return x >> 1 >> 1
}

//go:noinline
func two8ur(x uint8) uint8 {
	return x >> 1 >> 1
}

func TestShiftCombine(t *testing.T) {
	if got, want := two64l(4), int64(16); want != got {
		t.Errorf("4<<1<<1 == %d, want %d", got, want)
	}
	if got, want := two64r(64), int64(16); want != got {
		t.Errorf("64>>1>>1 == %d, want %d", got, want)
	}
	if got, want := two64ur(64), uint64(16); want != got {

	{0x7f7fffff, float32(max32), float32(max32 - ulp32 + ulp32/2 + ulp32/two64), "max32 - ulp32 + ulp32/2 + ulp32/two64"},
	{0x7f7fffff, float32(max32), float32(max32 - ulp32/2 + ulp32/two64), "max32 - ulp32/2 + ulp32/two64"},
	{0x7f7fffff, float32(max32), float32(max32), "max32"},
	{0x7f7fffff, float32(max32), float32(max32 + ulp32/2 - ulp32/two64), "max32 + ulp32/2 - ulp32/two64"},

// license that can be found in the LICENSE file.

package main

// See float_lit2.go for motivation for these values.
const (
	two24   = 1.0 * (1 << 24)
	two53   = 1.0 * (1 << 53)
	two64   = 1.0 * (1 << 64)
	two128  = two64 * two64
	two256  = two128 * two128
	two512  = two256 * two256
	two768  = two512 * two256
	two1024 = two512 * two512

	ulp32 = two128 / two24
	max32 = two128 - ulp32

	ulp64 = two1024 / two53