1 | /* Check the values of some constants. |
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2 | |
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3 | Copyright 2000, 2001, 2002 Free Software Foundation, Inc. |
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4 | |
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5 | This file is part of the GNU MP Library. |
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6 | |
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7 | The GNU MP Library is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU Lesser General Public License as published by |
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9 | the Free Software Foundation; either version 2.1 of the License, or (at your |
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10 | option) any later version. |
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11 | |
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12 | The GNU MP Library is distributed in the hope that it will be useful, but |
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13 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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15 | License for more details. |
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16 | |
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17 | You should have received a copy of the GNU Lesser General Public License |
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18 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
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19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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20 | MA 02111-1307, USA. */ |
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21 | |
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22 | #include <stdio.h> |
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23 | #include <stdlib.h> |
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24 | #include "gmp.h" |
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25 | |
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26 | #ifdef ULONG_MAX |
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27 | char *ulong_max_def = "defined"; |
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28 | #else |
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29 | char *ulong_max_def = "not defined"; |
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30 | #endif |
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31 | #ifdef LONG_MAX |
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32 | char *long_max_def = "defined"; |
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33 | #else |
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34 | char *long_max_def = "not defined"; |
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35 | #endif |
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36 | |
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37 | #ifdef UINT_MAX |
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38 | char *uint_max_def = "defined"; |
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39 | #else |
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40 | char *uint_max_def = "not defined"; |
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41 | #endif |
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42 | #ifdef INT_MAX |
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43 | char *int_max_def = "defined"; |
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44 | #else |
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45 | char *int_max_def = "not defined"; |
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46 | #endif |
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47 | |
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48 | #ifdef USHRT_MAX |
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49 | char *ushrt_max_def = "defined"; |
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50 | #else |
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51 | char *ushrt_max_def = "not defined"; |
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52 | #endif |
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53 | #ifdef SHRT_MAX |
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54 | char *shrt_max_def = "defined"; |
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55 | #else |
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56 | char *shrt_max_def = "not defined"; |
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57 | #endif |
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58 | |
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59 | #include "gmp-impl.h" |
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60 | #include "longlong.h" |
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61 | |
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62 | |
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63 | #ifdef _LONG_LONG_LIMB |
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64 | #define LL(l,ll) ll |
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65 | #else |
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66 | #define LL(l,ll) l |
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67 | #endif |
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68 | |
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69 | #if __GMP_MP_SIZE_T_INT |
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70 | #define SS(i,l) i |
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71 | #else |
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72 | #define SS(i,l) l |
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73 | #endif |
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74 | |
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75 | |
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76 | #define CHECK_LIMB_S(x, xname, y, yname) \ |
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77 | do { \ |
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78 | if ((x) != (y)) \ |
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79 | { \ |
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80 | printf (LL("%s == %lx, but %s == %lx\n", \ |
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81 | "%s == %llx, but %s == %llx\n"), \ |
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82 | xname, x, yname, y); \ |
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83 | error = 1; \ |
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84 | } \ |
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85 | } while (0) |
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86 | |
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87 | #define CHECK_INT_S(x, xname, y, yname) \ |
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88 | do { \ |
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89 | if ((x) != (y)) \ |
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90 | { \ |
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91 | printf ("%s == %d, but %s == %d\n", xname, x, yname, y); \ |
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92 | error = 1; \ |
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93 | } \ |
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94 | } while (0) |
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95 | |
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96 | |
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97 | |
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98 | #define CHECK_CONDITION_S(x, xname) \ |
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99 | do { \ |
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100 | if (!(x)) \ |
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101 | { \ |
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102 | printf ("%s is false\n", xname); \ |
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103 | error = 1; \ |
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104 | } \ |
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105 | } while (0) |
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106 | |
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107 | |
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108 | /* How many bits seem to work in the given type. */ |
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109 | #define CALC_BITS(result, type) \ |
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110 | do { \ |
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111 | type n = 1; \ |
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112 | result = 0; \ |
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113 | while (n != 0) \ |
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114 | { \ |
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115 | n <<= 1; \ |
