2022-04-15 11:00:55 +02:00
|
|
|
#include <string.h>
|
|
|
|
|
|
|
|
|
|
int strcmp(const char* s1, const char* s2)
|
|
|
|
|
{
|
|
|
|
|
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"(s1), "2"(s2));
|
|
|
|
|
return __res;
|
|
|
|
|
}
|
