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/* Miscellaneous simulator utilities.

   Copyright (C) 1997, 2007, 2008 Free Software Foundation, Inc.

   Contributed by Cygnus Support.

This file is part of GDB, the GNU debugger.

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/>.  */

#include <stdio.h>

void

gen_struct (void)

{

  printf ("\n");

  printf ("typedef struct _test_tuples {\n");

  printf ("  int line;\n");

  printf ("  int row;\n");

  printf ("  int col;\n");

  printf ("  long long val;\n");

  printf ("  long long check;\n");

  printf ("} test_tuples;\n");

  printf ("\n");

  printf ("typedef struct _test_spec {\n");

  printf ("  const char *file;\n");

  printf ("  const char *macro;\n");

  printf ("  int nr_rows;\n");

  printf ("  int nr_cols;\n");

  printf ("  test_tuples *tuples;\n");

  printf ("} test_spec;\n");

}

void

gen_bit (int bitsize,

         int msb,

         const char *macro,

         int nr_bits)

{

  int i;

  printf ("\n/* Test the %s macro */\n", macro);

  printf ("test_tuples %s_tuples[%d] = {\n", macro, nr_bits);

  for (i = 0; i < nr_bits; i++)

    {

      /* compute what we think the value is */

      unsigned long long bit = 1;

      if (msb == 0)

        bit <<= nr_bits - i - 1;

      else

        bit <<= i;

      if (bitsize == 32)

        bit = (unsigned) bit; /* truncate it! */

      /* write it out */

      printf ("  { __LINE__, ");

      printf ("%d, %2d, ", -1, i);

      printf ("%s (%2d), ", macro, i);

      printf ("UNSIGNED64 (0x%08lx%08lx), ",

              (long) (bit >> 32), (long) bit);

      printf ("},\n");

    }

  printf ("};\n");

  printf ("\n");

  printf ("test_spec %s_test = { __FILE__, \"%s\", 1, %d, %s_tuples, };\n",

          macro, macro, nr_bits, macro);

  printf ("\n");

}

void

gen_enum (const char *macro,

          int nr_bits)

{

  int i;

  printf ("\n/* Test the %s macro in an enum */\n", macro);

  printf ("enum enum_%s {\n", macro);

  for (i = 0; i < nr_bits; i++)

    {

      printf ("  elem_%s_%d = %s (%d),\n", macro, i, macro, i);

    }

  printf ("};\n");

  printf ("\n");

}

void

gen_mask (int bitsize,

          const char *msb,

          const char *macro,

          int nr_bits)

{

  int l;

  int h;

  printf ("\n/* Test the %s%s macro */\n", msb, macro);

  printf ("test_tuples %s_tuples[%d][%d] = {\n", macro, nr_bits, nr_bits);

  for (l = 0; l < nr_bits; l++)

    {

      printf ("  {\n");

      for (h = 0; h < nr_bits; h++)

        {

          printf ("    { __LINE__, ");

          if ((strcmp (msb, "MS") == 0 && l <= h)

              || (strcmp (msb, "MS") != 0 && l >= h)

              || (strcmp (macro, "") == 0))

            {

              /* compute the mask */

              unsigned long long mask = 0;

              int b;

              for (b = 0; b < nr_bits; b++)

                {

                  unsigned long long bit = 1;

                  if (strcmp (msb, "MS") == 0)

                    {

                      if ((l <= b && b <= h)

                          || (h < l && (b <= h || b >= l)))

                        bit <<= (nr_bits - b - 1);

                      else

                        bit = 0;

                    }

                  else

                    {

                      if ((l >= b && b >= h)

                          || (h > l && (b >= h || b <= l)))

                        bit <<= b;

                      else

                        bit = 0;

                    }

                  mask |= bit;

                }

              if (bitsize == 32)

                mask = (unsigned long) mask;

              printf ("%d, %d, ", l, h);

              printf ("%s%s (%2d, %2d), ", msb, macro, l, h);

              printf ("UNSIGNED64 (0x%08lx%08lx), ",

                      (long) (mask >> 32), (long) mask);

            }

          else

            printf ("-1, -1, ");

          printf ("},\n");

        }

      printf ("  },\n");

    }

  printf ("};\n");

  printf ("\n");

  printf ("test_spec %s_test = { __FILE__, \"%s%s\", %d, %d, &%s_tuples[0][0], };\n",

          macro, msb, macro, nr_bits, nr_bits, macro);

  printf ("\n");

}

void

usage (int reason)

{

  fprintf (stderr, "Usage:\n");

  fprintf (stderr, "  bits-gen <nr-bits> <msb> <byte-order>\n");

  fprintf (stderr, "Generate a test case for the simulator bit manipulation code\n");

  fprintf (stderr, "  <nr-bits> = { 32 | 64 }\n");

  fprintf (stderr, "  <msb> = { 0 | { 31 | 63 } }\n");

  fprintf (stderr, "  <byte-order> = { big | little }\n");

  switch (reason)

