1/*
2 * Copyright (c) 1993 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
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24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <machine/asm.h>
32__FBSDID("$FreeBSD: head/lib/libc/i386/string/memcmp.S 93000 2002-03-23 02:44:19Z obrien $");
33
34/*
35 * memcmp (void *b1, void *b2, size_t len)
36 *
37 * Written by:
38 * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
39 */
40
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68 repe
69 cmpsb
70L6: movzbl -1(%edi),%eax /* Perform unsigned comparison */
71 movzbl -1(%esi),%edx
72 subl %edx,%eax
73 popl %esi
74 popl %edi
75 ret
2 * Copyright (c) 1993 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
--- 15 unchanged lines hidden (view full) ---
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <machine/asm.h>
32__FBSDID("$FreeBSD: head/lib/libc/i386/string/memcmp.S 93000 2002-03-23 02:44:19Z obrien $");
33
34/*
35 * memcmp (void *b1, void *b2, size_t len)
36 *
37 * Written by:
38 * J.T. Conklin (jtc@wimsey.com), Winning Strategies, Inc.
39 */
40
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68 repe
69 cmpsb
70L6: movzbl -1(%edi),%eax /* Perform unsigned comparison */
71 movzbl -1(%esi),%edx
72 subl %edx,%eax
73 popl %esi
74 popl %edi
75 ret