0x73, 0xfe, 0x6f, 0x2b, 0xee, 0x6c, 0x03, 0x52})
var d2 = new(field.Element).Add(d, d)

func (v *projCached) FromP3(p *Point) *projCached {
	v.YplusX.Add(&p.y, &p.x)
	v.YminusX.Subtract(&p.y, &p.x)
	v.Z.Set(&p.z)
	v.T2d.Multiply(&p.t, d2)
	return v
}

func (v *affineCached) FromP3(p *Point) *affineCached {
	v.YplusX.Add(&p.y, &p.x)
	v.YminusX.Subtract(&p.y, &p.x)
	v.T2d.Multiply(&p.t, d2)

	Destination
)

// From3Type returns p.GetFrom3().Type, or TYPE_NONE when
// p.GetFrom3() returns nil.
func (p *Prog) From3Type() AddrType {
	from3 := p.GetFrom3()
	if from3 == nil {
		return TYPE_NONE
	}
	return from3.Type
}

// GetFrom3 returns second source operand (the first is Prog.From).
// The same kinds of operands are saved in order so GetFrom3 actually

	p1.From.Sym = source.Sym
	p1.From.Name = obj.NAME_GOTREF
	p1.To.Type = obj.TYPE_REG
	p1.To.Reg = reg

	p2.As = p.As
	p2.From = p.From
	p2.To = p.To
	if from3 := p.GetFrom3(); from3 != nil {
		p2.AddRestSource(*from3)
	}
	if p.From.Name == obj.NAME_EXTERN {
		p2.From.Reg = reg
		p2.From.Name = obj.NAME_NONE
		p2.From.Sym = nil
	} else if p.To.Name == obj.NAME_EXTERN {
		p2.To.Reg = reg