.data

min:
.long 0
max:
.long 0
current
.byte 0

.text
.type max_diff,@function
.global max_diff

max_diff:
	PUSH %rbp
	MOV %rsp,%rbp
	MOVL (%rdi), min
	MOVL (%rdi), max
	ADD  $24, (%rbp)
	MOV  $2, %rcx
loop:
	CMP $0, %rcx
	JE exit
	DEC %rcx
	MOVL (%rbp), %eax
	CMP min, %eax
	JL changeMin
	CMP max, %eax
	JG changeMax

changeMin:
	MOVL %eax, min
	ADD $8, (%rbp)
	JMP loop

changeMax:
	MOVL %eax, max
	ADD $8, (%rbp)
	JMP loop

exit:
	MOVL min, %eax
	MOVL max, %ebx
	SUB %eax, %ebx
	XOR %rax, %rax
	MOV %ebx, %rax
	RET