BN_to_felem
if ((!BN_to_felem(x_in, point->X)) || (!BN_to_felem(y_in, point->Y)) || (!BN_to_felem(z1, point->Z)))
if ((!BN_to_felem(x_out, p->X)) || (!BN_to_felem(y_out, p->Y)) || (!BN_to_felem(z_out, p->Z)))
if ((!BN_to_felem(pre->g_pre_comp[0][1][0], group->generator->X)) || (!BN_to_felem(pre->g_pre_comp[0][1][1], group->generator->Y)) || (!BN_to_felem(pre->g_pre_comp[0][1][2], group->generator->Z)))
if ((!BN_to_felem(x_in, point->X)) || (!BN_to_felem(y_in, point->Y)) || (!BN_to_felem(z1, point->Z)))
if ((!BN_to_felem(x_out, p->X)) || (!BN_to_felem(y_out, p->Y)) || (!BN_to_felem(z_out, p->Z)))
if ((!BN_to_felem(x_tmp, group->generator->X)) || (!BN_to_felem(y_tmp, group->generator->Y)) || (!BN_to_felem(z_tmp, group->generator->Z)))
if ((!BN_to_felem(x_in, point->X)) || (!BN_to_felem(y_in, point->Y)) || (!BN_to_felem(z1, point->Z)))
if ((!BN_to_felem(x_out, p->X)) || (!BN_to_felem(y_out, p->Y)) || (!BN_to_felem(z_out, p->Z)))
if ((!BN_to_felem(pre->g_pre_comp[1][0], group->generator->X)) || (!BN_to_felem(pre->g_pre_comp[1][1], group->generator->Y)) || (!BN_to_felem(pre->g_pre_comp[1][2], group->generator->Z)))
if ((!BN_to_felem(x_in, point->X)) || (!BN_to_felem(y_in, point->Y)) || (!BN_to_felem(z1, point->Z)))
if ((!BN_to_felem(x_out, p->X)) || (!BN_to_felem(y_out, p->Y)) || (!BN_to_felem(z_out, p->Z)))
if ((!BN_to_felem(pre->g_pre_comp[1][0], group->generator->X)) || (!BN_to_felem(pre->g_pre_comp[1][1], group->generator->Y)) || (!BN_to_felem(pre->g_pre_comp[1][2], group->generator->Z)))