1 | /**CFile*********************************************************************** |
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2 | |
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3 | FileName [imgTfmCache.c] |
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4 | |
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5 | PackageName [img] |
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6 | |
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7 | Synopsis [Routines for image cache in transition function method.] |
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8 | |
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9 | SeeAlso [imgTfm.c imgTfmFwd.c imgTfmBwd.c imgTfmUtil.c] |
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10 | |
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11 | Author [In-Ho Moon] |
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12 | |
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13 | Copyright [Copyright (c) 1994-1996 The Regents of the Univ. of Colorado. |
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14 | All rights reserved. |
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15 | |
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16 | Permission is hereby granted, without written agreement and without license |
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17 | or royalty fees, to use, copy, modify, and distribute this software and its |
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18 | documentation for any purpose, provided that the above copyright notice and |
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19 | the following two paragraphs appear in all copies of this software. |
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20 | |
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21 | IN NO EVENT SHALL THE UNIVERSITY OF COLORADO BE LIABLE TO ANY PARTY FOR |
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22 | DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
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23 | OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF |
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24 | COLORADO HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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25 | |
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26 | THE UNIVERSITY OF COLORADO SPECIFICALLY DISCLAIMS ANY WARRANTIES, |
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27 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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28 | FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN |
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29 | "AS IS" BASIS, AND THE UNIVERSITY OF COLORADO HAS NO OBLIGATION TO PROVIDE |
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30 | MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.] |
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31 | |
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32 | ******************************************************************************/ |
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33 | #include "imgInt.h" |
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34 | |
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35 | static char rcsid[] UNUSED = "$Id: imgTfmCache.c,v 1.8 2005/04/23 14:30:54 jinh Exp $"; |
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36 | |
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37 | /*---------------------------------------------------------------------------*/ |
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38 | /* Constant declarations */ |
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39 | /*---------------------------------------------------------------------------*/ |
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40 | |
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41 | /*---------------------------------------------------------------------------*/ |
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42 | /* Type declarations */ |
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43 | /*---------------------------------------------------------------------------*/ |
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44 | |
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45 | /*---------------------------------------------------------------------------*/ |
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46 | /* Structure declarations */ |
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47 | /*---------------------------------------------------------------------------*/ |
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48 | |
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49 | /*---------------------------------------------------------------------------*/ |
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50 | /* Variable declarations */ |
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51 | /*---------------------------------------------------------------------------*/ |
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52 | |
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53 | static int ComplementFlag; /* If set, returns the negation of the |
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54 | result from cache */ |
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55 | static array_t *SubstituteVector; /* returns the result from cache by |
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56 | substituting the variables */ |
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57 | static ImgCacheTable_t *ImgGlobalCache; /* global image cache */ |
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58 | static ImgCacheTable_t *PreGlobalCache; /* global preimage cache */ |
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59 | static int ImgGlobalCacheRef; /* the number of image-info |
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60 | refering to the image cache */ |
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61 | static int PreGlobalCacheRef; /* the number of image-info |
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62 | refering to the preimage cache */ |
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63 | |
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64 | /*---------------------------------------------------------------------------*/ |
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65 | /* Macro declarations */ |
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66 | /*---------------------------------------------------------------------------*/ |
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67 | |
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68 | |
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69 | /**AutomaticStart*************************************************************/ |
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70 | |
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71 | /*---------------------------------------------------------------------------*/ |
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72 | /* Static function prototypes */ |
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73 | /*---------------------------------------------------------------------------*/ |
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74 | |
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75 | static void CacheDestroyEntry(ImgCacheEntry_t *entry, boolean freeEntry); |
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76 | static int VectorHash(ImgCacheTable_t *table, array_t *delta, bdd_t *constraint); |
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77 | static int VectorStHash(char *key, int modulus); |
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78 | static int KeyStHash(char *key, int modulus); |
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79 | static int VectorCompare(array_t *vector1, array_t *vector2); |
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80 | static int VectorSortCompare(array_t *vector1, array_t *vector2); |
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81 | static int VectorSortCompareWithConstraint(array_t *vector1, array_t *vector2); |
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82 | static int ImageKeyCompare(ImgCacheStKey_t *key1, ImgCacheStKey_t *key2); |
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83 | static int ImageKeySortCompare(ImgCacheStKey_t *key1, ImgCacheStKey_t *key2); |
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84 | static int PreImageKeyCompare(ImgCacheStKey_t *key1, ImgCacheStKey_t *key2); |
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85 | static mdd_t * SubstituteCacheResult(ImgTfmInfo_t *info, array_t *keyVector, array_t *cacheVector, mdd_t *result); |
