z2.Multiply(&z2, &tmp1)
		tmp0.Square(&tmp1)
		tmp1.Square(&x2)
		x3.Add(&z3, &z2)
		z2.Subtract(&z3, &z2)
		x2.Multiply(&tmp1, &tmp0)
		tmp1.Subtract(&tmp1, &tmp0)
		z2.Square(&z2)

		z3.Mult32(&tmp1, 121666)
		x3.Square(&x3)
		tmp0.Add(&tmp0, &z3)
		z3.Multiply(&x1, &z2)
		z2.Multiply(&tmp1, &tmp0)
	}

	x2.Swap(&x3, swap)
	z2.Swap(&z3, swap)

	z2.Invert(&z2)

	tmp1.Double(tmp2)    // tmp1 =  4*v in P1xP1 coords
	tmp2.FromP1xP1(tmp1) // tmp2 =  4*v in P2 coords
	tmp1.Double(tmp2)    // tmp1 =  8*v in P1xP1 coords
	tmp2.FromP1xP1(tmp1) // tmp2 =  8*v in P2 coords
	tmp1.Double(tmp2)    // tmp1 = 16*v in P1xP1 coords
	v.fromP1xP1(tmp1)    // now v = 16*(odd components)

	// Accumulate the even components
	for i := 0; i < 64; i += 2 {
		basepointTable[i/2].SelectInto(multiple, digits[i])

	"fmt"
	"runtime"
)

var (
	tmp1  = big.NewInt(0)
	tmp2  = big.NewInt(0)
	numer = big.NewInt(1)
	accum = big.NewInt(0)
	denom = big.NewInt(1)
	ten   = big.NewInt(10)
)

func extractDigit() int64 {
	if big.CmpInt(numer, accum) > 0 {
		return -1
	}
	tmp1.Lsh(numer, 1).Add(tmp1, numer).Add(tmp1, accum)
	big.DivModInt(tmp1, tmp2, tmp1, denom)
	tmp2.Add(tmp2, numer)
	if big.CmpInt(tmp2, denom) >= 0 {

#define VMULT(x1, x2, out_low, out_hi) \
	VMULEUW x1, x2, TMP1; \
	VMULOUW x1, x2, TMP2; \
	VMRGEW TMP1, TMP2, out_hi; \
	VMRGOW TMP1, TMP2, out_low

//
// Vector multiply add word
//
//	VMALF  x0, x1, y, out_low
//	VMALHF x0, x1, y, out_hi
#define VMULT_ADD(x1, x2, y, one, out_low, out_hi) \
	VMULEUW  y, one, TMP2; \
	VMULOUW  y, one, TMP1; \
	VMULEUW  x1, x2, out_low; \
	VMULOUW  x1, x2, out_hi; \

Russ Cox <******@****.***> 1594052821 -0400

Russ Cox <******@****.***> 1594052821 -0400

_b4tail:				/* do remaining words if possible */
	MOVW	savedts-4(SP), TS
	ADD	$3, TS, TMP
_b4loop:
	CMP	TMP, TE
	BLS	_b1tail

	MOVW.W	-4(FROM), TMP1	/* pre-indexed */
	MOVW.W	TMP1, -4(TE)	/* pre-indexed */
	B	_b4loop

_b1tail:				/* remaining bytes */
	CMP	TE, TS
	BEQ	_return

	MOVBU.W	-1(FROM), TMP	/* pre-indexed */
	MOVBU.W	TMP, -1(TE)	/* pre-indexed */
	B	_b1tail

_forward:

Russ Cox <******@****.***> 1594052821 -0400

Russ Cox <******@****.***> 1410149331 -0400

Russ Cox <******@****.***> 1410149331 -0400