strcpy:		stack_save			# char* strcpy(char *dst, char *src)
		move $s0, $a0			# $s0: *dst
strcpy_d0i:					# do
						# {
		lb $t0, 0($a1)			# 	*src
		sb $t0, 0($a0)			# 	*dst = *src
		addiu $a0, $a0, 1		# 	dst++
		addiu $a1, $a1, 1		# 	src++
strcpy_d0e:	bnez $t0, strcpy_d0i		# } while(*src++ != 0)
		move $v0, $s0
		stack_restore			# return dst