568   BIGNUM *n0, *n1, *n2, *n3, *n4, *n5, *n6;  in ec_GFp_simple_add()  local
593   n0 = BN_CTX_get(ctx);  in ec_GFp_simple_add()
617     if (!field_sqr(group, n0, &b->Z, ctx) ||  in ec_GFp_simple_add()
618         !field_mul(group, n1, &a->X, n0, ctx)) {  in ec_GFp_simple_add()
623     if (!field_mul(group, n0, n0, &b->Z, ctx) ||  in ec_GFp_simple_add()
624         !field_mul(group, n2, &a->Y, n0, ctx)) {  in ec_GFp_simple_add()
638     if (!field_sqr(group, n0, &a->Z, ctx) ||  in ec_GFp_simple_add()
639         !field_mul(group, n3, &b->X, n0, ctx)) {  in ec_GFp_simple_add()
644     if (!field_mul(group, n0, n0, &a->Z, ctx) ||  in ec_GFp_simple_add()
645         !field_mul(group, n4, &b->Y, n0, ctx)) {  in ec_GFp_simple_add()
690       if (!BN_copy(n0, &b->Z)) {  in ec_GFp_simple_add()
694       if (!BN_copy(n0, &a->Z)) {  in ec_GFp_simple_add()
697     } else if (!field_mul(group, n0, &a->Z, &b->Z, ctx)) {  in ec_GFp_simple_add()
700     if (!field_mul(group, &r->Z, n0, n5, ctx)) {  in ec_GFp_simple_add()
708   if (!field_sqr(group, n0, n6, ctx) ||  in ec_GFp_simple_add()
711       !BN_mod_sub_quick(&r->X, n0, n3, p)) {  in ec_GFp_simple_add()
717   if (!BN_mod_lshift1_quick(n0, &r->X, p) ||  in ec_GFp_simple_add()
718       !BN_mod_sub_quick(n0, n3, n0, p)) {  in ec_GFp_simple_add()
724   if (!field_mul(group, n0, n0, n6, ctx) ||  in ec_GFp_simple_add()
729       !BN_mod_sub_quick(n0, n0, n1, p)) {  in ec_GFp_simple_add()
732   if (BN_is_odd(n0) && !BN_add(n0, n0, p)) {  in ec_GFp_simple_add()
736   if (!BN_rshift1(&r->Y, n0)) {  in ec_GFp_simple_add()
759   BIGNUM *n0, *n1, *n2, *n3;  in ec_GFp_simple_dbl()  local
780   n0 = BN_CTX_get(ctx);  in ec_GFp_simple_dbl()
795     if (!field_sqr(group, n0, &a->X, ctx) ||  in ec_GFp_simple_dbl()
796         !BN_mod_lshift1_quick(n1, n0, p) ||  in ec_GFp_simple_dbl()
797         !BN_mod_add_quick(n0, n0, n1, p) ||  in ec_GFp_simple_dbl()
798         !BN_mod_add_quick(n1, n0, &group->a, p)) {  in ec_GFp_simple_dbl()
804         !BN_mod_add_quick(n0, &a->X, n1, p) ||  in ec_GFp_simple_dbl()
806         !field_mul(group, n1, n0, n2, ctx) ||  in ec_GFp_simple_dbl()
807         !BN_mod_lshift1_quick(n0, n1, p) ||  in ec_GFp_simple_dbl()
808         !BN_mod_add_quick(n1, n0, n1, p)) {  in ec_GFp_simple_dbl()
814     if (!field_sqr(group, n0, &a->X, ctx) ||  in ec_GFp_simple_dbl()
815         !BN_mod_lshift1_quick(n1, n0, p) ||  in ec_GFp_simple_dbl()
816         !BN_mod_add_quick(n0, n0, n1, p) ||  in ec_GFp_simple_dbl()
820         !BN_mod_add_quick(n1, n1, n0, p)) {  in ec_GFp_simple_dbl()
828     if (!BN_copy(n0, &a->Y)) {  in ec_GFp_simple_dbl()
831   } else if (!field_mul(group, n0, &a->Y, &a->Z, ctx)) {  in ec_GFp_simple_dbl()
834   if (!BN_mod_lshift1_quick(&r->Z, n0, p)) {  in ec_GFp_simple_dbl()
849   if (!BN_mod_lshift1_quick(n0, n2, p) ||  in ec_GFp_simple_dbl()
851       !BN_mod_sub_quick(&r->X, &r->X, n0, p)) {  in ec_GFp_simple_dbl()
857   if (!field_sqr(group, n0, n3, ctx) ||  in ec_GFp_simple_dbl()
858       !BN_mod_lshift_quick(n3, n0, 3, p)) {  in ec_GFp_simple_dbl()
864   if (!BN_mod_sub_quick(n0, n2, &r->X, p) ||  in ec_GFp_simple_dbl()
865       !field_mul(group, n0, n1, n0, ctx) ||  in ec_GFp_simple_dbl()
866       !BN_mod_sub_quick(&r->Y, n0, n3, p)) {  in ec_GFp_simple_dbl()