diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/string/i386/string.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/libc/string/i386/string.c b/libc/string/i386/string.c index 779087aed..8a7f1a89b 100644 --- a/libc/string/i386/string.c +++ b/libc/string/i386/string.c @@ -48,12 +48,15 @@ char * strncpy(char * dest, const char * src, size_t count) { int d0, d1, d2, d3; __asm__ __volatile__( - "1:\tdecl %2\n\t" - "js 2f\n\t" + "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:" @@ -93,14 +96,17 @@ char *strncat(char * dest, "scasb\n\t" "decl %1\n\t" "movl %8,%3\n" + "incl %3\n" "1:\tdecl %3\n\t" - "js 2f\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" + "stosb\n" + "3:" : "=&S" (d0), "=&D" (d1), "=&a" (d2), "=&c" (d3) : "0" (src),"1" (dest),"2" (0),"3" (0xffffffff), "g" (count) : "memory"); @@ -141,8 +147,9 @@ 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" - "js 2f\n\t" + "jz 2f\n" "lodsb\n\t" "scasb\n\t" "jne 3f\n\t" @@ -226,12 +233,12 @@ size_t strnlen(const char *s, size_t count) 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" - "cmpl $-1,%1\n\t" "jne 1b\n" "3:\tsubl %2,%0" :"=a" (__res), "=&d" (d0) |