return choice(x.limbs[0] & 1) } // TrailingZeroBitsVarT returns the number of trailing zero bits in x. func (x *Nat) TrailingZeroBitsVarT() uint { var t uint limbs := x.limbs for _, l := range limbs { if l == 0 { t += _W continue } t += uint(bits.TrailingZeros(l)) break } return t } // cmpGeq returns 1 if x >= y, and 0 otherwise. // // Both operands must have the same announced length. // //go:norace func (x *Nat) cmpGeq(y *Nat) choice { // Eliminate bounds checks in the loop. size := len(x.limbs) xLimbs...