1 | /**CFile*********************************************************************** |
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2 | |
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3 | FileName [baigNode.c] |
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4 | |
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5 | PackageName [baig] |
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6 | |
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7 | Synopsis [Routines to access node data structure of the And/Inverter |
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8 | graph.] |
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9 | |
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10 | Author [Mohammad Awedh, HoonSang Jin] |
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11 | |
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12 | Copyright [ This file was created at the University of Colorado at |
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13 | Boulder. The University of Colorado at Boulder makes no warranty |
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14 | about the suitability of this software for any purpose. It is |
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15 | presented on an AS IS basis.] |
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16 | |
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17 | |
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18 | ******************************************************************************/ |
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19 | |
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20 | #include "vm.h" |
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21 | #include "baig.h" |
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22 | #include "baigInt.h" |
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23 | |
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24 | static char rcsid[] UNUSED = "$Id: baigNode.c,v 1.33 2009/04/12 00:14:03 fabio Exp $"; |
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25 | |
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26 | /*---------------------------------------------------------------------------*/ |
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27 | /* Constant declarations */ |
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28 | /*---------------------------------------------------------------------------*/ |
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29 | |
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30 | /**AutomaticStart*************************************************************/ |
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31 | |
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32 | /*---------------------------------------------------------------------------*/ |
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33 | /* Static function prototypes */ |
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34 | /*---------------------------------------------------------------------------*/ |
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35 | |
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36 | static void connectOutput(bAig_Manager_t *manager, bAigEdge_t from, bAigEdge_t to, int inputIndex); |
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37 | static bAigEdge_t HashTableLookup(bAig_Manager_t *manager, bAigEdge_t node1, bAigEdge_t node2); |
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38 | static int HashTableAdd(bAig_Manager_t *manager, bAigEdge_t nodeIndexParent, bAigEdge_t nodeIndex1, bAigEdge_t nodeIndex2); |
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39 | static int HashTableDelete(bAig_Manager_t *manager, bAigEdge_t node); |
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40 | |
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41 | /**AutomaticEnd***************************************************************/ |
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42 | |
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43 | |
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44 | /*---------------------------------------------------------------------------*/ |
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45 | /* Definition of exported functions */ |
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46 | /*---------------------------------------------------------------------------*/ |
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47 | |
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48 | |
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49 | /**Function******************************************************************** |
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50 | |
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51 | Synopsis [Read Node's name.] |
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52 | |
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53 | Description [Read the name of a node given its index.] |
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54 | |
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55 | SideEffects [] |
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56 | |
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57 | SeeAlso [] |
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58 | |
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59 | ******************************************************************************/ |
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60 | nameType_t * |
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61 | bAig_NodeReadName( |
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62 | bAig_Manager_t *manager, |
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63 | bAigEdge_t node) |
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64 | { |
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65 | return manager->nameList[bAigNodeID(node)]; |
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66 | } |
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67 | |
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68 | /**Function******************************************************************** |
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69 | |
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70 | Synopsis [Set Node's name.] |
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71 | |
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72 | Description [Set the name of node in Symbol table and name List] |
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73 | |
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74 | SideEffects [] |
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75 | |
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76 | SeeAlso [] |
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77 | |
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78 | ******************************************************************************/ |
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79 | void |
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80 | bAig_NodeSetName( |
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81 | bAig_Manager_t *manager, |
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82 | bAigEdge_t node, |
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83 | nameType_t *name) |
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84 | { |
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85 | nameType_t *tmpName = manager->nameList[bAigNodeID(node)]; |
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86 | FREE(tmpName); |
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87 | st_insert(manager->SymbolTable, name, (char*) (long) node); |
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88 | manager->nameList[bAigNodeID(node)] = name; |
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89 | } |
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90 | |
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91 | /**Function******************************************************************** |
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92 | |
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93 | Synopsis [Returns the index of the right node.] |
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94 | |
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95 | Description [] |
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96 | |
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97 | SideEffects [] |
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98 | |
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99 | SeeAlso [] |
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100 | |
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101 | ******************************************************************************/ |
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102 | int |
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103 | bAig_NodeReadIndexOfRightChild( |
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104 | bAig_Manager_t *manager, |
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105 | bAigEdge_t nodeIndex) |