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86 | static mdd_t * SubstituteCacheResultRecur(mdd_t *result, array_t *varArray, array_t *funcArray, int pos); |
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87 | |
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88 | /**AutomaticEnd***************************************************************/ |
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89 | |
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90 | |
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91 | /*---------------------------------------------------------------------------*/ |
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92 | /* Definition of exported functions */ |
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93 | /*---------------------------------------------------------------------------*/ |
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94 | |
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95 | |
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96 | /**Function******************************************************************** |
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97 | |
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98 | Synopsis [Gets the statistics of image cache of transition function |
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99 | method.] |
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100 | |
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101 | Description [Gets the statistics of image cache of transition function |
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102 | method] |
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103 | |
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104 | SideEffects [] |
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105 | |
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106 | SeeAlso [] |
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107 | |
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108 | ******************************************************************************/ |
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109 | int |
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110 | Img_TfmGetCacheStatistics(Img_ImageInfo_t *imageInfo, int preFlag, |
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111 | double *inserts, double *lookups, double *hits, |
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112 | double *entries, int *nSlots, int *maxChainLength) |
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113 | { |
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114 | ImgTfmInfo_t *info; |
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115 | ImgCacheTable_t *cache; |
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116 | |
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117 | if (imageInfo) { |
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118 | if (imageInfo->methodType != Img_Tfm_c && |
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119 | imageInfo->methodType != Img_Hybrid_c) { |
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120 | return(0); |
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121 | } |
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122 | |
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123 | info = (ImgTfmInfo_t *)imageInfo->methodData; |
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124 | if (!info->option->useCache) |
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125 | return(0); |
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126 | |
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127 | if (preFlag) |
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128 | cache = info->preCache; |
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129 | else |
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130 | cache = info->imgCache; |
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131 | if (!cache) |
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132 | return(0); |
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133 | } else { |
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134 | if (preFlag) |
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135 | cache = PreGlobalCache; |
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136 | else |
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137 | cache = ImgGlobalCache; |
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138 | if (!cache) |
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139 | return(0); |
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140 | } |
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141 | |
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142 | *inserts = cache->inserts; |
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143 | *lookups = cache->lookups; |
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144 | *hits = cache->hits; |
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145 | *entries = cache->entries; |
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146 | if (cache->stTable) { |
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147 | *nSlots = 0; |
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148 | *maxChainLength = 0; |
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149 | } else { |
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150 | *nSlots = cache->nSlots; |
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151 | *maxChainLength = cache->maxChainLength; |
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152 | } |
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153 | return(1); |
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154 | } |
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155 | |
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156 | |
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157 | /**Function******************************************************************** |
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158 | |
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159 | Synopsis [Checks whether a global cache is used for transition function |
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160 | method.] |
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161 | |
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162 | Description [Checks whether a global cache is used for transition function |
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163 | method. If it is, returns 1, otherwise returns 0. |
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164 | A global cache can be used when all image-info structs store the results |
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165 | into one image cache. A local cache is used for each image-info struct stores |
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166 | its results into its own image cache.] |
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167 | |
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168 | SideEffects [] |
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169 | |
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170 | SeeAlso [] |
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171 | |
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172 | ******************************************************************************/ |
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173 | int |
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174 | Img_TfmCheckGlobalCache(int preFlag) |
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175 | { |
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176 | if (preFlag) { |
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177 | if (PreGlobalCache) |
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178 | return(1); |
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179 | else |
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180 | return(0); |
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181 | } else { |
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182 | if (ImgGlobalCache) |
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183 | return(1); |
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184 | else |
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185 | return(0); |
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186 | } |
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187 | } |
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188 | |
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189 | |
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190 | /**Function******************************************************************** |
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191 | |
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192 | Synopsis [Prints the statistics of image cache of transition function |
