2022-04-15 11:00:55 +02:00
|
|
|
/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
|
|
|
|
|
#include <string.h>
|
|
|
|
|
|
|
|
|
|
int strncmp(const char* s1, const char* s2, size_t n)
|
|
|
|
|
{
|
|
|
|
|
register int __res;
|
|
|
|
|
int d0, d1, d2;
|
|
|
|
|
__asm__ __volatile__(
|
|
|
|
|
"1:\tdecl %3\n\t"
|
|
|
|
|
"js 2f\n\t"
|
|
|
|
|
"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"(s1), "2"(s2), "3"(n));
|
|
|
|
|
return __res;
|
|
|
|
|
}
|