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106 | { |
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107 | return rightChild(nodeIndex); |
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108 | } |
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109 | |
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110 | /**Function******************************************************************** |
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111 | |
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112 | Synopsis [Returns the index of the left node.] |
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113 | |
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114 | Description [] |
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115 | |
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116 | SideEffects [] |
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117 | |
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118 | SeeAlso [] |
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119 | |
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120 | ******************************************************************************/ |
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121 | bAigEdge_t |
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122 | bAig_NodeReadIndexOfLeftChild( |
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123 | bAig_Manager_t *manager, |
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124 | bAigEdge_t nodeIndex) |
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125 | { |
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126 | return leftChild(nodeIndex); |
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127 | } |
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128 | |
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129 | /**Function******************************************************************** |
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130 | |
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131 | Synopsis [Get canonical node of given node.] |
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132 | |
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133 | Description [This function find node index that is functionally equivalent with given node index.] |
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134 | |
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135 | SideEffects [] |
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136 | |
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137 | SeeAlso [] |
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138 | |
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139 | ******************************************************************************/ |
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140 | bAigEdge_t |
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141 | bAig_GetCanonical( |
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142 | bAig_Manager_t *manager, |
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143 | bAigEdge_t nodeIndex) |
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144 | { |
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145 | bAigEdge_t next; |
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146 | |
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147 | /*if(nodeIndex == bAig_NULL) return(nodeIndex);*/ |
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148 | |
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149 | //Bing: |
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150 | if(nodeIndex == bAig_NULL|| |
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151 | nodeIndex == bAig_One || |
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152 | nodeIndex == bAig_Zero) |
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153 | return(nodeIndex); |
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154 | |
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155 | while(bAigGetPassFlag(manager, nodeIndex)) { |
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156 | next = canonical(nodeIndex); |
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157 | if(bAig_IsInverted(nodeIndex)) next = bAig_Not(next); |
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158 | nodeIndex = next; |
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159 | } |
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160 | return(nodeIndex); |
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161 | } |
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162 | |
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163 | /**Function******************************************************************** |
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164 | |
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165 | Synopsis [Merge two functionally equivalent node.] |
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166 | |
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167 | Description [This function merges the equivalent two nodes. ] |
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168 | |
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169 | SideEffects [] |
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170 | |
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171 | SeeAlso [] |
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172 | |
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173 | ******************************************************************************/ |
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174 | int |
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175 | bAig_Merge( |
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176 | bAig_Manager_t *manager, |
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177 | bAigEdge_t nodeIndex1, |
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178 | bAigEdge_t nodeIndex2) |
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179 | { |
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180 | bAigEdge_t newNodeIndex, nodeIndex, tnodeIndex; |
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181 | bAigEdge_t leftIndex, rightIndex; |
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182 | bAigEdge_t outIndex, *pfan; |
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183 | int id1, id2; |
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184 | bAigEdge_t cur; |
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185 | bdd_t **bddArray; |
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186 | array_t *nodeArray; |
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187 | int i, ii, iii; |
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188 | long *ManagerNodesArray; |
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189 | |
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190 | nodeIndex1 = bAig_GetCanonical(manager, nodeIndex1); |
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191 | nodeIndex2 = bAig_GetCanonical(manager, nodeIndex2); |
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192 | |
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193 | if(nodeIndex1 == nodeIndex2) return(nodeIndex1); |
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194 | |
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195 | |
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196 | ManagerNodesArray = manager->NodesArray; |
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197 | |
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198 | |
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199 | newNodeIndex = nodeIndex1; |
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200 | if (bAig_NonInvertedEdge(nodeIndex1) > bAig_NonInvertedEdge(nodeIndex2)){ |
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201 | nodeIndex1 = nodeIndex2; |
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202 | nodeIndex2 = newNodeIndex; |
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203 | } |
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204 | |
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205 | if(bAig_IsInverted(nodeIndex2)) { |
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206 | nodeIndex1 = bAig_Not(nodeIndex1); |
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207 | nodeIndex2 = bAig_Not(nodeIndex2); |
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208 | } |
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209 | |
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210 | nodeArray = array_alloc(bAigEdge_t, 0); |
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211 | nodeIndex = nodeIndex2; |
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212 | array_insert_last(bAigEdge_t, nodeArray, nodeIndex); |
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213 | while(bAig_NonInvertedEdge(canonical(nodeIndex)) != bAig_NonInvertedEdge(nodeIndex2)){ |
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214 | if(bAig_IsInverted(nodeIndex)) |
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215 | nodeIndex = bAig_Not(canonical(nodeIndex)); |
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216 | else |
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217 | nodeIndex = canonical(nodeIndex); |
