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