/* Author      : Rick van der Zwet
 * S-number    : 0433373
 * Version     : $Id: sim.c 365 2007-12-03 08:54:04Z rick $
 * Copyright   : FreeBSD Licence
 * Description : MIPS simulator. Main module
 */


#include <stdlib.h>
#include <stdio.h>
#include <sysexits.h>
#include "sim.h"
#include "alu.h"
#include "memory.h"
#include "control.h"
#include "constant.h"


/* Allow printing of diagnostics */
void
_print_diag(const int round)
{
    fprintf(stderr, "===TAG ROUND %i====\n", round);
    fprintf(stderr, "a        : %u\n", a);
    fprintf(stderr, "b        : %u\n", b);
    fprintf(stderr, "c        : %u\n", c);
    fprintf(stderr, "temp     : %u\n", temp);
    fprintf(stderr, "temp2    : %u\n", temp2);
    fprintf(stderr, "pc       : %u\n", pc);
    fprintf(stderr, "mar      : %u\n", mar);
    fprintf(stderr, "mdr      : %u\n", mdr);
    fprintf(stderr, "ir       : %u\n", ir);
    fprintf(stderr, "imm      : %u\n", imm);
    fprintf(stderr, "constant : %u\n", constant);
    fprintf(stderr, "mpc      : %u\n", mpc);
}

int main ()
{
    fprintf(stderr, "===SIMULATION===\n");
    fprintf(stderr, "===INIT===\n");
    /* Initiate control */
    control_init();
    /* Read memory from stdin */
    readmem();

    /* Limit calls to 10000 to make debugging possible */
    int cycles = 0;
    for (;cycles < 10000; cycles++)
    {
        if (mpc == 43) /* Break line, means end */
            break;
        /* Disable if you do not want the verbose outpt */
         _print_diag(cycles);
        /* execute command */
        set_signals();
        find_new_mPC();
    }

    /* Dump memory and print diag */
    fprintf(stderr, "===BEGIN MEMORYDUMP===\n");
    writemem();
    fprintf(stderr, "====END MEMORYDUMP====\n");
    fprintf(stderr, "Number of microinstructions : %i\n", cycles);
    fprintf(stderr, "Student: Rick van der Zwet\n");
    fprintf(stderr, "StudentNumber: 0433373\n");
    fprintf(stderr, "===END===\n");
    return(EX_OK);
}