gcc -S -Wall -O2 test.c

	.file	"test.c"
	.text
	.p2align 4,,15
.globl test
	.type	test, @function
test:
	pushl	%ebp
	movl	$-1, %eax
	movl	%esp, %ebp
	xorl	%edx, %edx
	movl	8(%ebp), %ecx
	popl	%ebp
	sall	%cl, %eax
	andb	$32, %cl
	cmovne	%eax, %edx
	cmovne	%edx, %eax
	ret
	.size	test, .-test
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%d"
.LC1:
	.string	"%ul\n"
	.text
	.p2align 4,,15
.globl main
	.type	main, @function
main:
	pushl	%ebp
	movl	%esp, %ebp
	andl	$-16, %esp
	subl	$32, %esp
	leal	28(%esp), %eax
	movl	%eax, 8(%esp)
	movl	12(%ebp), %eax
	movl	$.LC0, 4(%esp)
	movl	4(%eax), %eax
	movl	%eax, (%esp)
	call	__isoc99_sscanf
	movl	28(%esp), %ecx
	movl	$-1, %eax
	xorl	%edx, %edx
	movl	$.LC1, 4(%esp)
	movl	$1, (%esp)
	sall	%cl, %eax
	andb	$32, %cl
	cmovne	%eax, %edx
	cmovne	%edx, %eax
	movl	%eax, 8(%esp)
	call	__printf_chk
	xorl	%eax, %eax
	leave
	ret
	.size	main, .-main
	.ident	"GCC: (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5"
	.section	.note.GNU-stack,"",@progbits