curve_edwards_shortw_check
ATTRIBUTE_WARN_UNUSED_RET int curve_edwards_shortw_check(ec_edwards_crv_src_t edwards_crv, ec_shortw_crv_src_t shortw_crv, fp_src_t alpha_edwards);
ret = curve_edwards_shortw_check(in_edwards->crv, shortw_crv, alpha_edwards); EG(ret, err);
ret = curve_edwards_shortw_check(edwards_crv, in_shortw->crv, alpha_edwards); EG(ret, err);