}
		if got := uint32(tt.x) ^ (uint32(tt.x) - 1); got != uint32(tt.want) {
			t.Errorf("%#x ^ (%#x-1) = %#x, want %#x", tt.x, tt.x, got, uint32(tt.want))
		}
	}
}

// Test to use BLSR, if available
func TestBLSR(t *testing.T) {
	for _, tt := range []struct {
		x, want uint64
	}{
		{0b00001111, 0b00001110},
		{0b00001110, 0b00001100},
		{0b00001100, 0b00001000},
		{0b11000110, 0b11000100},