From 0b09d1e5ed195662e8df3246ca4cc450947cc0f8 Mon Sep 17 00:00:00 2001 From: "Peter S. Mazinger" Date: Fri, 11 Nov 2005 22:41:52 +0000 Subject: Split up string.c, make internals hidden --- libc/string/i386/string.c | 328 ---------------------------------------------- 1 file changed, 328 deletions(-) delete mode 100644 libc/string/i386/string.c (limited to 'libc/string/i386/string.c') diff --git a/libc/string/i386/string.c b/libc/string/i386/string.c deleted file mode 100644 index f827445fe..000000000 --- a/libc/string/i386/string.c +++ /dev/null @@ -1,328 +0,0 @@ -/* - * 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. - * - * Modified for uClibc by Erik Andersen - * 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 - */ - -#define _GNU_SOURCE -#include -#include /* for __LOCALE_C_ONLY */ - -#ifdef L_strcpy -char * strcpy(char * dest, const char * src) -{ - int d0, d1, d2; - __asm__ __volatile__( - "1:\tlodsb\n\t" - "stosb\n\t" - "testb %%al,%%al\n\t" - "jne 1b" - : "=&S" (d0), "=&D" (d1), "=&a" (d2) - :"0" (src),"1" (dest) : "memory"); - return dest; -} -#endif - - -#ifdef L_strncpy -char * strncpy(char * dest, const char * src, size_t count) -{ - int d0, d1, d2, d3; - __asm__ __volatile__( - "incl %2\n" - "1:\n" - "decl %2\n" - "jz 2f\n" - "lodsb\n\t" - "stosb\n\t" - "testb %%al,%%al\n\t" - "jne 1b\n\t" - "decl %2\n" - "rep\n\t" - "stosb\n" - "2:" - : "=&S" (d0), "=&D" (d1), "=&c" (d2), "=&a" (d3) - :"0" (src),"1" (dest),"2" (count) : "memory"); - return dest; -} -#endif - - -#ifdef L_strcat -char *strcat(char * dest, const char * src) -{ - int d0, d1, d2, d3; - __asm__ __volatile__( - "repne\n\t" - "scasb\n\t" - "decl %1\n" - "1:\tlodsb\n\t" - "stosb\n\t" - "testb %%al,%%al\n\t" - "jne 1b" - : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) - : "0" (src), "1" (dest), "2" (0), "3" (0xffffffff):"memory"); - return dest; -} -#endif - - -#ifdef L_strncat -char *strncat(char * dest, - const char * src, size_t count) -{ - int d0, d1, d2, d3; - __asm__ __volatile__( - "repne\n\t" - "scasb\n\t" - "decl %1\n\t" - "movl %8,%3\n" - "incl %3\n" - "1:\tdecl %3\n\t" - "jz 2f\n" - "lodsb\n\t" - "stosb\n\t" - "testb %%al,%%al\n\t" - "jne 1b\n" - "jmp 3f\n" - "2:\txorl %2,%2\n\t" - "stosb\n" - "3:" - : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) - : "0" (src),"1" (dest),"2" (0),"3" (0xffffffff), "g" (count) - : "memory"); - return dest; -} -#endif - - -#ifdef L_strcmp -int strcmp(const char *cs, const char *ct) -{ - int d0, d1; - register int __res; - __asm__ __volatile__( - "1:\tlodsb\n\t" - "scasb\n\t" - "jne 2f\n\t" - "testb %%al,%%al\n\t" - "jne 1b\n\t" - "xorl %%eax,%%eax\n\t" - "jmp 3f\n" - "2:\tsbbl %%eax,%%eax\n\t" - "orb $1,%%al\n" - "3:" - :"=a" (__res), "=&S" (d0), "=&D" (d1) - :"1" (cs),"2" (ct)); - return __res; -} -#ifdef __LOCALE_C_ONLY -weak_alias(strcmp,strcoll); -#endif /* __LOCALE_C_ONLY */ -#endif - - -#ifdef L_strncmp -int strncmp(const char *cs, const char *ct, size_t count) -{ - register int __res; - int d0, d1, d2; - __asm__ __volatile__( - "incl %3\n" - "1:\tdecl %3\n\t" - "jz 2f\n" - "lodsb\n\t" - "scasb\n\t" - "jne 3f\n\t" - "testb %%al,%%al\n\t" - "jne 1b\n" - "2:\txorl %%eax,%%eax\n\t" - "jmp 4f\n" - "3:\tsbbl %%eax,%%eax\n\t" - "orb $1,%%al\n" - "4:" - :"=a" (__res), "=&S" (d0), "=&D" (d1), "=&c" (d2) - :"1" (cs),"2" (ct),"3" (count)); - return __res; -} -#endif - - -#ifdef L_strchr -char * strchr(const char *s, int c) -{ - int d0; - register char * __res; - __asm__ __volatile__( - "movb %%al,%%ah\n" - "1:\tlodsb\n\t" - "cmpb %%ah,%%al\n\t" - "je 2f\n\t" - "testb %%al,%%al\n\t" - "jne 1b\n\t" - "movl $1,%1\n" - "2:\tmovl %1,%0\n\t" - "decl %0" - :"=a" (__res), "=&S" (d0) : "1" (s),"0" (c)); - return __res; -} -weak_alias(strchr,index); -#endif - - -#ifdef L_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; -} -weak_alias(strrchr,rindex); -#endif - - - -#ifdef L_strlen -size_t strlen(const char *s) -{ - int d0; - register int __res; - __asm__ __volatile__( - "repne\n\t" - "scasb\n\t" - "notl %0\n\t" - "decl %0" - :"=c" (__res), "=&D" (d0) :"1" (s),"a" (0), "0" (0xffffffff)); - return __res; -} -#endif - - -#ifdef L_strnlen -size_t strnlen(const char *s, size_t count) -{ - int d0; - register int __res; - __asm__ __volatile__( - "movl %2,%0\n\t" - "incl %1\n" - "jmp 2f\n" - "1:\tcmpb $0,(%0)\n\t" - "je 3f\n\t" - "incl %0\n" - "2:\tdecl %1\n\t" - "jne 1b\n" - "3:\tsubl %2,%0" - :"=a" (__res), "=&d" (d0) - :"c" (s),"1" (count)); - return __res; -} -#endif - - -#ifdef L_memcpy -void *memcpy(void * to, const void * from, size_t n) -{ - int d0, d1, d2; - __asm__ __volatile__( - "rep ; movsl\n\t" - "testb $2,%b4\n\t" - "je 1f\n\t" - "movsw\n" - "1:\ttestb $1,%b4\n\t" - "je 2f\n\t" - "movsb\n" - "2:" - : "=&c" (d0), "=&D" (d1), "=&S" (d2) - :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from) - : "memory"); - return (to); -} -#endif - - -#ifdef L_memmove -void *memmove(void *dest, const void *src, size_t n) -{ - int d0, d1, d2; - if (dest