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193 | method.] |
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194 | |
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195 | Description [Prints the statistics of image cache of transition function |
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196 | method.] |
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197 | |
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198 | SideEffects [] |
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199 | |
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200 | SeeAlso [] |
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201 | |
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202 | ******************************************************************************/ |
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203 | void |
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204 | Img_TfmPrintCacheStatistics(Img_ImageInfo_t *imageInfo, int preFlag) |
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205 | { |
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206 | ImgTfmInfo_t *info; |
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207 | ImgCacheTable_t *cache; |
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208 | |
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209 | if (imageInfo) { |
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210 | if (imageInfo->methodType != Img_Tfm_c && |
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211 | imageInfo->methodType != Img_Hybrid_c) { |
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212 | return; |
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213 | } |
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214 | |
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215 | info = (ImgTfmInfo_t *)imageInfo->methodData; |
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216 | if (!info->option->useCache) |
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217 | return; |
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218 | |
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219 | if (preFlag) |
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220 | cache = info->preCache; |
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221 | else |
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222 | cache = info->imgCache; |
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223 | if (!cache) |
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224 | return; |
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225 | } else { |
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226 | if (preFlag) |
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227 | cache = PreGlobalCache; |
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228 | else |
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229 | cache = ImgGlobalCache; |
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230 | if (!cache) |
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231 | return; |
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232 | } |
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233 | ImgPrintCacheStatistics(cache); |
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234 | } |
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235 | |
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236 | |
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237 | /**Function******************************************************************** |
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238 | |
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239 | Synopsis [Frees all cache contents of image computation using transition |
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240 | function method.] |
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241 | |
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242 | Description [Frees all cache contents of image computation using transition |
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243 | function method. This function is to free the cache contents only when |
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244 | requested and when tfm_auto_flush_cache is off.] |
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245 | |
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246 | SideEffects [] |
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247 | |
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248 | SeeAlso [] |
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249 | |
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250 | ******************************************************************************/ |
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251 | void |
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252 | Img_TfmFlushCache(Img_ImageInfo_t *imageInfo, int preFlag) |
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253 | { |
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254 | ImgTfmInfo_t *info; |
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255 | |
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256 | if (imageInfo) { |
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257 | if (imageInfo->methodType != Img_Tfm_c && |
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258 | imageInfo->methodType != Img_Hybrid_c) { |
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259 | return; |
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260 | } |
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261 | |
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262 | info = (ImgTfmInfo_t *)imageInfo->methodData; |
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263 | |
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264 | if (info->option->autoFlushCache == 0) { |
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265 | if (preFlag) |
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266 | ImgFlushCache(info->preCache); |
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267 | else |
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268 | ImgFlushCache(info->imgCache); |
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269 | } |
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270 | } |
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271 | } |
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272 | |
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273 | |
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274 | /*---------------------------------------------------------------------------*/ |
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275 | /* Definition of internal functions */ |
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276 | /*---------------------------------------------------------------------------*/ |
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277 | |
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278 | |
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279 | /**Function******************************************************************** |
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280 | |
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281 | Synopsis [Initializes a cache table.] |
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282 | |
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283 | Description [Initializes a cache table.] |
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284 | |
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285 | SideEffects [] |
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286 | |
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287 | ******************************************************************************/ |
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288 | void |
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289 | ImgCacheInitTable(ImgTfmInfo_t *info, int num_slot, int globalCache, |
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290 | boolean preImgFlag) |
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291 | { |
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292 | ImgCacheTable_t *table; |
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293 | ImgTfmOption_t *option = info->option; |
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294 | |
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295 | if (globalCache) { |
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296 | if (preImgFlag && PreGlobalCache) { |
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297 | info->preCache = PreGlobalCache; |
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298 | PreGlobalCacheRef++; |
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299 | return; |
