2 * This string-include defines all string functions as inline
3 * functions. Use gcc. It also assumes ds=es=data space, this should be
4 * normal. Most of the string-functions are rather heavily hand-optimized,
5 * see especially strtok,strstr,str[c]spn. They should work, but are not
6 * very easy to understand. Everything is done entirely within the register
7 * set, making the functions fast and clean. String instructions have been
8 * used through-out, making for "slightly" unclear code :-)
10 * NO Copyright (C) 1991, 1992 Linus Torvalds,
11 * consider these trivial functions to be PD.
15 * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
17 * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
21 * Modified for uClibc by Erik Andersen <andersen@codepoet.org>
22 * These make no attempt to use nifty things like mmx/3dnow/etc.
23 * These are not inline, and will therefore not be as fast as
24 * modifying the headers to use inlines (and cannot therefore
25 * do tricky things when dealing with const memory). But they
26 * should (I hope!) be faster than their generic equivalents....
28 * More importantly, these should provide a good example for
29 * others to follow when adding arch specific optimizations.
35 char *strrchr(const char *s, int c)
38 register char * __res;
45 "2:\ttestb %%al,%%al\n\t"
47 :"=g" (__res), "=&S" (d0), "=&a" (d1) :"0" (0),"1" (s),"2" (c));
50 libc_hidden_proto(strrchr)
51 libc_hidden_def(strrchr)
52 strong_alias(strrchr,rindex)