505   p224_felem ftmp, ftmp2, ftmp3, ftmp4;  in p224_felem_inv()  local
509   p224_felem_reduce(ftmp, tmp);  // 2  in p224_felem_inv()
510   p224_felem_mul(tmp, in, ftmp);  in p224_felem_inv()
511   p224_felem_reduce(ftmp, tmp);  // 2^2 - 1  in p224_felem_inv()
512   p224_felem_square(tmp, ftmp);  in p224_felem_inv()
513   p224_felem_reduce(ftmp, tmp);  // 2^3 - 2  in p224_felem_inv()
514   p224_felem_mul(tmp, in, ftmp);  in p224_felem_inv()
515   p224_felem_reduce(ftmp, tmp);  // 2^3 - 1  in p224_felem_inv()
516   p224_felem_square(tmp, ftmp);  in p224_felem_inv()
522   p224_felem_mul(tmp, ftmp2, ftmp);  in p224_felem_inv()
523   p224_felem_reduce(ftmp, tmp);  // 2^6 - 1  in p224_felem_inv()
524   p224_felem_square(tmp, ftmp);  in p224_felem_inv()
530   p224_felem_mul(tmp, ftmp2, ftmp);  in p224_felem_inv()
568   p224_felem_mul(tmp, ftmp2, ftmp);  in p224_felem_inv()
569   p224_felem_reduce(ftmp, tmp);  // 2^126 - 1  in p224_felem_inv()
570   p224_felem_square(tmp, ftmp);  in p224_felem_inv()
571   p224_felem_reduce(ftmp, tmp);  // 2^127 - 2  in p224_felem_inv()
572   p224_felem_mul(tmp, ftmp, in);  in p224_felem_inv()
573   p224_felem_reduce(ftmp, tmp);  // 2^127 - 1  in p224_felem_inv()
575     p224_felem_square(tmp, ftmp);  in p224_felem_inv()
576     p224_felem_reduce(ftmp, tmp);  in p224_felem_inv()
578   p224_felem_mul(tmp, ftmp, ftmp3);  in p224_felem_inv()
612   p224_felem delta, gamma, beta, alpha, ftmp, ftmp2;  in p224_point_double()  local
614   p224_felem_assign(ftmp, x_in);  in p224_point_double()
630   p224_felem_diff(ftmp, delta);  in p224_point_double()
636   p224_felem_mul(tmp, ftmp, ftmp2);  in p224_point_double()
643   p224_felem_assign(ftmp, beta);  in p224_point_double()
644   p224_felem_scalar(ftmp, 8);  in p224_point_double()
646   p224_felem_diff_128_64(tmp, ftmp);  in p224_point_double()
653   p224_felem_assign(ftmp, y_in);  in p224_point_double()
654   p224_felem_sum(ftmp, z_in);  in p224_point_double()
656   p224_felem_square(tmp, ftmp);  in p224_point_double()
698   p224_felem ftmp, ftmp2, ftmp3, ftmp4, ftmp5, x_out, y_out, z_out;  in p224_point_add()  local
730   p224_felem_reduce(ftmp, tmp);  in p224_point_add()
733   p224_felem_mul(tmp, ftmp, z1);  in p224_point_add()
746   p224_felem_mul(tmp, ftmp, x2);  in p224_point_add()
752   p224_felem_reduce(ftmp, tmp);  in p224_point_add()
756   x_equal = p224_felem_is_zero(ftmp);  in p224_point_add()
778   p224_felem_mul(tmp, ftmp, ftmp5);  in p224_point_add()
782   p224_felem_assign(ftmp5, ftmp);  in p224_point_add()
783   p224_felem_square(tmp, ftmp);  in p224_point_add()
784   p224_felem_reduce(ftmp, tmp);  in p224_point_add()
787   p224_felem_mul(tmp, ftmp, ftmp5);  in p224_point_add()
791   p224_felem_mul(tmp, ftmp2, ftmp);  in p224_point_add()