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300 | } else if (!preImgFlag && ImgGlobalCache) { |
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301 | info->imgCache = ImgGlobalCache; |
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302 | ImgGlobalCacheRef++; |
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303 | return; |
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304 | } |
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305 | } |
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306 | |
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307 | table = ALLOC(ImgCacheTable_t, 1); |
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308 | memset(table, 0, sizeof(ImgCacheTable_t)); |
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309 | table->nSlots = num_slot; |
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310 | if (option->useCache == 2) { |
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311 | if (preImgFlag) |
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312 | table->stTable = st_init_table((ST_PFICPCP)PreImageKeyCompare, |
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313 | KeyStHash); |
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314 | else if (info->useConstraint && option->sortVectorFlag) |
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315 | table->stTable = st_init_table((ST_PFICPCP)ImageKeySortCompare, |
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316 | KeyStHash); |
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317 | else if (info->useConstraint) |
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318 | table->stTable = st_init_table((ST_PFICPCP)ImageKeyCompare, |
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319 | KeyStHash); |
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320 | else if (option->sortVectorFlag) |
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321 | table->stTable = st_init_table((ST_PFICPCP)VectorSortCompare, |
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322 | VectorStHash); |
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323 | else |
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324 | table->stTable = st_init_table((ST_PFICPCP)VectorCompare, |
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325 | VectorStHash); |
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326 | } else { |
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327 | table->slot = ALLOC(ImgCacheEntry_t *, num_slot); |
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328 | memset(table->slot, 0, sizeof(ImgCacheEntry_t *) * num_slot); |
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329 | } |
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330 | table->maxChainLength = option->maxChainLength; |
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331 | table->preImgFlag = preImgFlag; |
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332 | table->useConstraint = info->useConstraint; |
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333 | if (preImgFlag) { |
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334 | table->compareFunc = VectorCompare; |
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335 | info->preCache = table; |
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336 | } else { |
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337 | if (option->sortVectorFlag) { |
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338 | if (info->useConstraint) |
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339 | table->compareFunc = VectorSortCompareWithConstraint; |
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340 | else |
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341 | table->compareFunc = VectorSortCompare; |
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342 | } else |
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343 | table->compareFunc = VectorCompare; |
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344 | info->imgCache = table; |
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345 | } |
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346 | |
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347 | if (globalCache) { |
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348 | if (preImgFlag) { |
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349 | PreGlobalCache = table; |
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350 | PreGlobalCacheRef = 1; |
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351 | } else { |
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352 | ImgGlobalCache = table; |
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353 | ImgGlobalCacheRef = 1; |
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354 | } |
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355 | } |
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356 | } |
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357 | |
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358 | |
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359 | /**Function******************************************************************** |
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360 | |
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361 | Synopsis [Destroys a cache table.] |
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362 | |
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363 | Description [Destroys a cache table.] |
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364 | |
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365 | SideEffects [] |
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366 | |
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367 | ******************************************************************************/ |
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368 | void |
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369 | ImgCacheDestroyTable(ImgCacheTable_t *table, int globalCache) |
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370 | { |
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371 | unsigned int i; |
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372 | ImgCacheEntry_t *entry, *next; |
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373 | array_t *vector; |
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374 | bdd_t *result; |
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375 | st_generator *stGen; |
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376 | ImgCacheStKey_t *key; |
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377 | |
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378 | if (globalCache) { |
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379 | if (table->preImgFlag) { |
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380 | PreGlobalCacheRef--; |
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381 | if (PreGlobalCacheRef > 0) |
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382 | return; |
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383 | } else { |
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384 | ImgGlobalCacheRef--; |
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385 | if (ImgGlobalCacheRef > 0) |
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386 | return; |
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387 | } |
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388 | } |
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389 | |
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390 | if (table->stTable) { |
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391 | if (table->preImgFlag || table->useConstraint) { |
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392 | st_foreach_item(table->stTable, stGen, &key, &result) { |
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393 | ImgVectorFree(key->vector); |
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394 | if (key->constraint) |
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395 | mdd_free(key->constraint); |
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396 | FREE(key); |
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397 | mdd_free(result); |
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398 | } |
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399 | } else { |
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400 | st_foreach_item(table->stTable, stGen, &vector, &result) { |
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401 | ImgVectorFree(vector); |
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402 | mdd_free(result); |
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403 | } |
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404 | } |
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405 | st_free_table(table->stTable); |
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406 | } else { |
