/* * 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> libc_hidden_proto(strrchr) char *strrchr(const char *s, int c) { int d0, d1; register char * __res; __asm__ __volatile__( "movb %%al,%%ah\n" "1:\tlodsb\n\t" "cmpb %%ah,%%al\n\t" "jne 2f\n\t" "leal -1(%%esi),%0\n" "2:\ttestb %%al,%%al\n\t" "jne 1b" :"=g" (__res), "=&S" (d0), "=&a" (d1) :"0" (0),"1" (s),"2" (c)); return __res; } libc_hidden_def(strrchr) #ifdef __UCLIBC_SUSV3_LEGACY__ strong_alias(strrchr,rindex) #endif