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116 | result++; \ |
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117 | } \ |
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118 | } while (0) |
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119 | |
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120 | #define CHECK_BITS_S(constant, constant_name, type) \ |
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121 | do { \ |
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122 | int calculated; \ |
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123 | CALC_BITS (calculated, type); \ |
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124 | if (calculated != constant) \ |
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125 | { \ |
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126 | printf ("%s == %d, but calculated %d\n", \ |
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127 | constant_name, constant, calculated); \ |
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128 | error = 1; \ |
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129 | } \ |
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130 | } while (0) |
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131 | |
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132 | |
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133 | #define CHECK_HIGHBIT_S(value, value_name, type, format) \ |
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134 | do { \ |
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135 | type n = value; \ |
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136 | if (n == 0) \ |
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137 | { \ |
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138 | printf ("%s == 0\n", value_name); \ |
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139 | error = 1; \ |
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140 | } \ |
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141 | n <<= 1; \ |
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142 | if (n != 0) \ |
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143 | { \ |
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144 | printf ("%s << 1 = ", value_name); \ |
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145 | printf (format, n); \ |
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146 | printf (" != 0\n"); \ |
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147 | error = 1; \ |
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148 | } \ |
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149 | } while (0) |
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150 | |
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151 | |
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152 | #define CHECK_MAX_S(max_val, max_name, min_val, min_name, type, format) \ |
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153 | do { \ |
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154 | type maxval = max_val; \ |
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155 | type minval = min_val; \ |
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156 | type n = maxval; \ |
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157 | n++; \ |
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158 | if (n != minval) \ |
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159 | { \ |
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160 | printf ("%s + 1 = ", max_name); \ |
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161 | printf (format, n); \ |
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162 | printf (" != %s = ", min_name); \ |
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163 | printf (format, minval); \ |
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164 | printf ("\n"); \ |
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165 | error = 1; \ |
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166 | } \ |
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167 | if (maxval <= minval) \ |
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168 | { \ |
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169 | printf ("%s = ", max_name); \ |
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170 | printf (format, maxval); \ |
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171 | printf (" <= %s = ", min_name); \ |
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172 | printf (format, minval); \ |
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173 | printf ("\n"); \ |
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174 | error = 1; \ |
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175 | } \ |
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176 | } while (0) |
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177 | |
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178 | |
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179 | #if HAVE_STRINGIZE |
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180 | #define CHECK_LIMB(x,y) CHECK_LIMB_S (x, #x, y, #y) |
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181 | #define CHECK_INT(x,y) CHECK_INT_S (x, #x, y, #y) |
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182 | #define CHECK_CONDITION(x) CHECK_CONDITION_S (x, #x) |
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183 | #define CHECK_BITS(c,t) CHECK_BITS_S (c, #c, t) |
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184 | #define CHECK_MAX(m,n,t,f) CHECK_MAX_S (m, #m, n, #n, t, f) |
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185 | #define CHECK_HIGHBIT(n,t,f) CHECK_HIGHBIT_S (n, #n, t, f) |
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186 | #else |
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187 | #define CHECK_LIMB(x,y) CHECK_LIMB_S (x, "x", y, "y") |
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188 | #define CHECK_INT(x,y) CHECK_INT_S (x, "x", y, "y") |
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189 | #define CHECK_CONDITION(x) CHECK_CONDITION_S (x, "x") |
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190 | #define CHECK_BITS(c,t) CHECK_BITS_S (c, "c", t) |
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191 | #define CHECK_MAX(m,n,t,f) CHECK_MAX_S (m, "m", n, "n", t, f) |
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192 | #define CHECK_HIGHBIT(n,t,f) CHECK_HIGHBIT_S (n, "n", t, f) |
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193 | #endif |
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194 | |
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195 | |
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196 | /* The tests below marked "Bad!" fail on Cray T90 systems, where int, short |
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197 | and mp_size_t are 48 bits or some such but don't wraparound in a plain |
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198 | twos complement fashion. In particular, |
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199 | |
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200 | INT_HIGHBIT << 1 = 0xFFFFC00000000000 != 0 |
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201 | INT_MAX + 1 = 35184372088832 != INT_MIN = -35184372088832 |
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202 | |
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203 | This is a bit bizarre, but doesn't matter because GMP doesn't rely on any |
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204 | particular overflow behaviour for int or short, only for mp_limb_t. */ |
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205 | |
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206 | int |
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207 | main (int argc, char *argv[]) |
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208 | { |
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209 | int error = 0; |
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210 | |
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211 | CHECK_INT (BYTES_PER_MP_LIMB, sizeof(mp_limb_t)); |
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212 | CHECK_INT (mp_bits_per_limb, BITS_PER_MP_LIMB); |
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213 | CHECK_INT (__GMP_BITS_PER_MP_LIMB, BITS_PER_MP_LIMB); |
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214 | |
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215 | CHECK_BITS (BITS_PER_MP_LIMB, mp_limb_t); |
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216 | CHECK_BITS (BITS_PER_ULONG, unsigned long); |
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217 | |
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218 | CHECK_HIGHBIT (GMP_LIMB_HIGHBIT, mp_limb_t, LL("0x%lX","0x%llX")); |
