#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[])
{
	/* Print */
	if (argc > 1) {
		// Wait for all memory operations to finish
		__asm__ volatile ("fence");

		if (strcmp(argv[1], "mem-in-order") == 0) {
			__asm__ volatile ("fence");
			__asm__ volatile ("csrwi  0x801, 2");
		} else if (strcmp(argv[1], "all-in-order") == 0) {
			__asm__ volatile ("fence");
			__asm__ volatile ("csrwi  0x801, 7");
		} else if (strcmp(argv[1], "all-out-of-order") == 0) {
			__asm__ volatile ("fence");
			__asm__ volatile ("csrwi  0x801, 0");
		} else {
			fprintf(stderr, "unknown '%s', use: mem-in-order, all-in-order or all-out-of-order\n", argv[1]);
			exit(1);
		}
	}

	// Wait for all memory operations to finish
	__asm__ volatile ("fence");
	unsigned result;
	asm("csrr %0, 0x801" : "=r"(result) : );
	printf("CSR 0x801 = %xu\n", result);

	return 0;
}