}

	// Sanity check aux, auxint.
	if auxint != "" && !opHasAuxInt(op) {
		log.Fatalf("%s: op %s %s can't have auxint", loc, op.name, op.aux)
	}
	if aux != "" && !opHasAux(op) {
		log.Fatalf("%s: op %s %s can't have aux", loc, op.name, op.aux)
	}
	return
}

func opHasAuxInt(op opData) bool {
	switch op.aux {