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-rw-r--r--libc/string/i386/string.c328
1 files changed, 0 insertions, 328 deletions
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 <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
- */
-
-#define _GNU_SOURCE
-#include <string.h>
-#include <locale.h> /* 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<src)
- __asm__ __volatile__(
- "rep\n\t"
- "movsb"
- : "=&c" (d0), "=&S" (d1), "=&D" (d2)
- :"0" (n),"1" (src),"2" (dest)
- : "memory");
- else
- __asm__ __volatile__(
- "std\n\t"
- "rep\n\t"
- "movsb\n\t"
- "cld"
- : "=&c" (d0), "=&S" (d1), "=&D" (d2)
- :"0" (n),
- "1" (n-1+(const char *)src),
- "2" (n-1+(char *)dest)
- :"memory");
- return dest;
-}
-#endif
-
-#ifdef L_memchr
-void *memchr(const void *cs, int c, size_t count)
-{
- int d0;
- register void * __res;
- if (!count)
- return NULL;
- __asm__ __volatile__(
- "repne\n\t"
- "scasb\n\t"
- "je 1f\n\t"
- "movl $1,%0\n"
- "1:\tdecl %0"
- :"=D" (__res), "=&c" (d0) : "a" (c),"0" (cs),"1" (count));
- return __res;
-}
-#endif
-
-#ifdef L_memset
-void *memset(void *s, int c, size_t count)
-{
- int d0, d1;
- __asm__ __volatile__(
- "rep\n\t"
- "stosb"
- : "=&c" (d0), "=&D" (d1)
- :"a" (c),"1" (s),"0" (count)
- :"memory");
- return s;
-}
-#endif
-
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