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 {
				a.Type = obj.TYPE_SPECIAL
				a.Offset = int64(opd)
			}
		}

		if a.Type != obj.TYPE_SPECIAL {