var amd64OperandTests = []operandTest{
	{"$(-1.0)", "$(-1.0)"},
	{"$(0.0)", "$(0.0)"},
	{"$(0x2000000+116)", "$33554548"},
	{"$(0x3F<<7)", "$8064"},
	{"$(112+8)", "$120"},
	{"$(1<<63)", "$-9223372036854775808"},
	{"$-1", "$-1"},
	{"$0", "$0"},
	{"$0-0", "$0"},
	{"$0-16", "$-16"},
	{"$0x000FFFFFFFFFFFFF", "$4503599627370495"},
	{"$0x01", "$1"},
	{"$0x02", "$2"},

// which contains no body.
func TestZeroLengthHeader(t *testing.T) {
	h := FileHeader{
		Name:   "extadata.txt",
		Method: Deflate,
		Extra: []byte{
			85, 84, 5, 0, 3, 154, 144, 195, 77, // tag 21589 size 5
			85, 120, 0, 0, // tag 30805 size 0
		},
	}
	testValidHeader(&h, t)
}

// Just benchmarking how fast the Zip64 test above is. Not related to
// our zip performance, since the test above disabled CRC32 and flate.