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-rw-r--r--mpi/i386/mpih-lshift.S96
1 files changed, 0 insertions, 96 deletions
diff --git a/mpi/i386/mpih-lshift.S b/mpi/i386/mpih-lshift.S
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--- a/mpi/i386/mpih-lshift.S
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-/* i80386 lshift
- * Copyright (C) 1992, 1994, 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
- *
- * Note: This code is heavily based on the GNU MP Library.
- * Actually it's the same code with only minor changes in the
- * way the data is stored; this is to support the abstraction
- * of an optional secure memory allocation which may be used
- * to avoid revealing of sensitive data due to paging etc.
- * The GNU MP Library itself is published under the LGPL;
- * however I decided to publish this code under the plain GPL.
- */
-
-
-#include "sysdep.h"
-#include "asm-syntax.h"
-
-
-/*******************
- * mpi_limb_t
- * mpihelp_lshift( mpi_ptr_t wp, (sp + 4)
- * mpi_ptr_t up, (sp + 8)
- * mpi_size_t usize, (sp + 12)
- * unsigned cnt) (sp + 16)
- */
-
-.text
- ALIGN (3)
- .globl C_SYMBOL_NAME(mpihelp_lshift)
-C_SYMBOL_NAME(mpihelp_lshift:)
- pushl %edi
- pushl %esi
- pushl %ebx
-
- movl 16(%esp),%edi /* res_ptr */
- movl 20(%esp),%esi /* s_ptr */
- movl 24(%esp),%edx /* size */
- movl 28(%esp),%ecx /* cnt */
-
- subl $4,%esi /* adjust s_ptr */
-
- movl (%esi,%edx,4),%ebx /* read most significant limb */
- xorl %eax,%eax
- shldl %ebx,%eax /* compute carry limb */
- decl %edx
- jz Lend
- pushl %eax /* push carry limb onto stack */
- testb $1,%dl
- jnz L1 /* enter loop in the middle */
- movl %ebx,%eax
-
- ALIGN (3)
-Loop: movl (%esi,%edx,4),%ebx /* load next lower limb */
- shldl %ebx,%eax /* compute result limb */
- movl %eax,(%edi,%edx,4) /* store it */
- decl %edx
-L1: movl (%esi,%edx,4),%eax
- shldl %eax,%ebx
- movl %ebx,(%edi,%edx,4)
- decl %edx
- jnz Loop
-
- shll %cl,%eax /* compute least significant limb */
- movl %eax,(%edi) /* store it */
-
- popl %eax /* pop carry limb */
-
- popl %ebx
- popl %esi
- popl %edi
- ret
-
-Lend: shll %cl,%ebx /* compute least significant limb */
- movl %ebx,(%edi) /* store it */
-
- popl %ebx
- popl %esi
- popl %edi
- ret
-