instructions[s] = obj.As(i)
	}
	for i, s := range mips.Anames {
		if obj.As(i) >= obj.A_ARCHSPECIFIC {
			instructions[s] = obj.As(i) + obj.ABaseMIPS
		}
	}
	// Annoying alias.
	instructions["JAL"] = mips.AJAL

	return &Arch{
		LinkArch:       linkArch,
		Instructions:   instructions,
		Register:       register,
		RegisterPrefix: registerPrefix,
		RegisterNumber: mipsRegisterNumber,
		IsJump:         jumpMIPS,