EC_POINT_dbl
if (!EC_POINT_dbl(group, tmp, val_sub[i][0], ctx))
if (!EC_POINT_dbl(group, r, r, ctx))
if (!EC_POINT_dbl(group, tmp_point, base, ctx))
if (!EC_POINT_dbl(group, base, tmp_point, ctx))
if (!EC_POINT_dbl(group, base, base, ctx))
if (!EC_POINT_dbl(group, s, s, ctx))
if (!EC_POINT_dbl(group, r, r, ctx))
return EC_POINT_dbl(group, r, a, ctx);
ret = EC_POINT_dbl(group, r, a, ctx);
int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, BN_CTX *ctx);