Copying a string using asm

strcpy_asm.c

static inline 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;
}