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/* exit.c. Test of Or1ksim program multiplication instructions

   Copyright (C) 1999-2006 OpenCores

   Copyright (C) 2010 Embecosm Limited

   Contributors various OpenCores participants

   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>

   This file is part of OpenRISC 1000 Architectural Simulator.

   This program is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by the Free

   Software Foundation; either version 3 of the License, or (at your option)

   any later version.

   This program is distributed in the hope that it will be useful, but WITHOUT

   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

   more details.

   You should have received a copy of the GNU General Public License along

   with this program.  If not, see <http:  www.gnu.org/licenses/>.  */

/* ----------------------------------------------------------------------------

   This code is commented throughout for use with Doxygen.

   --------------------------------------------------------------------------*/

/* Test l.mul, l.mac and l.macrc instructions */

#include "support.h"

#define T1 0xa6312f33

#define T2 0x0d4de375

#define T3 0x61ab48dc

#define MAC(x,y) asm volatile ("l.mac\t%0,%1" : : "r" (x), "r" (y))

#define MACRC macrc()

static inline long macrc() {

  long x;

  asm volatile ("l.macrc\t%0" : "=r" (x));

  return x;

}

long test_mul (long a, long b) {

  long t;

  int i;

  for (i = 0; i < 100; i++) {

    t = a * b;

    t += 153;

    a = t - a * 17;

    b = t + b * 13333;

    /*printf ("(%08x,%08x)", a, b);*/

  }

  return a;

}

long test_mac (long a, long b) {

  long t = 1234567;

  int i;

  for (i = 0; i < 100; i++) {

    MAC (a, b);

    if (i & 3) {

      a = t - a;

      b = t + a;

    } else {

      a = MACRC;

    }

    MAC (a, 3);

    MAC (a, 5);

    MAC (a, 7);

    //printf ("(%08x,%08x)", a, b);

  }

  return a;

}

long test_mul_mac (long a, long b) {

  long t = 1;

  int i;

  for (i = 0; i < 100; i++) {

    a = a * 119;

    MAC (a, b);

    MAC (b, 423490431);

    MAC (b, 113);

    MAC (a, 997);

    b = 87 * a * t;

    if (i & 3) {

      t = a * b;

      a = t - a;

      b = t + a;

    } else {

      a = MACRC;

    }

 //   printf ("(%08x,%08x)", a, b);

  }

  return a;

}

int main () {

  unsigned t1;

  unsigned t2;

  unsigned t3;

  printf ("%08lx\n", MACRC);

  MAC (888888887, 0x87654321);

  printf ("%08lx\n", MACRC);

  t1 = test_mul (888888887, 0x87654321);

  t2 = test_mac (888888887, 0x87654321);

  t3 = test_mul_mac (888888887, 0x87654321);

  printf ("%08x, expected %08x\n", t1, T1);

  printf ("%08x, expected %08x\n", t2, T2);

  printf ("%08x, expected %08x\n", t3, T3);

  report (t1 ^ t2 ^ t3 ^ T1 ^ T2 ^ T3 ^ 0xdeaddead);

  if (t1 != T1 || t2 != T2 || t3 != T3) {

    printf ("Test failed!\n");

    if (t1 != T1) exit (1);

    if (t2 != T2) exit (2);

    if (t3 != T3) exit (3);

  } else {

    printf ("Test succesful.\n");

    exit (0);

  }

  exit (0);

}