for j := 1; j <= 8; j++ {
		// Set dest = j*Q if |x| = j
		cond := subtle.ConstantTimeByteEq(xabs, uint8(j))
		dest.Select(&v.points[j-1], dest, cond)
	}
	// Now dest = |x|*Q, conditionally negate to get x*Q
	dest.CondNeg(int(xmask & 1))
}

// Set dest to x*Q, where -8 <= x <= 8, in constant time.
func (v *affineLookupTable) SelectInto(dest *affineCached, x int8) {
	// Compute xabs = |x|
	xmask := x >> 7

	return v
}

// CondNeg negates v if cond == 1 and leaves it unchanged if cond == 0.
func (v *projCached) CondNeg(cond int) *projCached {
	v.YplusX.Swap(&v.YminusX, cond)
	v.T2d.Select(new(field.Element).Negate(&v.T2d), &v.T2d, cond)
	return v
}

// CondNeg negates v if cond == 1 and leaves it unchanged if cond == 0.
func (v *affineCached) CondNeg(cond int) *affineCached {

	case A0 <= r && r <= A7:
		return fmt.Sprintf("a%d", int(r-A0))
	default:
		return fmt.Sprintf("Reg(%d)", int(r))
	}
}

// CondReg is a bit or field in the condition register.
type CondReg int8

const (
	_ CondReg = iota
	// Condition Regster bits
	Cond0LT
	Cond0GT
	Cond0EQ
	Cond0SO
	Cond1LT
	Cond1GT
	Cond1EQ
	Cond1SO
	Cond2LT
	Cond2GT
	Cond2EQ

	switch a.Type {
	default:
		return nil
	case TypeUnknown:
		return nil
	case TypeReg:
		return R0 + Reg(a.BitFields.Parse(i))
	case TypeCondRegBit:
		return Cond0LT + CondReg(a.BitFields.Parse(i))
	case TypeCondRegField:
		return CR0 + CondReg(a.BitFields.Parse(i))
	case TypeFPReg:
		return F0 + Reg(a.BitFields.Parse(i))
	case TypeVecReg:
		return V0 + Reg(a.BitFields.Parse(i))
	case TypeVecSReg:

		STD, STDU,
		STFD, STFDU,
		STFS, STFSU,
		STQ, HASHST, HASHSTP:
		return op + " " + strings.Join(args, ",")

	case FCMPU, FCMPO, CMPD, CMPDI, CMPLD, CMPLDI, CMPW, CMPWI, CMPLW, CMPLWI:
		crf := int(inst.Args[0].(CondReg) - CR0)
		cmpstr := op + " " + args[1] + "," + args[2]
		if crf != 0 { // print CRx as the final operand if not implied (i.e BF != 0)
			cmpstr += "," + args[0]
		}
		return cmpstr

	case LIS:

		}
	}
	switch arg := arg.(type) {
	case Reg:
		if isLoadStoreOp(inst.Op) && argIndex == 1 && arg == R0 {
			return "0"
		}
		return arg.String()
	case CondReg:
		// The CondReg can either be found in a CMP, where the
		// condition register field is being set, or in an instruction
		// like a branch or isel that is testing a bit in a condition
		// register field.