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407 | for (i = 0; i < table->nSlots; i++) { |
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408 | entry = table->slot[i]; |
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409 | while (entry != NIL(ImgCacheEntry_t)) { |
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410 | next = entry->next; |
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411 | CacheDestroyEntry(entry, TRUE); |
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412 | entry = next; |
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413 | } |
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414 | } |
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415 | FREE(table->slot); |
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416 | } |
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417 | |
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418 | if (globalCache) { |
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419 | if (table->preImgFlag) |
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420 | PreGlobalCache = NIL(ImgCacheTable_t); |
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421 | else |
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422 | ImgGlobalCache = NIL(ImgCacheTable_t); |
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423 | } |
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424 | |
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425 | FREE(table); |
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426 | } |
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427 | |
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428 | |
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429 | /**Function******************************************************************** |
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430 | |
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431 | Synopsis [Lookups cache table.] |
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432 | |
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433 | Description [Lookups cache table.] |
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434 | |
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435 | SideEffects [] |
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436 | |
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437 | ******************************************************************************/ |
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438 | bdd_t * |
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439 | ImgCacheLookupTable(ImgTfmInfo_t *info, ImgCacheTable_t *table, array_t *delta, |
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440 | bdd_t *constraint) |
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441 | { |
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442 | int slot; |
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443 | ImgCacheEntry_t *entry; |
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444 | bdd_t *result, *newResult; |
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445 | int *ptr1, *ptr2; |
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446 | ImgCacheStKey_t key; |
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447 | |
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448 | table->lookups += 1.0; |
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449 | |
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450 | /* lossless cache */ |
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451 | if (table->stTable) { |
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452 | if (table->preImgFlag) { |
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453 | key.vector = delta; |
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454 | key.constraint = constraint; |
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455 | if (st_lookup(table->stTable, (char *)&key, &result)) { |
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456 | table->hits += 1.0; |
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457 | if (ComplementFlag) |
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458 | return(mdd_not(result)); |
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459 | else |
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460 | return(mdd_dup(result)); |
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461 | } |
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462 | } else if (table->useConstraint) { |
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463 | key.vector = delta; |
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464 | key.constraint = constraint; |
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465 | if (st_lookup(table->stTable, (char *)&key, &result)) { |
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466 | table->hits += 1.0; |
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467 | if (SubstituteVector) { |
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468 | newResult = SubstituteCacheResult(info, delta, SubstituteVector, |
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469 | result); |
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470 | return(newResult); |
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471 | } else |
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472 | return(mdd_dup(result)); |
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473 | } |
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474 | } else { |
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475 | if (st_lookup(table->stTable, (char *)delta, &result)) { |
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476 | table->hits += 1.0; |
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477 | if (SubstituteVector) { |
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478 | newResult = SubstituteCacheResult(info, delta, SubstituteVector, |
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479 | result); |
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480 | return(newResult); |
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481 | } |
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482 | return(mdd_dup(result)); |
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483 | } |
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484 | } |
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485 | |
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486 | return(NIL(bdd_t)); |
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487 | } |
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488 | |
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489 | slot = VectorHash(table, delta, constraint); |
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490 | |
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491 | entry = table->slot[slot]; |
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492 | while (entry != NIL(ImgCacheEntry_t)) { |
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493 | if ((*table->compareFunc)(delta, entry->vector) == 0) { |
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494 | table->hits++; |
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495 | if (table->preImgFlag) { /* preimage computation */ |
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496 | ptr1 = (int *)bdd_pointer(constraint); |
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497 | ptr2 = (int *)bdd_pointer(entry->constraint); |
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498 | if (((unsigned long)ptr1 ^ (unsigned long)ptr2) <= 01) { |
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499 | table->hits++; |
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500 | if (mdd_equal(constraint, entry->constraint)) |
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501 | return(mdd_dup(entry->result)); |
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502 | else |
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503 | return(mdd_not(entry->result)); |
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504 | } |
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505 | } else if (constraint) { /* image computation */ |
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506 | if (mdd_equal(constraint, entry->constraint)) { |
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507 | if (SubstituteVector) { |
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508 | newResult = SubstituteCacheResult(info, delta, SubstituteVector, |
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509 | entry->result); |
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510 | return(newResult); |
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511 | } |
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512 | return(mdd_dup(entry->result)); |
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513 | } |
