repe.s

	.global _start
.text

# strcmp(rdi=str1, rsi=str2, ecx=length_of_longest): %rax
_start:
	pushq %rbp
	movq %rsp, %rbp

	movabsq $str1, %rdi
	movabsq $str2, %rsi
	movl $str1_size, %ecx
	call strcmp

	leave
	ret

strcmp:
	pushq %rbp
	movq %rsp, %rbp

	cld
	repe cmpsb # compare %rdi[n]==%rsi[n] n=0..%ecx
	movl %ecx, %eax
	and $1, %eax # make sure result is 0 (eq) or 1 (uneq)

	leave
	ret

str1:
	.asciz "Hello ate"
	.set str1_size, .-str1
str2:
	.asciz "Hello ate"
	.set str2_size, .-str2