1 | /* Test mpz_gcd, mpz_gcdext, mpz_mul, mpz_tdiv_r, mpz_add, mpz_cmp, |
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2 | mpz_cmp_ui, mpz_init_set, mpz_set, mpz_clear. |
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3 | |
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4 | Copyright 1991, 1993, 1994, 1996, 1997, 2000, 2001, 2002, 2004 Free Software |
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5 | Foundation, Inc. |
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6 | |
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7 | This file is part of the GNU MP Library. |
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8 | |
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9 | The GNU MP Library is free software; you can redistribute it and/or modify |
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10 | it under the terms of the GNU Lesser General Public License as published by |
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11 | the Free Software Foundation; either version 2.1 of the License, or (at your |
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12 | option) any later version. |
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13 | |
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14 | The GNU MP Library is distributed in the hope that it will be useful, but |
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15 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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16 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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17 | License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License |
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20 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
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21 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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22 | MA 02111-1307, USA. */ |
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23 | |
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24 | #include <stdio.h> |
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25 | #include <stdlib.h> |
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26 | |
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27 | #include "gmp.h" |
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28 | #include "gmp-impl.h" |
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29 | #include "tests.h" |
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30 | |
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31 | void dump_abort _PROTO ((int, mpz_t, mpz_t)); |
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32 | void debug_mp _PROTO ((mpz_t, int)); |
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33 | |
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34 | void |
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35 | check_data (void) |
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36 | { |
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37 | static const struct { |
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38 | const char *a; |
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39 | const char *b; |
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40 | const char *want; |
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41 | } data[] = { |
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42 | /* This tickled a bug in gmp 4.1.2 mpn/x86/k6/gcd_finda.asm. */ |
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43 | { "0x3FFC000007FFFFFFFFFF00000000003F83FFFFFFFFFFFFFFF80000000000000001", |
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44 | "0x1FFE0007FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC000000000000000000000001", |
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45 | "5" } |
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46 | }; |
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47 | |
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48 | mpz_t a, b, got, want; |
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49 | int i; |
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50 | |
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51 | mpz_init (a); |
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52 | mpz_init (b); |
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53 | mpz_init (got); |
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54 | mpz_init (want); |
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55 | |
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56 | for (i = 0; i < numberof (data); i++) |
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57 | { |
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58 | mpz_set_str_or_abort (a, data[i].a, 0); |
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59 | mpz_set_str_or_abort (b, data[i].b, 0); |
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60 | mpz_set_str_or_abort (want, data[i].want, 0); |
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61 | mpz_gcd (got, a, b); |
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62 | MPZ_CHECK_FORMAT (got); |
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63 | if (mpz_cmp (got, want) != 0) |
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64 | { |
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65 | printf ("mpz_gcd wrong on data[%d]\n", i); |
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66 | printf (" a %s\n", data[i].a); |
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67 | printf (" b %s\n", data[i].b); |
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68 | mpz_trace (" a", a); |
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69 | mpz_trace (" b", b); |
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70 | mpz_trace (" want", want); |
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71 | mpz_trace (" got ", got); |
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72 | abort (); |
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73 | } |
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74 | } |
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75 | |
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76 | mpz_clear (a); |
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77 | mpz_clear (b); |
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78 | mpz_clear (got); |
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79 | mpz_clear (want); |
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80 | } |
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81 | |
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82 | int |
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83 | main (int argc, char **argv) |
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84 | { |
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85 | mpz_t op1, op2, x; |
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86 | mpz_t gcd, gcd2, s, t; |
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87 | mpz_t temp1, temp2; |
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88 | mp_size_t op1_size, op2_size, x_size; |
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89 | int i; |
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90 | int reps = 2000; |
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91 | gmp_randstate_ptr rands; |
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92 | mpz_t bs; |
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93 | unsigned long bsi, size_range; |
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94 | |
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95 | tests_start (); |
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96 | rands = RANDS; |
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97 | |
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98 | check_data (); |
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99 | |
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100 | mpz_init (bs); |
