return C_SPR
		}
		return C_GOK

	case obj.TYPE_REGREG:
		return C_REGREG

	case obj.TYPE_REGREG2:
		return C_REGREG2

	case obj.TYPE_REGLIST:
		return C_REGLIST

	case obj.TYPE_SHIFT:
		if a.Reg == 0 {
			// register shift R>>i
			return C_SHIFT
		} else {
			// memory address with shifted offset R>>i(R)
			return C_SHIFTADDR
		}

	case obj.TYPE_MEM:
		switch a.Name {