func jumpArm64(word string) bool {
	return arm64Jump[word]
}

var arm64SpecialOperand map[string]arm64.SpecialOperand

// ARM64SpecialOperand returns the internal representation of a special operand.
func ARM64SpecialOperand(name string) arm64.SpecialOperand {
	if arm64SpecialOperand == nil {
		// Generate mapping when function is first called.
		arm64SpecialOperand = map[string]arm64.SpecialOperand{}

	name := tok.String()
	if tok.ScanToken == scanner.Ident && !p.atStartOfRegister(name) {
		// See if this is an architecture specific special operand.
		switch p.arch.Family {
		case sys.ARM64:
			if opd := arch.ARM64SpecialOperand(name); opd != arm64.SPOP_END {
				a.Type = obj.TYPE_SPECIAL
				a.Offset = int64(opd)
			}
		case sys.RISCV64:
			if opd := arch.RISCV64SpecialOperand(name); opd != riscv.SPOP_END {