checkUint64(t, name, samples[i].Value.Uint64(), mstats.HeapAlloc)
		case "/memory/classes/heap/unused:bytes":
			checkUint64(t, name, samples[i].Value.Uint64(), mstats.HeapInuse-mstats.HeapAlloc)
		case "/memory/classes/heap/stacks:bytes":
			checkUint64(t, name, samples[i].Value.Uint64(), mstats.StackInuse)
		case "/memory/classes/metadata/mcache/free:bytes":
			checkUint64(t, name, samples[i].Value.Uint64(), mstats.MCacheSys-mstats.MCacheInuse)

	checkdiv3(^x, y)
	checkdiv3(x, ^y)
	checkdiv3(^x, ^y)
}

var ntest int64 = 0

func checkdiv3(x, y uint64) {
	ntest++
	if ntest&(ntest-1) == 0 && long {
		println(ntest, "...")
	}
	checkuint64(x, y)
	if (uint64(uint32(x)) == x || uint64(uint32(^x)) == ^x) && (uint64(uint32(y)) == y || uint64(uint32(^y)) == ^y) {
		checkuint32(uint32(x), uint32(y))
	}