diff options
Diffstat (limited to 'sysdeps/i386/i586/memcpy.S')
| -rw-r--r-- | sysdeps/i386/i586/memcpy.S | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/sysdeps/i386/i586/memcpy.S b/sysdeps/i386/i586/memcpy.S deleted file mode 100644 index 6474a3f653..0000000000 --- a/sysdeps/i386/i586/memcpy.S +++ /dev/null @@ -1,124 +0,0 @@ -/* Highly optimized version for i586. - Copyright (C) 1997-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C 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 C 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 C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include "asm-syntax.h" - -#define PARMS 4+8 /* space for 2 saved regs */ -#define RTN PARMS -#define DEST RTN -#define SRC DEST+4 -#define LEN SRC+4 - - .text -#if defined PIC && IS_IN (libc) -ENTRY (__memcpy_chk) - movl 12(%esp), %eax - cmpl %eax, 16(%esp) - jb HIDDEN_JUMPTARGET (__chk_fail) -END (__memcpy_chk) -#endif -ENTRY (memcpy) - - pushl %edi - cfi_adjust_cfa_offset (4) - pushl %esi - cfi_adjust_cfa_offset (4) - - movl DEST(%esp), %edi - cfi_rel_offset (edi, 4) - movl SRC(%esp), %esi - cfi_rel_offset (esi, 0) - movl LEN(%esp), %ecx - movl %edi, %eax - - /* We need this in any case. */ - cld - - /* Cutoff for the big loop is a size of 32 bytes since otherwise - the loop will never be entered. */ - cmpl $32, %ecx - jbe L(1) - - negl %eax - andl $3, %eax - subl %eax, %ecx - xchgl %eax, %ecx - - rep; movsb - - movl %eax, %ecx - subl $32, %ecx - js L(2) - - /* Read ahead to make sure we write in the cache since the stupid - i586 designers haven't implemented read-on-write-miss. */ - movl (%edi), %eax -L(3): movl 28(%edi), %edx - - /* Now correct the loop counter. Please note that in the following - code the flags are not changed anymore. */ - subl $32, %ecx - - movl (%esi), %eax - movl 4(%esi), %edx - movl %eax, (%edi) - movl %edx, 4(%edi) - movl 8(%esi), %eax - movl 12(%esi), %edx - movl %eax, 8(%edi) - movl %edx, 12(%edi) - movl 16(%esi), %eax - movl 20(%esi), %edx - movl %eax, 16(%edi) - movl %edx, 20(%edi) - movl 24(%esi), %eax - movl 28(%esi), %edx - movl %eax, 24(%edi) - movl %edx, 28(%edi) - - leal 32(%esi), %esi - leal 32(%edi), %edi - - jns L(3) - - /* Correct extra loop counter modification. */ -L(2): addl $32, %ecx -#ifndef USE_AS_MEMPCPY - movl DEST(%esp), %eax -#endif - -L(1): rep; movsb - -#ifdef USE_AS_MEMPCPY - movl %edi, %eax -#endif - - popl %esi - cfi_adjust_cfa_offset (-4) - cfi_restore (esi) - popl %edi - cfi_adjust_cfa_offset (-4) - cfi_restore (edi) - - ret -END (memcpy) -#ifndef USE_AS_MEMPCPY -libc_hidden_builtin_def (memcpy) -#endif |