scc

 1	.file 	"memmove.s"
 2
 3	.text
 4	.globl	memmove,_memmove
 5_memmove:
 6memmove:
 7	movq	%rdi,%rax
 8
 9	movq	%rdx,%rcx
10
11	cmpq	%rdi,%rsi
12	jg	forward
13	jl	backward
14	ret
15
16forward:
17	cld
18	rep
19	movsb
20	ret
21
22backward:
23	std
24	movq	%rdx,%r8
25	subq	$1,%r8
26	addq	%r8,%rdi
27	addq	%r8,%rsi
28	rep;	movsb
29	ret