void ECMultBase(GroupElemJac &out, const Number &gn) {
Number n; n.SetNumber(gn);
const ECMultConsts &c = GetECMultConsts();
out.SetAffine(c.prec[0][n.ShiftLowBits(4)]);
for (int j=1; j<64; j++) {
out.SetAdd(out, c.prec[j][n.ShiftLowBits(4)]);
}
out.SetAdd(out, c.fin);
}
WNAF(const Number &exp, int w) : used(0) {
int zeroes = 0;
Number x;
x.SetNumber(exp);
int sign = 1;
if (x.IsNeg()) {
sign = -1;
x.Negate();
}
while (!x.IsZero()) {
while (!x.IsOdd()) {
zeroes++;
x.Shift1();
}
int word = x.ShiftLowBits(w);
if (word & (1 << (w-1))) {
x.Inc();
PushNAF(sign * (word - (1 << w)), zeroes);
} else {
PushNAF(sign * word, zeroes);
}
zeroes = w-1;
}
}