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101 | |
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102 | if (argc == 2) |
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103 | reps = atoi (argv[1]); |
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104 | |
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105 | mpz_init (op1); |
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106 | mpz_init (op2); |
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107 | mpz_init (x); |
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108 | mpz_init (gcd); |
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109 | mpz_init (gcd2); |
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110 | mpz_init (temp1); |
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111 | mpz_init (temp2); |
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112 | mpz_init (s); |
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113 | mpz_init (t); |
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114 | |
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115 | for (i = 0; i < reps; i++) |
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116 | { |
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117 | mpz_urandomb (bs, rands, 32); |
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118 | size_range = mpz_get_ui (bs) % 12 + 2; /* 0..8191 bit operands */ |
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119 | |
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120 | mpz_urandomb (bs, rands, size_range); |
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121 | op1_size = mpz_get_ui (bs); |
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122 | mpz_rrandomb (op1, rands, op1_size); |
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123 | |
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124 | mpz_urandomb (bs, rands, size_range); |
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125 | op2_size = mpz_get_ui (bs); |
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126 | mpz_rrandomb (op2, rands, op2_size); |
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127 | |
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128 | mpz_urandomb (bs, rands, size_range); |
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129 | x_size = mpz_get_ui (bs); |
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130 | mpz_rrandomb (x, rands, x_size); |
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131 | |
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132 | mpz_urandomb (bs, rands, 2); |
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133 | bsi = mpz_get_ui (bs); |
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134 | if ((bsi & 1) != 0) |
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135 | mpz_neg (op1, op1); |
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136 | if ((bsi & 2) != 0) |
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137 | mpz_neg (op2, op2); |
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138 | |
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139 | /* printf ("%ld %ld\n", SIZ (op1), SIZ (op2)); */ |
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140 | |
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141 | mpz_mul (op1, op1, x); |
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142 | mpz_mul (op2, op2, x); |
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143 | |
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144 | mpz_gcd (gcd, op1, op2); |
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145 | /* We know GCD will be at least X, since we multiplied both operands |
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146 | with it. */ |
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147 | if (mpz_cmp (gcd, x) < 0 && mpz_sgn (op1) != 0 && mpz_sgn (op2) != 0) |
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148 | dump_abort (i, op1, op2); |
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149 | |
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150 | if (mpz_fits_ulong_p (op2)) |
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151 | { |
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152 | mpz_gcd_ui (gcd2, op1, mpz_get_ui (op2)); |
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153 | if (mpz_cmp (gcd, gcd2)) |
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154 | dump_abort (i, op1, op2); |
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155 | } |
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156 | |
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157 | mpz_gcdext (gcd2, s, t, op1, op2); |
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158 | if (mpz_cmp (gcd, gcd2)) |
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159 | dump_abort (i, op1, op2); |
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160 | |
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161 | mpz_gcdext (gcd2, s, NULL, op1, op2); |
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162 | if (mpz_cmp (gcd, gcd2)) |
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163 | dump_abort (i, op1, op2); |
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164 | |
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165 | mpz_mul (temp1, s, op1); |
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166 | mpz_mul (temp2, t, op2); |
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167 | mpz_add (gcd2, temp1, temp2); |
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168 | if (mpz_cmp (gcd, gcd2)) |
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169 | dump_abort (i, op1, op2); |
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170 | } |
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171 | |
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172 | mpz_clear (bs); |
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173 | mpz_clear (op1); |
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174 | mpz_clear (op2); |
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175 | mpz_clear (x); |
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176 | mpz_clear (gcd); |
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177 | mpz_clear (gcd2); |
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178 | mpz_clear (temp1); |
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179 | mpz_clear (temp2); |
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180 | mpz_clear (s); |
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181 | mpz_clear (t); |
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182 | |
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183 | tests_end (); |
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184 | exit (0); |
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185 | } |
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186 | |
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187 | void |
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188 | dump_abort (int testnr, mpz_t op1, mpz_t op2) |
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189 | { |
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190 | fprintf (stderr, "ERROR in test %d\n", testnr); |
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191 | fprintf (stderr, "op1 = "); debug_mp (op1, -16); |
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192 | fprintf (stderr, "op2 = "); debug_mp (op2, -16); |
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193 | abort(); |
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194 | } |
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195 | |
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196 | void |
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197 | debug_mp (mpz_t x, int base) |
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198 | { |
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199 | mpz_out_str (stderr, base, x); fputc ('\n', stderr); |
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200 | } |
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