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- /*
- * This string-include defines all string functions as inline
- * functions. Use gcc. It also assumes ds=es=data space, this should be
- * normal. Most of the string-functions are rather heavily hand-optimized,
- * see especially strtok,strstr,str[c]spn. They should work, but are not
- * very easy to understand. Everything is done entirely within the register
- * set, making the functions fast and clean. String instructions have been
- * used through-out, making for "slightly" unclear code :-)
- *
- * NO Copyright (C) 1991, 1992 Linus Torvalds,
- * consider these trivial functions to be PD.
- */
- /*
- * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- /*
- * Modified for uClibc by Erik Andersen <andersen@codepoet.org>
- * These make no attempt to use nifty things like mmx/3dnow/etc.
- * These are not inline, and will therefore not be as fast as
- * modifying the headers to use inlines (and cannot therefore
- * do tricky things when dealing with const memory). But they
- * should (I hope!) be faster than their generic equivalents....
- *
- * More importantly, these should provide a good example for
- * others to follow when adding arch specific optimizations.
- * -Erik
- */
- #include <string.h>
- char *strrchr(const char *s, int c)
- {
- char *eax;
- __asm__ __volatile__(
- " movb %%cl, %%ch\n"
- "1: movb (%1), %%cl\n" /* load char */
- " cmpb %%cl, %%ch\n" /* char == c? */
- " jne 2f\n"
- " movl %1, %%eax\n"
- "2: incl %1\n"
- " testb %%cl, %%cl\n" /* char == NUL? */
- " jnz 1b\n"
- /* "=c": use ecx, not ebx (-fpic uses it). */
- : "=a" (eax), "=r" (s), "=c" (c)
- : "0" (0), "1" (s), "2" (c)
- /* : no clobbers */
- );
- return eax;
- }
- libc_hidden_def(strrchr)
- #ifdef __UCLIBC_SUSV3_LEGACY__
- strong_alias(strrchr,rindex)
- #endif
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