    {

    case 1: fprintf (stderr, "Wrong number of arguments\n");

      break;

    case 2:

      fprintf (stderr, "Invalid <nr-bits> argument\n");

      break;

    case 3:

      fprintf (stderr, "Invalid <msb> argument\n");

      break;

    case 4:

      fprintf (stderr, "Invalid <byte-order> argument\n");

      break;

    default:

    }

  exit (1);

}

int

main (argc, argv)

     int argc;

     char **argv;

{

  int bitsize;

  int msb;

  char *ms;

  int big_endian;

  if (argc != 4)

    usage (1);

  if (strcmp (argv [1], "32") == 0)

    bitsize = 32;

  else if (strcmp (argv [1], "64") == 0)

    bitsize = 64;

  else

    usage (2);

  if (strcmp (argv [2], "0") == 0)

    msb = 0;

  else if (strcmp (argv [2], "31") == 0 && bitsize == 32)

    msb = 31;

  else if (strcmp (argv [2], "63") == 0 && bitsize == 64)

    msb = 63;

  else

    usage (3);

  if (msb == 0)

    ms = "MS";

  else

    ms = "LS";

  if (strcmp (argv [3], "big") == 0)

    big_endian = 1;

  else if (strcmp (argv [3], "little") == 0)

    big_endian = 0;

  else

    usage (4);

  printf ("#define WITH_TARGET_WORD_BITSIZE %d\n", bitsize);

  printf ("#define WITH_TARGET_WORD_MSB %d\n", msb);

  printf ("#define WITH_HOST_WORD_BITSIZE %d\n", sizeof (int) * 8);

  printf ("#define WITH_TARGET_BYTE_ORDER %s\n", big_endian ? "BIG_ENDIAN" : "LITTLE_ENDIAN");

  printf ("\n");

  printf ("#define SIM_BITS_INLINE (ALL_H_INLINE)\n");

  printf ("\n");

  printf ("#define ASSERT(X) do { if (!(X)) abort(); } while (0)\n");

  printf ("\n");

  printf ("#include \"sim-basics.h\"\n");

  gen_struct ();

  printf ("#define DO_BIT_TESTS\n");

  gen_bit ( 4, msb, "BIT4",  4);

  gen_bit ( 5, msb, "BIT5",  5);

  gen_bit ( 8, msb, "BIT8",  8);

  gen_bit (10, msb, "BIT10", 10);

  gen_bit (16, msb, "BIT16", 16);

  gen_bit (32, msb, "BIT32", 32);

  gen_bit (64, msb, "BIT64", 64);

  gen_bit (bitsize, msb, "BIT", 64);

  gen_bit ( 8,  8 - 1, "LSBIT8",   8);

  gen_bit (16, 16 - 1, "LSBIT16", 16);

  gen_bit (32, 32 - 1, "LSBIT32", 32);

  gen_bit (64, 64 - 1, "LSBIT64", 64);

  gen_bit (bitsize, bitsize - 1, "LSBIT",   64);

  gen_bit ( 8,  0, "MSBIT8",   8);

  gen_bit (16,  0, "MSBIT16", 16);

  gen_bit (32,  0, "MSBIT32", 32);

  gen_bit (64,  0, "MSBIT64", 64);

  gen_bit (bitsize,  0, "MSBIT",   64);

  printf ("test_spec *(bit_tests[]) = {\n");

  printf ("  &BIT4_test,\n");

  printf ("  &BIT5_test,\n");

  printf ("  &BIT8_test,\n");

  printf ("  &BIT10_test,\n");

  printf ("  &BIT16_test,\n");

  printf ("  &BIT32_test,\n");

  printf ("  &BIT64_test,\n");

  printf ("  &BIT_test,\n");

  printf ("  &LSBIT8_test,\n");

  printf ("  &LSBIT16_test,\n");

  printf ("  &LSBIT32_test,\n");

  printf ("  &LSBIT64_test,\n");

  printf ("  &LSBIT_test,\n");

  printf ("  &MSBIT8_test,\n");

  printf ("  &MSBIT16_test,\n");

  printf ("  &MSBIT32_test,\n");

  printf ("  &MSBIT64_test,\n");

  printf ("  &MSBIT_test,\n");

  printf ("  0,\n");

  printf ("};\n\n");

  gen_enum ("BIT",   64);

  gen_enum ("LSBIT", 64);

  gen_enum ("MSBIT", 64);

  gen_enum ("BIT32",   32);

  gen_enum ("LSBIT32", 32);

  gen_enum ("MSBIT32", 32);

  printf ("#define DO_MASK_TESTS\n");

  gen_mask ( 8, ms, "MASK8",  8);

  gen_mask (16, ms, "MASK16", 16);

  gen_mask (32, ms, "MASK32", 32);

  gen_mask (64, ms, "MASK64", 64);

  gen_mask (bitsize, ms, "MASK", 64);

  printf ("test_spec *(mask_tests[]) = {\n");

  printf ("  &MASK8_test,\n");

  printf ("  &MASK16_test,\n");

  printf ("  &MASK32_test,\n");

  printf ("  &MASK64_test,\n");

  printf ("  &MASK_test,\n");

  printf ("  0,\n");

  printf ("};\n\n");

  return 0;

}