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/* cbasic.c. Test of Or1ksim basic C program functionality

   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 basic c functionality.  */

#define DEBUG 0 

#define DBGFINE 0

#include "support.h"

signed long test_cond(int i)

{

  switch(i) {

    case 1:

      i += 1;

      break;

    case -1:

      i -= 10;

      break;

    default:

      return i;

  }

  if (i == 2)   /* normaly i == 2 */

    i += 1;

  else

    i -= 10;

  if (i > 2)    /* normaly i == 3 */

    i += 1;

  else

    i -=10;

  if (i >= 4)   /* normaly i == 4 */

    i += 1;

  else

    i -= 10;

  if (i <= 5)   /* normaly i == 5 */

    i += 1;

  else

    i -= 10;

  if (i < 7)    /* normaly i == 6 */

    i += 1;

  else

    i -= 10;

  if (i != 666)   /* normaly i == 7 */

    i += 1;

  else

    i -= 10;

  return i;   /* with initial i == 1 return 8 */

}

signed long test_loops(int i)

{

  int j = 0;

  for(; i < 10; i++)

    j += 2;

  do {

    i -= 3;

  } while (j--);

  return i;

}

signed long test_arith(int i)

{

  int mul = 0, div = 0;

  int j;

  for(j = i; j < 40; j++) {

    mul += j*j*i;

#if 0

    report(mul);

#endif

    div += mul / (j+5);

#if 0

    report(div);

#endif

  }

  report (mul+div);

  return (mul + div);

}

signed long test_bitop(int i)

{

  int shl = 0, shr = 0, bit = 0;

  int j;

  for(j = i; j < 35; j++) {

    shl += 1 << j;

#if 0

    printf("%u. shl:%08lx", j, shl);

    report(shl);

#endif

    shr += 0x80000000 >> j;

#if 0

    printf("  shr:%08lx", shr);

    report(shr);

#endif

    bit += ((~j ^ 0x11223344) & 0x33557788) + (j | 0x11223344);

#if 0

    printf("  bit:%08lx\n", bit);

    report(bit);

#endif

  }

  return (shl + shr + bit);

}

signed long test_types(int i)

{

  unsigned char uc;

  signed char sc;

  unsigned short us;

  signed short ss;

  unsigned long ul;

  signed long sl;

  int j;

  i ^= 0x10203040;

  for(j = 0; j < 10; j++) {

    uc = i;

    sc = i;

    us = i;

    ss = i;

    ul = i;

    sl = i;

#if 0

    printf("%u. i:%08lx ", j, i);

    printf("uc:%08lx sc:%08lx ", uc, sc);

    report(uc);

    report(sc);

    printf("us:%08lx ss:%08lx ", us, ss);

    report(us);

    report(ss);

    printf("ul:%08lx sl:%08lx\n", ul, sl);

    report(ul);

    report(sl);

#endif

    i = uc + sc + us + ss + ul + sl;

  }

  return i;

}

signed long test_array(int i)

{

  char a1[] = "This test string MUST NOT be modified...";

  char a2[100];

  report(a1[5]);

  memcpy(a2, a1, 40);

  report(a1[5]);

  report(a2[5]);

  report(i);

  /* register reload test */

  i += a2[0] + a2[1] + a2[2] + a2[3] + a2[4] + a2[5] + a2[6] + a2[7]

     + a2[8] + a2[9] + a2[10] + a2[11] + a2[12] + a2[13] + a2[14] + a2[15]

     + a2[16] + a2[17] + a2[18] + a2[19] + a2[20] + a2[21] + a2[22] + a2[23]

     + a2[24] + a2[25] + a2[26] + a2[27] + a2[28] + a2[29] + a2[30] + a2[31]

     + a2[32] + a2[33] + a2[34] + a2[35] + a2[36] + a2[37] + a2[38] + a2[39];

  report(i);

  return i;

}

int main()

{

  signed long result1 = 0;

  signed long result2 = 0;

  signed long result3 = 0;

#if DEBUG

  printf("Start...\n");

#endif

  result1 = test_cond(1);

  result2 = test_cond(-1);

  result3 -= result1 + result2;

  report(result2);

#if DEBUG

  printf("After test_cond:   0x%08lx  0x%08lx\n", result1, result2);

#endif

  result1 = test_loops(1);

  result2 = test_loops(-1);

  result3 -= result1 + result2;

  report(result2);

#if DEBUG

  printf("After test_loops:  0x%08lx  0x%08lx\n", result1, result2);

#endif

  result1 = test_arith(1);

  result2 = test_arith(-1);

  result3 -= result1 + result2;

  report(result2);

#if DEBUG

  printf("After test_arith:  0x%08lx  0x%08lx\n", result1, result2);

#endif

  result1 = test_bitop(1);

  result2 = test_bitop(-1);

  result3 -= result1 + result2;

  report(result2);

#if DEBUG

  printf("After test_bitop:  0x%08lx  0x%08lx\n", result1, result2);

#endif

  result1 = test_types(1);

  result2 = test_types(-1);

  result3 -= result1 + result2;

  report(result2);

#if DEBUG

  printf("After test_types:  0x%08lx  0x%08lx\n", result1, result2);

#endif

  result1 = test_array(1);

  result2 = test_array(-1);

  result3 -= result1 + result2;

  report(result2);

#if DEBUG

  printf("After test_array:  0x%08lx  0x%08lx\n", result1, result2);

#endif

#ifdef XXX

#warning xxx

#endif

  printf("RESULT: 0x%08lx\n", result3 ^ 0x4bad2569 ^ 0xdeaddead);

  report(result3 ^ 0x4bad2569 ^ 0xdeaddead);

  exit(0);

}