not <code>3&amp;(1&lt;&lt;2)</code>.
Also, constants are always evaluated as 64-bit unsigned integers.
Thus <code>-2</code> is not the integer value minus two,
but the unsigned 64-bit integer with the same bit pattern.
The distinction rarely matters but
to avoid ambiguity, division or right shift where the right operand's
high bit is set is rejected.
</p>

		var buf [directory64EndLen + directory64LocLen]byte
		b := writeBuf(buf[:])

		// zip64 end of central directory record
		b.uint32(directory64EndSignature)
		b.uint64(directory64EndLen - 12) // length minus signature (uint32) and length fields (uint64)
		b.uint16(zipVersion45)           // version made by
		b.uint16(zipVersion45)           // version needed to extract
		b.uint32(0)                      // number of this disk

	}
	frameSize := p.positiveAtoi(op[0].String())
	if negative {
		frameSize = -frameSize
	}
	op = op[1:]
	argSize := int64(abi.ArgsSizeUnknown)
	if len(op) > 0 {
		// There is an argument size. It must be a minus sign followed by a non-negative integer literal.
		if len(op) != 2 || op[0].ScanToken != '-' || op[1].ScanToken != scanner.Int {
			p.errorf("TEXT %s: argument size must be of form -integer", name)
			return
		}