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514 | } else if (SubstituteVector) { /* range computation */ |
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515 | newResult = SubstituteCacheResult(info, delta, SubstituteVector, |
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516 | entry->result); |
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517 | return(newResult); |
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518 | } else { |
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519 | return(mdd_dup(entry->result)); |
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520 | } |
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521 | } |
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522 | entry = entry->next; |
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523 | } |
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524 | return(NIL(bdd_t)); |
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525 | } |
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526 | |
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527 | |
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528 | /**Function******************************************************************** |
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529 | |
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530 | Synopsis [Inserts an entry into cache table.] |
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531 | |
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532 | Description [Inserts an entry into cache table.] |
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533 | |
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534 | SideEffects [] |
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535 | |
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536 | ******************************************************************************/ |
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537 | void |
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538 | ImgCacheInsertTable(ImgCacheTable_t *table, array_t *delta, |
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539 | bdd_t *constraint, bdd_t *result) |
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540 | { |
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541 | int slot, num, minSize; |
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542 | ImgCacheEntry_t *entry, *new_, *pos, *minDeltaEntry; |
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543 | |
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544 | table->inserts += 1.0; |
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545 | |
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546 | if (table->stTable) { |
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547 | table->entries += 1.0; |
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548 | if (table->preImgFlag || table->useConstraint) { |
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549 | ImgCacheStKey_t *key; |
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550 | |
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551 | key = ALLOC(ImgCacheStKey_t, 1); |
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552 | key->vector = delta; |
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553 | key->constraint = constraint; |
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554 | st_insert(table->stTable, (char *)key, (char *)result); |
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555 | } else |
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556 | st_insert(table->stTable, (char *)delta, (char *)result); |
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557 | return; |
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558 | } |
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559 | |
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560 | slot = VectorHash(table, delta, constraint); |
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561 | |
---|
562 | minSize = 0x7fffffff; |
---|
563 | num = 0; |
---|
564 | pos = table->slot[slot]; |
---|
565 | entry = minDeltaEntry = NIL(ImgCacheEntry_t); |
---|
566 | while (pos != NIL(ImgCacheEntry_t)) { |
---|
567 | if (array_n(pos->vector) < minSize) { |
---|
568 | minDeltaEntry = pos; |
---|
569 | minSize = array_n(pos->vector); |
---|
570 | } |
---|
571 | pos = pos->next; |
---|
572 | num++; |
---|
573 | } |
---|
574 | |
---|
575 | /* num = the number entries in the slot */ |
---|
576 | if (num < table->maxChainLength) { |
---|
577 | new_ = ALLOC(ImgCacheEntry_t, 1); |
---|
578 | new_->vector = delta; |
---|
579 | new_->constraint = constraint; |
---|
580 | new_->result = result; |
---|
581 | new_->next = table->slot[slot]; |
---|
582 | table->slot[slot] = new_; |
---|
583 | table->entries += 1.0; |
---|
584 | } else if (entry != NIL(ImgCacheEntry_t)) { |
---|
585 | CacheDestroyEntry(entry, FALSE); |
---|
586 | entry->vector = delta; |
---|
587 | entry->constraint = constraint; |
---|
588 | entry->result = result; |
---|
589 | } else { /* all entries are full of latest entries */ |
---|
590 | if (0) { /* Rehash */ |
---|
591 | unsigned int i, new_num_slot, new_slot, old_num_slot; |
---|
592 | ImgCacheEntry_t *next; |
---|
593 | ImgCacheEntry_t **old_bin; |
---|
594 | |
---|
595 | old_num_slot = table->nSlots; |
---|
596 | old_bin = table->slot; |
---|
597 | new_num_slot = old_num_slot * 2; |
---|
598 | table->slot = ALLOC(ImgCacheEntry_t *, new_num_slot); |
---|
599 | if (!table->slot) { |
---|
600 | printf("VI_insert_table:new_slots"); |
---|
601 | exit(-1); |
---|
602 | } |
---|
603 | memset(table->slot, 0, sizeof(ImgCacheEntry_t *) * new_num_slot); |
---|
604 | table->nSlots = new_num_slot; |
---|
605 | |
---|
606 | for (i = 0; i < old_num_slot; i++) { |
---|
607 | pos = old_bin[i]; |
---|
608 | while (pos != NIL(ImgCacheEntry_t)) { |
---|
609 | next = pos->next; |
---|
610 | new_slot = VectorHash(table, pos->vector, pos->constraint); |
---|
611 | pos->next = table->slot[new_slot]; |
---|
612 | table->slot[new_slot] = pos; |
---|
613 | pos = next; |
---|
614 | } |
---|
615 | } |
---|
616 | |
---|
617 | new_slot = VectorHash(table, delta, constraint); |
---|
618 | new_ = ALLOC(ImgCacheEntry_t, 1); |
---|
619 | new_->vector = delta; |
---|
620 | new_->constraint = constraint; |
---|
621 | new_->result = result; |
---|
622 | new_->next = table->slot[slot]; |
---|
623 | table->slot[slot] = new_; |
---|
624 | table->entries += 1.0; |
---|
625 | } else { |
---|
626 | CacheDestroyEntry(minDeltaEntry, FALSE); |
---|
627 | minDeltaEntry->vector = delta; |
---|
628 | minDeltaEntry->constraint = constraint; |
---|
629 | minDeltaEntry->result = result; |
---|
630 | } |
---|
631 | } |
---|
632 | } |
---|
633 | |
---|
634 | |
---|
635 | /**Function******************************************************************** |
---|
636 | |
---|
637 | Synopsis [Flushes all cache entries.] |
---|
638 | |
---|
639 | Description [Flushes all cache entries.] |
---|
640 | |
---|
641 | SideEffects [] |
---|
642 | |
---|
643 | ******************************************************************************/ |
---|
644 | void |
---|
645 | ImgFlushCache(ImgCacheTable_t *table) |
---|
646 | { |
---|
647 | unsigned int i; |
---|
648 | ImgCacheEntry_t *entry, *next; |
---|
649 | array_t *vector; |
---|
650 | bdd_t *result; |
---|
651 | st_generator *stGen; |
---|
652 | ImgCacheStKey_t *key; |
---|
653 | |
---|
654 | if (!table) |
---|
655 | return; |
---|
656 | |
---|
657 | if (table->stTable) { |
---|
658 | if (table->preImgFlag || table->useConstraint) { |
---|
659 | st_foreach_item(table->stTable, stGen, &key, &result) { |
---|
660 | st_delete(table->stTable, &key, NIL(char *)); |
---|
661 | ImgVectorFree(key->vector); |
---|
662 | mdd_free(key->constraint); |
---|
663 | FREE(key); |
---|
664 | mdd_free(result); |
---|
665 | } |
---|
666 | } else { |
---|
667 | st_foreach_item(table->stTable, stGen, &vector, &result) { |
---|
668 | st_delete(table->stTable, &vector, NIL(char *)); |
---|
669 | ImgVectorFree(vector); |
---|
670 | mdd_free(result); |
---|
671 | } |
---|
672 | } |
---|
673 | } else { |
---|
674 | for (i = 0; i < table->nSlots; i++) { |
---|
675 | entry = table->slot[i]; |
---|
676 | while (entry != NIL(ImgCacheEntry_t)) { |
---|
677 | next = entry->next; |
---|
678 | CacheDestroyEntry(entry, TRUE); |
---|
679 | entry = next; |
---|
680 | } |
---|
681 | table->slot[i] = NIL(ImgCacheEntry_t); |
---|
682 | } |
---|
683 | } |
---|
684 | table->entries = 0.0; |
---|
685 | } |
---|
686 | |
---|
687 | |
---|
688 | /**Function******************************************************************** |
---|
689 | |
---|
690 | Synopsis [Prints cache statistics for transition function method.] |
---|
691 | |
---|
692 | Description [Prints cache statistics for transition function method.] |
---|
693 | |
---|
694 | SideEffects [] |
---|
695 | |
---|