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219 | CHECK_HIGHBIT (ULONG_HIGHBIT, unsigned long, "0x%lX"); |
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220 | CHECK_HIGHBIT (UINT_HIGHBIT, unsigned int, "0x%X"); |
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221 | CHECK_HIGHBIT (USHRT_HIGHBIT, unsigned short, "0x%hX"); |
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222 | CHECK_HIGHBIT (LONG_HIGHBIT, long, "0x%lX"); |
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223 | #if 0 /* Bad! */ |
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224 | CHECK_HIGHBIT (INT_HIGHBIT, int, "0x%X"); |
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225 | CHECK_HIGHBIT (SHRT_HIGHBIT, short, "0x%hX"); |
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226 | #endif |
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227 | |
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228 | #if 0 /* Bad! */ |
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229 | CHECK_MAX (LONG_MAX, LONG_MIN, long, "%ld"); |
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230 | CHECK_MAX (INT_MAX, INT_MIN, int, "%d"); |
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231 | CHECK_MAX (SHRT_MAX, SHRT_MIN, short, "%hd"); |
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232 | #endif |
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233 | CHECK_MAX (ULONG_MAX, 0, unsigned long, "%lu"); |
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234 | CHECK_MAX (UINT_MAX, 0, unsigned int, "%u"); |
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235 | CHECK_MAX (USHRT_MAX, 0, unsigned short, "%hu"); |
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236 | #if 0 /* Bad! */ |
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237 | CHECK_MAX (MP_SIZE_T_MAX, MP_SIZE_T_MIN, mp_size_t, SS("%d","%ld")); |
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238 | #endif |
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239 | |
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240 | /* UHWtype should have at least enough bits for half a UWtype */ |
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241 | { |
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242 | int bits_per_UWtype, bits_per_UHWtype; |
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243 | CALC_BITS (bits_per_UWtype, UWtype); |
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244 | CALC_BITS (bits_per_UHWtype, UHWtype); |
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245 | CHECK_CONDITION (2*bits_per_UHWtype >= bits_per_UWtype); |
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246 | } |
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247 | |
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248 | { |
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249 | mp_limb_t modlimb_inverse_3_calc; |
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250 | modlimb_invert (modlimb_inverse_3_calc, CNST_LIMB(3)); |
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251 | CHECK_LIMB (MODLIMB_INVERSE_3 & GMP_NUMB_MASK, |
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252 | modlimb_inverse_3_calc & GMP_NUMB_MASK); |
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253 | } |
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254 | |
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255 | { |
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256 | mp_limb_t MODLIMB_INVERSE_3_times_3 |
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257 | = (MODLIMB_INVERSE_3 * CNST_LIMB(3)) & GMP_NUMB_MASK; |
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258 | CHECK_LIMB (MODLIMB_INVERSE_3_times_3, CNST_LIMB(1)); |
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259 | } |
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260 | |
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261 | #ifdef PP_INVERTED |
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262 | { |
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263 | mp_limb_t pp_inverted_calc; |
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264 | invert_limb (pp_inverted_calc, PP); |
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265 | CHECK_LIMB (PP_INVERTED, pp_inverted_calc); |
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266 | } |
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267 | #endif |
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268 | |
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269 | if (argc >= 2 || error) |
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270 | { |
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271 | int bits; |
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272 | |
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273 | printf ("\n"); |
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274 | printf ("After gmp.h,\n"); |
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275 | printf (" ULONG_MAX %s\n", ulong_max_def); |
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276 | printf (" LONG_MAX %s\n", long_max_def); |
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277 | printf (" UINT_MAX %s\n", uint_max_def); |
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278 | printf (" INT_MAX %s\n", int_max_def); |
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279 | printf (" USHRT_MAX %s\n", ushrt_max_def); |
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280 | printf (" SHRT_MAX %s\n", shrt_max_def); |
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281 | printf ("\n"); |
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282 | |
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283 | #ifdef _CRAY |
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284 | printf ("_CRAY is defined, so limits.h is being used\n"); |
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285 | #endif |
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286 | |
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287 | printf ("ULONG_MAX %lX\n", ULONG_MAX); |
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288 | printf ("ULONG_HIGHBIT %lX\n", ULONG_HIGHBIT); |
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289 | printf ("LONG_MAX %lX\n", LONG_MAX); |
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290 | printf ("LONG_MIN %lX\n", LONG_MIN); |
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291 | |
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292 | printf ("UINT_MAX %X\n", UINT_MAX); |
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293 | printf ("UINT_HIGHBIT %X\n", UINT_HIGHBIT); |
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294 | printf ("INT_MAX %X\n", INT_MAX); |
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295 | printf ("INT_MIN %X\n", INT_MIN); |
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296 | |
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297 | printf ("USHRT_MAX %hX\n", USHRT_MAX); |
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298 | printf ("USHRT_HIGHBIT %hX\n", USHRT_HIGHBIT); |
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299 | printf ("SHRT_MAX %hX\n", SHRT_MAX); |
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300 | printf ("SHRT_MIN %hX\n", SHRT_MIN); |
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301 | |
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302 | printf ("\n"); |
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303 | printf ("Bits\n"); |
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304 | CALC_BITS (bits, long); printf (" long %d\n", bits); |
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305 | CALC_BITS (bits, int); printf (" int %d\n", bits); |
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306 | CALC_BITS (bits, short); printf (" short %d\n", bits); |
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307 | CALC_BITS (bits, unsigned long); printf (" unsigned long %d\n", bits); |
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308 | CALC_BITS (bits, unsigned int); printf (" unsigned int %d\n", bits); |
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309 | CALC_BITS (bits, unsigned short); printf (" unsigned short %d\n", bits); |
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310 | CALC_BITS (bits, mp_size_t); printf (" mp_size_t %d\n", bits); |
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311 | } |
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312 | |
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313 | if (error) |
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314 | abort (); |
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315 | |
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316 | exit (0); |
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317 | } |
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