
mov eax,ebx
align 8
Lop:
mov ebx,[esi+edx*4] ; load next lower limb
shld eax,ebx,cl
mov [edi+edx*4],eax ; store it
dec edx
L1:
mov eax,[esi+edx*4]
shld ebx,eax,cl
mov [edi+edx*4],ebx
dec edx
jnz Lop
shl eax,cl ; compute least significant limb
mov [edi],eax ; store it
pop eax ; pop carry limb
pop ebx
pop esi
pop edi
ret
Lend:
shl ebx,cl ; compute least significant limb
mov [edi],ebx ; store it
pop ebx
pop esi
pop edi
ret
end