nn_mod_dec
ATTRIBUTE_WARN_UNUSED_RET int nn_mod_dec(nn_t out, nn_src_t in1, nn_src_t p);
GENERIC_TEST_NN(nn_mod_dec, NN_MOD_DEC, "--%", nn_mod_dec, "nnn", "iio",
ret = nn_mod_dec(&(out->fp_val), &(in->fp_val), &(in->ctx->p));