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t-scan.c revision 1.1.1.4 
      1 /* Test mpn_scan0 and mpn_scan1.
      2 
      3 Copyright 2002 Free Software Foundation, Inc.
      4 
      5 This file is part of the GNU MP Library test suite.
      6 
      7 The GNU MP Library test suite is free software; you can redistribute it
      8 and/or modify it under the terms of the GNU General Public License as
      9 published by the Free Software Foundation; either version 3 of the License,
     10 or (at your option) any later version.
     11 
     12 The GNU MP Library test suite is distributed in the hope that it will be
     13 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
     14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
     15 Public License for more details.
     16 
     17 You should have received a copy of the GNU General Public License along with
     18 the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
     19 
     20 #include <stdio.h>
     21 #include <stdlib.h>
     22 
     23 #include "gmp-impl.h"
     24 
     25 #include "tests.h"
     26 
     27 
     28 #define SIZE  ((mp_size_t) 3)
     29 mp_limb_t  x[SIZE+1];
     30 
     31 void
     32 check (void)
     33 {
     34   unsigned long  i, got, want;
     35 
     36   x[SIZE] = 1;
     37   for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
     38     {
     39       got = refmpn_scan1 (x, i);
     40       want = mpn_scan1 (x, i);
     41       if (got != want)
     42         {
     43           printf ("mpn_scan1\n");
     44           printf ("  i     %lu\n", i);
     45           printf ("  got   %lu\n", got);
     46           printf ("  want  %lu\n", want);
     47           mpn_trace ("  x    ", x, SIZE);
     48           abort ();
     49         }
     50     }
     51 
     52   x[SIZE] = 0;
     53   for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
     54     {
     55       got = refmpn_scan0 (x, i);
     56       want = mpn_scan0 (x, i);
     57       if (got != want)
     58         {
     59           printf ("mpn_scan0\n");
     60           printf ("  i     %lu\n", i);
     61           printf ("  got   %lu\n", got);
     62           printf ("  want  %lu\n", want);
     63           mpn_trace ("  x    ", x, SIZE);
     64           abort ();
     65         }
     66     }
     67 }
     68 
     69 void
     70 check_twobits (void)
     71 {
     72 #define TWOBITS(a, b) \
     73   ((CNST_LIMB(1) << (a)) | (CNST_LIMB(1) << (b)))
     74 
     75   refmpn_zero (x, SIZE);
     76   x[0] = TWOBITS (1, 0);
     77   check ();
     78 
     79   refmpn_zero (x, SIZE);
     80   x[0] = TWOBITS (GMP_NUMB_BITS-1, 1);
     81   check ();
     82 
     83   refmpn_zero (x, SIZE);
     84   x[0] = CNST_LIMB(1);
     85   x[1] = CNST_LIMB(1);
     86   check ();
     87 
     88   refmpn_zero (x, SIZE);
     89   x[0] = CNST_LIMB(1) << (GMP_NUMB_BITS-1);
     90   x[1] = CNST_LIMB(1);
     91   check ();
     92 
     93   refmpn_zero (x, SIZE);
     94   x[1] = TWOBITS (1, 0);
     95   check ();
     96 
     97   refmpn_zero (x, SIZE);
     98   x[1] = CNST_LIMB(1);
     99   x[2] = CNST_LIMB(1);
    100   check ();
    101 }
    102 
    103 /* This is unused, it takes too long, especially on 64-bit systems. */
    104 void
    105 check_twobits_exhaustive (void)
    106 {
    107   unsigned long  i, j;
    108 
    109   for (i = 0; i < GMP_NUMB_BITS * SIZE; i++)
    110     {
    111       for (j = 0; j < GMP_NUMB_BITS * SIZE; j++)
    112         {
    113           refmpn_zero (x, SIZE);
    114           refmpn_setbit (x, i);
    115           refmpn_setbit (x, j);
    116           check ();
    117         }
    118     }
    119 }
    120 
    121 void
    122 check_rand (void)
    123 {
    124   int  i;
    125 
    126   for (i = 0; i < 100; i++)
    127     {
    128       refmpn_random2 (x, SIZE);
    129       check ();
    130     }
    131 }
    132 
    133 int
    134 main (void)
    135 {
    136   mp_trace_base = -16;
    137   tests_start ();
    138 
    139   check_twobits ();
    140   check_rand ();
    141 
    142   tests_end ();
    143   exit (0);
    144 }
    145