2 * Copyright (c) 2003 Tim J. Robbins.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <machine/asm.h>
28 __FBSDID("$FreeBSD$");
32 * wmemchr(const wchar_t *buf, wchar_t c, size_t n) --
33 * Search the wide character array `buf', which has length `n',
34 * the character `c', return a pointer to it if found, or NULL on
40 movl 12(%esp),%edi /* Buffer */
41 movl 16(%esp),%eax /* Wide character */
42 movl 20(%esp),%ecx /* Length of buffer */
45 * Search in chunks of 8 wide characters (32 bytes).
51 bigloop:cmpl %eax,(%edi)
75 found4: leal 4(%edi),%edi
77 found8: leal 8(%edi),%edi
79 found12:leal 12(%edi),%edi
81 found16:leal 16(%edi),%edi
83 found20:leal 20(%edi),%edi
85 found24:leal 24(%edi),%edi
87 found28:leal 28(%edi),%edi
91 * Search remaining part of string.
97 smltop: cmpl %eax,(%edi)