Linux/Unix编程

开发平台：

Unix_Linux

strstr.c：源码内容

							#include <linux/string.h>
char * strstr(const char * cs,const char * ct)
{
int	d0, d1;
register char * __res;
__asm__ __volatile__(
	"movl %6,%%edint"
	"repnent"
	"scasbnt"
	"notl %%ecxnt"
	"decl %%ecxnt"	/* NOTE! This also sets Z if searchstring='' */
	"movl %%ecx,%%edxn"
	"1:tmovl %6,%%edint"
	"movl %%esi,%%eaxnt"
	"movl %%edx,%%ecxnt"
	"repent"
	"cmpsbnt"
	"je 2fnt"		/* also works for empty string, see above */
	"xchgl %%eax,%%esint"
	"incl %%esint"
	"cmpb $0,-1(%%eax)nt"
	"jne 1bnt"
	"xorl %%eax,%%eaxnt"
	"2:"
	:"=a" (__res), "=&c" (d0), "=&S" (d1)
	:"0" (0), "1" (0xffffffff), "2" (cs), "g" (ct)
	:"dx", "di");
return __res;
}

						