696 | SeeAlso [] |
---|
697 | |
---|
698 | ******************************************************************************/ |
---|
699 | void |
---|
700 | ImgPrintCacheStatistics(ImgCacheTable_t *cache) |
---|
701 | { |
---|
702 | if (cache->preImgFlag) |
---|
703 | fprintf(vis_stdout, "** cache statistics (preImg) **\n"); |
---|
704 | else |
---|
705 | fprintf(vis_stdout, "** cache statistics (img) **\n"); |
---|
706 | fprintf(vis_stdout, "# insertions = %g\n", cache->inserts); |
---|
707 | if (cache->inserts != 0.0) { |
---|
708 | fprintf(vis_stdout, "# lookups = %g\n", cache->lookups); |
---|
709 | fprintf(vis_stdout, "# hits = %g (%.2f%%)\n", cache->hits, |
---|
710 | cache->hits / cache->lookups * 100.0); |
---|
711 | fprintf(vis_stdout, "# misses = %g (%.2f%%)\n", |
---|
712 | cache->lookups - cache->hits, |
---|
713 | (cache->lookups - cache->hits) / cache->lookups * 100.0); |
---|
714 | fprintf(vis_stdout, "# entries = %g\n", cache->entries); |
---|
715 | if (!cache->stTable) { |
---|
716 | fprintf(vis_stdout, "# slots = %d\n", cache->nSlots); |
---|
717 | fprintf(vis_stdout, "maxChainLength = %d\n", cache->maxChainLength); |
---|
718 | } |
---|
719 | } |
---|
720 | } |
---|
721 | |
---|
722 | |
---|
723 | /*---------------------------------------------------------------------------*/ |
---|
724 | /* Definition of static functions */ |
---|
725 | /*---------------------------------------------------------------------------*/ |
---|
726 | |
---|
727 | |
---|
728 | /**Function******************************************************************** |
---|
729 | |
---|
730 | Synopsis [Destroys a cache entry.] |
---|
731 | |
---|
732 | Description [Destroys a cache entry.] |
---|
733 | |
---|
734 | SideEffects [] |
---|
735 | |
---|
736 | ******************************************************************************/ |
---|
737 | static void |
---|
738 | CacheDestroyEntry(ImgCacheEntry_t *entry, boolean freeEntry) |
---|
739 | { |
---|
740 | ImgVectorFree(entry->vector); |
---|
741 | mdd_free(entry->result); |
---|
742 | if (entry->constraint) |
---|
743 | mdd_free(entry->constraint); |
---|
744 | if (freeEntry) |
---|
745 | FREE(entry); |
---|
746 | } |
---|
747 | |
---|
748 | |
---|
749 | /**Function******************************************************************** |
---|
750 | |
---|
751 | Synopsis [Returns hash value of a vector.] |
---|
752 | |
---|
753 | Description [Returns hash value of a vector.] |
---|
754 | |
---|
755 | SideEffects [] |
---|
756 | |
---|
757 | ******************************************************************************/ |
---|
758 | static int |
---|
759 | VectorHash(ImgCacheTable_t *table, array_t *delta, bdd_t *constraint) |
---|
760 | { |
---|
761 | unsigned long value; |
---|
762 | ImgComponent_t *comp; |
---|
763 | bdd_t *func; |
---|
764 | int i; |
---|
765 | |
---|
766 | value = array_n(delta); |
---|
767 | if (constraint) |
---|
768 | value += (unsigned long)bdd_pointer(constraint) & ~01; |
---|
769 | for (i = 0; i < array_n(delta); i++) { |
---|
770 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
771 | func = comp->func; |
---|
772 | value += (unsigned long)bdd_pointer(func) & ~01; |
---|
773 | } |
---|
774 | return((int)(value % table->nSlots)); |
---|
775 | } |
---|
776 | |
---|
777 | |
---|
778 | /**Function******************************************************************** |
---|
779 | |
---|
780 | Synopsis [Returns hash value of a vector for st_table.] |
---|
781 | |
---|
782 | Description [Returns hash value of a vector for st_table.] |
---|
783 | |
---|
784 | SideEffects [] |
---|
785 | |
---|
786 | ******************************************************************************/ |
---|
787 | static int |
---|
788 | VectorStHash(char *key, int modulus) |
---|
789 | { |
---|
790 | unsigned long value; |
---|
791 | array_t *delta; |
---|
792 | ImgComponent_t *comp; |
---|
793 | bdd_t *func; |
---|
794 | int i; |
---|
795 | |
---|
796 | delta = (array_t *)key; |
---|
797 | value = array_n(delta); |
---|
798 | |
---|
799 | for (i = 0; i < array_n(delta); i++) { |
---|
800 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
801 | func = comp->func; |
---|
802 | value += (unsigned long)bdd_pointer(func) & ~01; |
---|
803 | } |
---|
804 | return((int)(value % modulus)); |
---|
805 | } |
---|
806 | |
---|
807 | |
---|
808 | /**Function******************************************************************** |
---|
809 | |
---|
810 | Synopsis [Returns hash value of a key for st_table.] |
---|
811 | |
---|
812 | Description [Returns hash value of a key for st_table.] |
---|
813 | |
---|
814 | SideEffects [] |
---|
815 | |
---|
816 | ******************************************************************************/ |
---|
817 | static int |
---|
818 | KeyStHash(char *key, int modulus) |
---|
819 | { |
---|
820 | ImgCacheStKey_t *stKey; |
---|
821 | unsigned long value; |
---|
822 | array_t *delta; |
---|
823 | ImgComponent_t *comp; |
---|
824 | bdd_t *func; |
---|
825 | int i; |
---|
826 | |
---|
827 | stKey = (ImgCacheStKey_t *)key; |
---|
828 | delta = stKey->vector; |
---|
829 | value = array_n(delta); |
---|
830 | if (stKey->constraint) |
---|
831 | value += (unsigned long)bdd_pointer(stKey->constraint) & ~01; |
---|
832 | |
---|
833 | for (i = 0; i < array_n(delta); i++) { |
---|
834 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
835 | func = comp->func; |
---|
836 | value += (unsigned long)bdd_pointer(func) & ~01; |
---|
837 | } |
---|
838 | return((int)(value % modulus)); |
---|
839 | } |
---|
840 | |
---|
841 | |
---|
842 | /**Function******************************************************************** |
---|
843 | |
---|
844 | Synopsis [Compares two vectors.] |
---|
845 | |
---|
846 | Description [Compares two vectors.] |
---|
847 | |
---|
848 | SideEffects [] |
---|
849 | |
---|
850 | ******************************************************************************/ |
---|
851 | static int |
---|
852 | VectorCompare(array_t *vector1, array_t *vector2) |
---|
853 | { |
---|
854 | ImgComponent_t *comp1, *comp2; |
---|
855 | int i, index1, index2; |
---|
856 | |
---|
857 | if (array_n(vector1) != array_n(vector2)) |
---|
858 | return(1); |
---|
859 | |
---|
860 | for (i = 0; i < array_n(vector1); i++) { |
---|
861 | comp1 = array_fetch(ImgComponent_t *, vector1, i); |
---|
862 | comp2 = array_fetch(ImgComponent_t *, vector2, i); |
---|
863 | index1 = (int)bdd_top_var_id(comp1->var); |
---|
864 | index2 = (int)bdd_top_var_id(comp2->var); |
---|
865 | if (index1 != index2) |
---|
866 | return(1); |
---|
867 | if (!mdd_equal(comp1->func, comp2->func)) |
---|
868 | return(1); |
---|
869 | } |
---|
870 | SubstituteVector = NIL(array_t); |
---|
871 | return(0); |
---|
872 | } |
---|
873 | |
---|
874 | |
---|
875 | /**Function******************************************************************** |
---|
876 | |
---|
877 | Synopsis [Compares two vectors considering substitution.] |
---|
878 | |
---|
879 | Description [Compares two vectors considering substitution.] |
---|
880 | |
---|
881 | SideEffects [] |
---|
882 | |
---|
883 | ******************************************************************************/ |
---|
884 | static int |
---|
885 | VectorSortCompare(array_t *vector1, array_t *vector2) |
---|
886 | { |
---|
887 | ImgComponent_t *comp1, *comp2; |
---|
888 | int i, index1, index2; |
---|
889 | int *ptr1, *ptr2, *regularPtr1, *regularPtr2; |
---|
890 | |
---|
891 | if (array_n(vector1) != array_n(vector2)) |
---|
892 | return(1); |
---|
893 | |
---|
894 | SubstituteVector = NIL(array_t); |
---|
895 | for (i = 0; i < array_n(vector1); i++) { |
---|
896 | comp1 = array_fetch(ImgComponent_t *, vector1, i); |
---|
897 | comp2 = array_fetch(ImgComponent_t *, vector2, i); |
---|
898 | index1 = (int)bdd_top_var_id(comp1->var); |
---|
899 | index2 = (int)bdd_top_var_id(comp2->var); |
---|
900 | if (index1 != index2) |
---|
901 | SubstituteVector = vector2; |
---|
902 | ptr1 = (int *)bdd_pointer(comp1->func); |
---|
903 | ptr2 = (int *)bdd_pointer(comp2->func); |
---|
904 | regularPtr1 = (int *)((unsigned long)ptr1 & ~01); |
---|
905 | regularPtr2 = (int *)((unsigned long)ptr2 & ~01); |
---|
906 | if (regularPtr1 == regularPtr2) { |
---|
907 | if (ptr1 != ptr2) { |
---|
908 | if (comp1->intermediate || comp2->intermediate) |
---|
909 | return(1); |
---|
910 | SubstituteVector = vector2; |
---|
911 | } |
---|
912 | } else |
---|
913 | return(1); |
---|
914 | } |
---|
915 | return(0); |
---|
916 | } |
---|
917 | |
---|
918 | |
---|
919 | /**Function******************************************************************** |
---|
920 | |
---|
921 | Synopsis [Compares two vectors considering substitution.] |
---|
922 | |
---|
923 | Description [Compares two vectors considering substitution.] |
---|
924 | |
---|
925 | SideEffects [] |
---|
926 | |
---|
927 | ******************************************************************************/ |
---|
