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t-scan.c revision 1.1.1.2 
      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 http://www.gnu.org/licenses/.  */
     19 
     20 #include <stdio.h>
     21 #include <stdlib.h>
     22 
     23 #include "gmp.h"
     24 #include "gmp-impl.h"
     25 
     26 #include "tests.h"
     27 
     28 
     29 #define SIZE  ((mp_size_t) 3)
     30 mp_limb_t  x[SIZE+1];
     31 
     32 void
     33 check (void)
     34 {
     35   unsigned long  i, got, want;
     36 
     37   x[SIZE] = 1;
     38   for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
     39     {
     40       got = refmpn_scan1 (x, i);
     41       want = mpn_scan1 (x, i);
     42       if (got != want)
     43         {
     44           printf ("mpn_scan1\n");
     45           printf ("  i     %lu\n", i);
     46           printf ("  got   %lu\n", got);
     47           printf ("  want  %lu\n", want);
     48           mpn_trace ("  x    ", x, SIZE);
     49           abort ();
     50         }
     51     }
     52 
     53   x[SIZE] = 0;
     54   for (i = 0; i < SIZE*GMP_NUMB_BITS; i++)
     55     {
     56       got = refmpn_scan0 (x, i);
     57       want = mpn_scan0 (x, i);
     58       if (got != want)
     59         {
     60           printf ("mpn_scan0\n");
     61           printf ("  i     %lu\n", i);
     62           printf ("  got   %lu\n", got);
     63           printf ("  want  %lu\n", want);
     64           mpn_trace ("  x    ", x, SIZE);
     65           abort ();
     66         }
     67     }
     68 }
     69 
     70 void
     71 check_twobits (void)
     72 {
     73 #define TWOBITS(a, b) \
     74   ((CNST_LIMB(1) << (a)) | (CNST_LIMB(1) << (b)))
     75 
     76   refmpn_zero (x, SIZE);
     77   x[0] = TWOBITS (1, 0);
     78   check ();
     79 
     80   refmpn_zero (x, SIZE);
     81   x[0] = TWOBITS (GMP_NUMB_BITS-1, 1);
     82   check ();
     83 
     84   refmpn_zero (x, SIZE);
     85   x[0] = CNST_LIMB(1);
     86   x[1] = CNST_LIMB(1);
     87   check ();
     88 
     89   refmpn_zero (x, SIZE);
     90   x[0] = CNST_LIMB(1) << (GMP_NUMB_BITS-1);
     91   x[1] = CNST_LIMB(1);
     92   check ();
     93 
     94   refmpn_zero (x, SIZE);
     95   x[1] = TWOBITS (1, 0);
     96   check ();
     97 
     98   refmpn_zero (x, SIZE);
     99   x[1] = CNST_LIMB(1);
    100   x[2] = CNST_LIMB(1);
    101   check ();
    102 }
    103 
    104 /* This is unused, it takes too long, especially on 64-bit systems. */
    105 void
    106 check_twobits_exhaustive (void)
    107 {
    108   unsigned long  i, j;
    109 
    110   for (i = 0; i < GMP_NUMB_BITS * SIZE; i++)
    111     {
    112       for (j = 0; j < GMP_NUMB_BITS * SIZE; j++)
    113         {
    114           refmpn_zero (x, SIZE);
    115           refmpn_setbit (x, i);
    116           refmpn_setbit (x, j);
    117           check ();
    118         }
    119     }
    120 }
    121 
    122 void
    123 check_rand (void)
    124 {
    125   int  i;
    126 
    127   for (i = 0; i < 100; i++)
    128     {
    129       refmpn_random2 (x, SIZE);
    130       check ();
    131     }
    132 }
    133 
    134 int
    135 main (void)
    136 {
    137   mp_trace_base = -16;
    138   tests_start ();
    139 
    140   check_twobits ();
    141   check_rand ();
    142 
    143   tests_end ();
    144   exit (0);
    145 }
    146