diff options
Diffstat (limited to 'lib/libc/i386/string/memcmp.S')
| -rw-r--r-- | lib/libc/i386/string/memcmp.S | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/lib/libc/i386/string/memcmp.S b/lib/libc/i386/string/memcmp.S deleted file mode 100644 index a362533..0000000 --- a/lib/libc/i386/string/memcmp.S +++ /dev/null @@ -1,81 +0,0 @@ -/* - * Copyright (c) 1993 Winning Strategies, Inc. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Winning Strategies, Inc. - * 4. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * $Id$ - */ - -#if defined(LIBC_RCS) && !defined(lint) - .text - .asciz "$Id$" -#endif /* LIBC_RCS and not lint */ - -#include "DEFS.h" - -/* - * memcmp (void *b1, void *b2, size_t len) - * - * Written by: - * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc. - */ - -ENTRY(memcmp) - pushl %edi - pushl %esi - movl 12(%esp),%edi - movl 16(%esp),%esi - cld /* set compare direction forward */ - - movl 20(%esp),%ecx /* compare by words */ - shrl $2,%ecx - repe - cmpsl - jne L5 /* do we match so far? */ - - movl 20(%esp),%ecx /* compare remainder by bytes */ - andl $3,%ecx - repe - cmpsb - jne L6 /* do we match? */ - - xorl %eax,%eax /* we match, return zero */ - popl %esi - popl %edi - ret - -L5: movl $4,%ecx /* We know that one of the next */ - subl %ecx,%edi /* four pairs of bytes do not */ - subl %ecx,%esi /* match. */ - repe - cmpsb -L6: movzbl -1(%edi),%eax /* Perform unsigned comparison */ - movzbl -1(%esi),%edx - subl %edx,%eax - popl %esi - popl %edi - ret |
