vlo := v & ((1 << 32) - 1)
	vhi := v >> 32
	if vlo != vhi {
		t.Fatalf("Int64: %#x != %#x", vlo, vhi)
	}
	new := v + 1 + 1<<32
	StoreInt64(addr, new)
}

func hammerStoreLoadInt64Method(t *testing.T, paddr unsafe.Pointer) {
	addr := (*Int64)(paddr)
	v := addr.Load()
	vlo := v & ((1 << 32) - 1)
	vhi := v >> 32
	if vlo != vhi {
		t.Fatalf("Int64: %#x != %#x", vlo, vhi)
	}