1 	.globl	_tas
2 _tas:
3 	li	%r0, 0
4 	mr	%r4, %r3
5 	lis	%r5, 0xcafe
6 	ori	%r5, %r5, 0xbabe
7 1:
8 	lwarx	%r3, %r0, %r4
9 	cmpwi	%r3, 0
10 	bne	2f
11 	stwcx.	%r5, %r0, %r4
12 	bne-	1b
13 2:
14 	sync
15 	blr
16