[gcc] GCC 4.5.0=>4.5.1

gcc/gmp/gen-bases.c

-/* Generate mp_bases data.
-
-Copyright 1991, 1993, 1994, 1996, 2000, 2002, 2004 Free Software Foundation,
-Inc.
-
-This file is part of the GNU MP Library.
-
-The GNU MP Library is free software; you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 3 of the License, or (at your
-option) any later version.
-
-The GNU MP Library 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 Lesser General Public
-License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
-
-#include <math.h>
-
-#include "dumbmp.c"
-
-
-int    chars_per_limb;
-double chars_per_bit_exactly;
-mpz_t  big_base;
-int    normalization_steps;
-mpz_t  big_base_inverted;
-
-mpz_t  t;
-
-#define POW2_P(n)  (((n) & ((n) - 1)) == 0)
-
-unsigned int
-ulog2 (unsigned int x)
-{
-  unsigned int i;
-  for (i = 0;  x != 0;  i++)
-    x >>= 1;
-  return i;
-}
-
-void
-generate (int limb_bits, int nail_bits, int base)
-{
-  int  numb_bits = limb_bits - nail_bits;
-
-  mpz_set_ui (t, 1L);
-  mpz_mul_2exp (t, t, numb_bits);
-  mpz_set_ui (big_base, 1L);
-  chars_per_limb = 0;
-  for (;;)
-    {
-      mpz_mul_ui (big_base, big_base, (long) base);
-      if (mpz_cmp (big_base, t) > 0)
-        break;
-      chars_per_limb++;
-    }
-
-  chars_per_bit_exactly = 0.69314718055994530942 / log ((double) base);
-
-  mpz_ui_pow_ui (big_base, (long) base, (long) chars_per_limb);
-
-  normalization_steps = limb_bits - mpz_sizeinbase (big_base, 2);
-
-  mpz_set_ui (t, 1L);
-  mpz_mul_2exp (t, t, 2*limb_bits - normalization_steps);
-  mpz_tdiv_q (big_base_inverted, t, big_base);
-  mpz_set_ui (t, 1L);
-  mpz_mul_2exp (t, t, limb_bits);
-  mpz_sub (big_base_inverted, big_base_inverted, t);
-}
-
-void
-header (int limb_bits, int nail_bits)
-{
-  int  numb_bits = limb_bits - nail_bits;
-
-  generate (limb_bits, nail_bits, 10);
-
-  printf ("/* This file generated by gen-bases.c - DO NOT EDIT. */\n");
-  printf ("\n");
-  printf ("#if GMP_NUMB_BITS != %d\n", numb_bits);
-  printf ("Error, error, this data is for %d bits\n", numb_bits);
-  printf ("#endif\n");
-  printf ("\n");
-  printf ("/* mp_bases[10] data, as literal values */\n");
-  printf ("#define MP_BASES_CHARS_PER_LIMB_10      %d\n", chars_per_limb);
-  printf ("#define MP_BASES_BIG_BASE_10            CNST_LIMB(0x");
-  mpz_out_str (stdout, 16, big_base);
-  printf (")\n");
-  printf ("#define MP_BASES_BIG_BASE_INVERTED_10   CNST_LIMB(0x");
-  mpz_out_str (stdout, 16, big_base_inverted);
-  printf (")\n");
-  printf ("#define MP_BASES_NORMALIZATION_STEPS_10 %d\n", normalization_steps);
-}
-
-void
-table (int limb_bits, int nail_bits)
-{
-  int  numb_bits = limb_bits - nail_bits;
-  int  base;
-
-  printf ("/* This file generated by gen-bases.c - DO NOT EDIT. */\n");
-  printf ("\n");
-  printf ("#include \"gmp.h\"\n");
-  printf ("#include \"gmp-impl.h\"\n");
-  printf ("\n");
-  printf ("#if GMP_NUMB_BITS != %d\n", numb_bits);
-  printf ("Error, error, this data is for %d bits\n", numb_bits);
-  printf ("#endif\n");
-  printf ("\n");
-  puts ("const struct bases mp_bases[257] =\n{");
-  puts ("  /*   0 */ { 0, 0.0, 0 },");
-  puts ("  /*   1 */ { 0, 1e37, 0 },");
-  for (base = 2; base <= 256; base++)
-    {
-      generate (limb_bits, nail_bits, base);
-
-      printf ("  /* %3u */ { ", base);
-      if (POW2_P (base))
-        {
-          printf ("%u, %.16f, 0x%x },\n",
-                  chars_per_limb, chars_per_bit_exactly, ulog2 (base) - 1);
-        }
-      else
-        {
-          printf ("%u, %.16f, CNST_LIMB(0x",
-                  chars_per_limb, chars_per_bit_exactly);
-          mpz_out_str (stdout, 16, big_base);
-          printf ("), CNST_LIMB(0x");
-          mpz_out_str (stdout, 16, big_base_inverted);
-          printf (") },\n");
-        }
-    }
-
-  puts ("};");
-}
-
-int
-main (int argc, char **argv)
-{
-  int  limb_bits, nail_bits;
-
-  mpz_init (big_base);
-  mpz_init (big_base_inverted);
-  mpz_init (t);
-
-  if (argc != 4)
-    {
-      fprintf (stderr, "Usage: gen-bases <header|table> <limbbits> <nailbits>\n");
-      exit (1);
-    }
-
-  limb_bits = atoi (argv[2]);
-  nail_bits = atoi (argv[3]);
-
-  if (limb_bits <= 0
-      || nail_bits < 0
-      || nail_bits >= limb_bits)
-    {
-      fprintf (stderr, "Invalid limb/nail bits: %d %d\n",
-               limb_bits, nail_bits);
-      exit (1);
-    }
-
-  if (strcmp (argv[1], "header") == 0)
-    header (limb_bits, nail_bits);
-  else if (strcmp (argv[1], "table") == 0)
-    table (limb_bits, nail_bits);
-  else
-    {
-      fprintf (stderr, "Invalid header/table choice: %s\n", argv[1]);
-      exit (1);
-    }
-
-  return 0;
-}