diff options
Diffstat (limited to 'scripts/conf-w32brg/nasm586/mpih-rshift.asm')
| -rw-r--r-- | scripts/conf-w32brg/nasm586/mpih-rshift.asm | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/scripts/conf-w32brg/nasm586/mpih-rshift.asm b/scripts/conf-w32brg/nasm586/mpih-rshift.asm new file mode 100644 index 000000000..c39e87013 --- /dev/null +++ b/scripts/conf-w32brg/nasm586/mpih-rshift.asm @@ -0,0 +1,187 @@ + +; i80586 rshift +; +; Copyright (C) 1992, 1994, 1995, 1996, 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 +; +; Modified versions of the GPG i586 assembler for use with NASM. This +; file is part of a native port of Gnu PG for use with Microsoft Visual +; Studio .net. Ported by Brian Gladman <[email protected]> March 2002. + + global _mpihelp_rshift + + section .text + align 8 + +_mpihelp_rshift: + push edi + push esi + push ebx + push ebp + mov edi,[20+esp] + mov esi,[24+esp] + mov ebp,[28+esp] + mov ecx,[32+esp] + cmp ecx,1 + jne short .1 + lea eax,[4+edi] + cmp eax,esi + jnc .6 + lea eax,[edi+ebp*4] + cmp esi,eax + jnc .6 +.1: + mov edx,[esi] + add esi,4 + xor eax,eax + shrd eax,edx,cl + push eax + dec ebp + push ebp + shr ebp,3 + jz short .3 + mov eax, [edi] + + align 4 +.2: mov eax,[28+edi] + mov ebx,edx + mov eax,[esi] + mov edx,[4+esi] + shrd ebx,eax,cl + shrd eax,edx,cl + mov [edi],ebx + mov [4+edi],eax + mov ebx,[8+esi] + mov eax,[12+esi] + shrd edx,ebx,cl + shrd ebx,eax,cl + mov [8+edi],edx + mov [12+edi],ebx + mov edx,[16+esi] + mov ebx,[20+esi] + shrd eax,edx,cl + shrd edx,ebx,cl + mov [16+edi],eax + mov [20+edi],edx + mov eax,[24+esi] + mov edx,[28+esi] + shrd ebx,eax,cl + shrd eax,edx,cl + mov [24+edi],ebx + mov [28+edi],eax + add esi,32 + add edi,32 + dec ebp + jnz short .2 +.3: pop ebp + and ebp,7 + jz .5 +.4: + mov eax,[esi] + shrd edx,eax,cl + mov [edi],edx + mov edx,eax + add esi,4 + add edi,4 + dec ebp + jnz short .4 + +.5: shr edx,cl + mov [edi],edx + pop eax + pop ebp + pop ebx + pop esi + pop edi + ret + +.6: + lea edi,[-4+edi+ebp*4] + lea esi,[-4+esi+ebp*4] + mov edx,[esi] + sub esi,4 + dec ebp + push ebp + shr ebp,3 + shr edx,1 + inc ebp + dec ebp + jz short .8 + mov eax, [edi] + + align 4 +.7: mov eax,[-28+edi] + mov ebx,edx + mov eax,[esi] + mov edx,[-4+esi] + rcr eax,1 + mov [edi],ebx + rcr edx,1 + mov [-4+edi],eax + mov ebx,[-8+esi] + mov eax,[-12+esi] + rcr ebx,1 + mov [-8+edi],edx + rcr eax,1 + mov [-12+edi],ebx + mov edx,[-16+esi] + mov ebx,[-20+esi] + rcr edx,1 + mov [-16+edi],eax + rcr ebx,1 + mov [-20+edi],edx + mov eax,[-24+esi] + mov edx,[-28+esi] + rcr eax,1 + mov [-24+edi],ebx + rcr edx,1 + mov [-28+edi],eax + lea esi,[-32+esi] + lea edi,[-32+edi] + dec ebp + jnz short .7 + +.8: + pop ebp + sbb eax,eax + and ebp,7 + jz .10 + add eax,eax +.9: + mov ebx,edx + mov edx,[esi] + rcr edx,1 + mov [edi],ebx + lea esi,[-4+esi] + lea edi,[-4+edi] + dec ebp + jnz short .9 + jmp short .11 + +.10:add eax,eax +.11:mov [edi],edx + mov eax,0 + rcr eax,1 + pop ebp + pop ebx + pop esi + pop edi + ret + + end |