Function usage

smallthinker/tests/test-backend-ops.cpp:4678–4685

}

static void usage(char ** argv) {
    printf("Usage: %s [mode] [-o <op>] [-b <backend>] [-p <params regex>]\n", argv[0]);
    printf("    valid modes:\n");
    printf("      - test (default, compare with CPU backend for correctness)\n");
    printf("      - grad (compare gradients from backpropagation with method of finite differences)\n");
    printf("      - perf (performance evaluation)\n");
    printf("    op names for -o are as given by ggml_op_desc() (e.g. ADD, MUL_MAT, etc)\n");
}

int main(int argc, char ** argv) {
    test_mode mode = MODE_TEST;