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/strchr.S 184548 2008-11-02 01:28:47Z peter $");
33
34/*
35 * strchr(s, c)
36 * return a pointer to the first occurance of the character c in
37 * string s, or NULL if c does not occur in the string.
38 *
39 * %edx - pointer iterating through string
40 * %eax - pointer to first occurance of 'c'
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56 je L2
57 incl %eax
58 testb %bl,%bl /* null terminator??? */
59 jne L1
60 xorl %eax,%eax
61L2:
62 popl %ebx
63 ret
64END(strchr)
2 * Copyright (c) 1993 Winning Strategies, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
--- 15 unchanged lines hidden (view full) ---
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <machine/asm.h>
32__FBSDID("$FreeBSD: head/lib/libc/i386/string/strchr.S 184548 2008-11-02 01:28:47Z peter $");
33
34/*
35 * strchr(s, c)
36 * return a pointer to the first occurance of the character c in
37 * string s, or NULL if c does not occur in the string.
38 *
39 * %edx - pointer iterating through string
40 * %eax - pointer to first occurance of 'c'
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56 je L2
57 incl %eax
58 testb %bl,%bl /* null terminator??? */
59 jne L1
60 xorl %eax,%eax
61L2:
62 popl %ebx
63 ret
64END(strchr)