o      uint32
		n      uint32
	}

	x.before = _magic
	x.after = _magic
	for j := 0; j < 32; j += 1 {
		x.i = (1 << j) + 0
		x.o = (1 << j) + 0
		x.n = (1 << j) + 1
		if !atomic.CasRel(&x.i, x.o, x.n) {
			t.Fatalf("should have swapped %#x %#x", x.o, x.n)
		}

		if x.i != x.n {
			t.Fatalf("wrong x.i after swap: x.i=%#x x.n=%#x", x.i, x.n)
		}

#include "go_asm.h"
#include "textflag.h"

TEXT ·Casint32(SB), NOSPLIT, $0-17
	B	·Cas(SB)

TEXT ·Casint64(SB), NOSPLIT, $0-25
	B	·Cas64(SB)

TEXT ·Casuintptr(SB), NOSPLIT, $0-25
	B	·Cas64(SB)

TEXT ·CasRel(SB), NOSPLIT, $0-17
	B	·Cas(SB)

TEXT ·Loadint32(SB), NOSPLIT, $0-12
	B	·Load(SB)

TEXT ·Loadint64(SB), NOSPLIT, $0-16
	B	·Load64(SB)

TEXT ·Loaduintptr(SB), NOSPLIT, $0-16
	B	·Load64(SB)