928 | static int |
---|
929 | VectorSortCompareWithConstraint(array_t *vector1, array_t *vector2) |
---|
930 | { |
---|
931 | ImgComponent_t *comp1, *comp2; |
---|
932 | int i, index1, index2; |
---|
933 | |
---|
934 | if (array_n(vector1) != array_n(vector2)) |
---|
935 | return(1); |
---|
936 | |
---|
937 | SubstituteVector = NIL(array_t); |
---|
938 | for (i = 0; i < array_n(vector1); i++) { |
---|
939 | comp1 = array_fetch(ImgComponent_t *, vector1, i); |
---|
940 | comp2 = array_fetch(ImgComponent_t *, vector2, i); |
---|
941 | index1 = (int)bdd_top_var_id(comp1->var); |
---|
942 | index2 = (int)bdd_top_var_id(comp2->var); |
---|
943 | if (index1 != index2) |
---|
944 | SubstituteVector = vector2; |
---|
945 | if (!mdd_equal(comp1->func, comp2->func)) |
---|
946 | return(1); |
---|
947 | } |
---|
948 | return(0); |
---|
949 | } |
---|
950 | |
---|
951 | |
---|
952 | /**Function******************************************************************** |
---|
953 | |
---|
954 | Synopsis [Compares two keys.] |
---|
955 | |
---|
956 | Description [Compares two keys.] |
---|
957 | |
---|
958 | SideEffects [] |
---|
959 | |
---|
960 | ******************************************************************************/ |
---|
961 | static int |
---|
962 | ImageKeyCompare(ImgCacheStKey_t *key1, ImgCacheStKey_t *key2) |
---|
963 | { |
---|
964 | ComplementFlag = 0; |
---|
965 | if (mdd_equal(key1->constraint, key2->constraint)) { |
---|
966 | if (VectorCompare(key1->vector, key2->vector)) |
---|
967 | return(1); |
---|
968 | } else |
---|
969 | return(1); |
---|
970 | return(0); |
---|
971 | } |
---|
972 | |
---|
973 | |
---|
974 | /**Function******************************************************************** |
---|
975 | |
---|
976 | Synopsis [Compares two keys considering substitution.] |
---|
977 | |
---|
978 | Description [Compares two keys considering substitution.] |
---|
979 | |
---|
980 | SideEffects [] |
---|
981 | |
---|
982 | ******************************************************************************/ |
---|
983 | static int |
---|
984 | ImageKeySortCompare(ImgCacheStKey_t *key1, ImgCacheStKey_t *key2) |
---|
985 | { |
---|
986 | ComplementFlag = 0; |
---|
987 | if (mdd_equal(key1->constraint, key2->constraint)) { |
---|
988 | if (VectorSortCompareWithConstraint(key1->vector, key2->vector)) |
---|
989 | return(1); |
---|
990 | } else |
---|
991 | return(1); |
---|
992 | return(0); |
---|
993 | } |
---|
994 | |
---|
995 | |
---|
996 | /**Function******************************************************************** |
---|
997 | |
---|
998 | Synopsis [Compares two keys for preimage.] |
---|
999 | |
---|
1000 | Description [Compares two keys for preimage.] |
---|
1001 | |
---|
1002 | SideEffects [] |
---|
1003 | |
---|
1004 | ******************************************************************************/ |
---|
1005 | static int |
---|
1006 | PreImageKeyCompare(ImgCacheStKey_t *key1, ImgCacheStKey_t *key2) |
---|
1007 | { |
---|
1008 | unsigned long ptr1, ptr2; |
---|
1009 | |
---|
1010 | ptr1 = (unsigned long)bdd_pointer(key1->constraint); |
---|
1011 | ptr2 = (unsigned long)bdd_pointer(key2->constraint); |
---|
1012 | if ((ComplementFlag = (int) (ptr1 ^ ptr2)) <= 01) { |
---|
1013 | if (VectorCompare(key1->vector, key2->vector)) |
---|
1014 | return(1); |
---|
1015 | } else |
---|
1016 | return(1); |
---|
1017 | return(0); |
---|
1018 | } |
---|
1019 | |
---|
1020 | |
---|
1021 | /**Function******************************************************************** |
---|
1022 | |
---|
1023 | Synopsis [Substitutes a cache result.] |
---|
1024 | |
---|
1025 | Description [Substitutes a cache result.] |
---|
1026 | |
---|
1027 | SideEffects [] |
---|
1028 | |
---|
1029 | ******************************************************************************/ |
---|
1030 | static mdd_t * |
---|
1031 | SubstituteCacheResult(ImgTfmInfo_t *info, array_t *keyVector, |
---|
1032 | array_t *cacheVector, |
---|
1033 | mdd_t *result) |
---|
1034 | { |
---|
1035 | mdd_t *newResult; |
---|
1036 | ImgComponent_t *comp1, *comp2; |
---|
1037 | int *ptr1, *ptr2; |
---|
1038 | int i, id1, id2; |
---|
1039 | mdd_t *var, *func; |
---|
1040 | array_t *varArray, *funcArray; |
---|
1041 | |
---|
1042 | varArray = array_alloc(mdd_t *, 0); |
---|
1043 | funcArray = array_alloc(mdd_t *, 0); |
---|
1044 | |
---|
1045 | for (i = 0; i < array_n(keyVector); i++) { |
---|
1046 | comp1 = array_fetch(ImgComponent_t *, keyVector, i); |
---|
1047 | comp2 = array_fetch(ImgComponent_t *, cacheVector, i); |
---|
1048 | ptr1 = (int *)bdd_pointer(comp1->func); |
---|
1049 | ptr2 = (int *)bdd_pointer(comp2->func); |
---|
1050 | id1 = (int)bdd_top_var_id(comp1->var); |
---|
1051 | id2 = (int)bdd_top_var_id(comp2->var); |
---|
1052 | if (id1 == id2) { |
---|
1053 | if (ptr1 != ptr2) { |
---|
1054 | array_insert_last(mdd_t *, varArray, comp2->var); |
---|
1055 | func = mdd_not(comp1->var); |
---|
1056 | array_insert_last(mdd_t *, funcArray, func); |
---|
1057 | } |
---|
1058 | } else { |
---|
1059 | if (ptr1 == ptr2) { |
---|
1060 | array_insert_last(mdd_t *, varArray, comp2->var); |
---|
1061 | func = mdd_dup(comp1->var); |
---|
1062 | array_insert_last(mdd_t *, funcArray, func); |
---|
1063 | } else { |
---|
1064 | array_insert_last(mdd_t *, varArray, comp2->var); |
---|
1065 | func = mdd_not(comp1->var); |
---|
1066 | array_insert_last(mdd_t *, funcArray, func); |
---|
1067 | } |
---|
1068 | } |
---|
1069 | } |
---|
1070 | if (array_n(varArray) == 1) { |
---|
1071 | var = array_fetch(mdd_t *, varArray, 0); |
---|
1072 | func = array_fetch(mdd_t *, funcArray, 0); |
---|
1073 | newResult = bdd_compose(result, var, func); |
---|
1074 | } else if (bdd_get_package_name() == CUDD) |
---|
1075 | newResult = bdd_vector_compose(result, varArray, funcArray); |
---|
1076 | else |
---|
1077 | newResult = SubstituteCacheResultRecur(result, varArray, funcArray, 0); |
---|
1078 | array_free(varArray); |
---|
1079 | mdd_array_free(funcArray); |
---|
1080 | return(newResult); |
---|
1081 | } |
---|
1082 | |
---|
1083 | |
---|
1084 | /**Function******************************************************************** |
---|
1085 | |
---|
1086 | Synopsis [Recursive procedure of SubstituteCacheResult.] |
---|
1087 | |
---|
1088 | Description [Recursive procedure of SubstituteCacheResult.] |
---|
1089 | |
---|
1090 | SideEffects [] |
---|
1091 | |
---|
1092 | ******************************************************************************/ |
---|
1093 | static mdd_t * |
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1094 | SubstituteCacheResultRecur(mdd_t *result, array_t *varArray, array_t *funcArray, |
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1095 | int pos) |
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1096 | { |
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1097 | mdd_t *var, *varNot, *func; |
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1098 | mdd_t *resultT, *resultE, *newResultT, *newResultE, *newResult; |
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1099 | |
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1100 | if (pos > array_n(varArray)) |
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1101 | return(mdd_dup(result)); |
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1102 | |
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1103 | var = array_fetch(mdd_t *, varArray, pos); |
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1104 | func = array_fetch(mdd_t *, funcArray, pos); |
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1105 | varNot = mdd_not(var); |
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1106 | resultT = bdd_cofactor(result, var); |
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1107 | resultE = bdd_cofactor(result, varNot); |
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1108 | mdd_free(varNot); |
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1109 | newResultT = SubstituteCacheResultRecur(resultT, varArray, funcArray, |
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1110 | pos + 1); |
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1111 | mdd_free(resultT); |
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1112 | newResultE = SubstituteCacheResultRecur(resultE, varArray, funcArray, |
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1113 | pos + 1); |
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1114 | mdd_free(resultE); |
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1115 | newResult = bdd_ite(func, newResultT, newResultE, 1, 1, 1); |
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1116 | mdd_free(newResultT); |
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1117 | mdd_free(newResultE); |
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1118 | return(newResult); |
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1119 | } |
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