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218 | array_insert_last(bAigEdge_t, nodeArray, nodeIndex); |
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219 | } |
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220 | |
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221 | bAigSetPassFlag(manager, nodeIndex2); |
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222 | nodeIndex = nodeIndex1; |
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223 | while(bAig_NonInvertedEdge(canonical(nodeIndex)) != bAig_NonInvertedEdge(nodeIndex1)) { |
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224 | if(bAig_IsInverted(nodeIndex)) |
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225 | nodeIndex = bAig_Not(canonical(nodeIndex)); |
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226 | else |
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227 | nodeIndex = canonical(nodeIndex); |
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228 | } |
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229 | |
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230 | for(i=0; i<array_n(nodeArray); i++) { |
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231 | tnodeIndex = array_fetch(bAigEdge_t, nodeArray, i); |
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232 | if(bAig_IsInverted(nodeIndex)) |
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233 | canonical(nodeIndex) = bAig_Not(tnodeIndex); |
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234 | else |
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235 | canonical(nodeIndex) = tnodeIndex; |
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236 | |
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237 | if(bAig_IsInverted(nodeIndex)) |
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238 | nodeIndex = bAig_Not(canonical(nodeIndex)); |
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239 | else |
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240 | nodeIndex = canonical(nodeIndex); |
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241 | } |
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242 | |
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243 | if(bAig_IsInverted(nodeIndex)) { |
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244 | canonical(nodeIndex) = bAig_Not(nodeIndex1); |
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245 | } |
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246 | else { |
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247 | canonical(nodeIndex) = nodeIndex1; |
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248 | } |
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249 | array_free(nodeArray); |
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250 | |
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251 | nodeArray = array_alloc(bAigEdge_t, 0); |
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252 | bAigEdgeForEachFanout(manager, nodeIndex2, cur, ii, iii, pfan) { |
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253 | cur = cur >> 1; |
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254 | cur = bAig_NonInvertedEdge(cur); |
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255 | array_insert_last(bAigEdge_t, nodeArray, cur); |
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256 | } |
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257 | |
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258 | for(i=0; i<array_n(nodeArray); i++) { |
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259 | outIndex = array_fetch(bAigEdge_t, nodeArray, i); |
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260 | leftIndex = leftChild(outIndex); |
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261 | rightIndex = rightChild(outIndex); |
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262 | |
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263 | HashTableDelete(manager, outIndex); |
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264 | |
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265 | newNodeIndex = bAig_And(manager, leftIndex, rightIndex); |
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266 | |
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267 | bAig_Merge(manager, newNodeIndex, outIndex); |
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268 | |
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269 | } |
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270 | array_free(nodeArray); |
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271 | |
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272 | bddArray = manager->bddArray; |
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273 | id1 = bAigNodeID(nodeIndex1); |
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274 | id2 = bAigNodeID(nodeIndex2); |
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275 | if(bddArray[id1] == 0 && bddArray[id2]){ |
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276 | if(bAig_IsInverted(nodeIndex2)) { |
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277 | if(bAig_IsInverted(nodeIndex1)) { |
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278 | bddArray[id1] = bdd_dup(bddArray[id2]); |
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279 | } |
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280 | else { |
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281 | bddArray[id1] = bdd_not(bddArray[id2]); |
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282 | } |
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283 | } |
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284 | else { |
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285 | if(bAig_IsInverted(nodeIndex1)) { |
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286 | bddArray[id1] = bdd_not(bddArray[id2]); |
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287 | } |
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288 | else { |
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289 | bddArray[id1] = bdd_dup(bddArray[id2]); |
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290 | } |
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291 | } |
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292 | } |
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293 | return(nodeIndex1); |
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294 | } |
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295 | |
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296 | |
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297 | |
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298 | /**Function******************************************************************** |
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299 | |
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300 | Synopsis [Print node information.] |
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301 | |
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302 | Description [Print node information.] |
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303 | |
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304 | SideEffects [] |
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305 | |
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306 | SeeAlso [] |
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307 | |
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308 | ******************************************************************************/ |
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309 | |
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310 | void |
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311 | bAig_PrintNode( |
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312 | bAig_Manager_t *manager, |
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313 | bAigEdge_t i) |
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314 | { |
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315 | int j, size; |
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316 | long cur, *pfan; |
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317 | |
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318 | fprintf(vis_stdout, "nodeIndex : %ld (%ld)\n", i, bAigNodeID(i)); |
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319 | fprintf(vis_stdout, "child : %ld%c, %ld%c\n", |
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320 | bAig_NonInvertedEdge(leftChild(i)), bAig_IsInverted(leftChild(i)) ? '\'' : ' ', |
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321 | bAig_NonInvertedEdge(rightChild(i)), bAig_IsInverted(rightChild(i)) ? '\'' : ' '); |
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322 | fprintf(vis_stdout, "canonical : %s (%ld)\n", |
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323 | bAigGetPassFlag(manager, i) ? "pass" : "true", bAig_GetCanonical(manager, i)); |
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324 | fprintf(vis_stdout, "refCount : %ld\n", nFanout(i)); |
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325 | fprintf(vis_stdout, " : "); |
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326 | size = nFanout(i); |
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327 | for(j=0, pfan = (bAigEdge_t *)fanout(i); j<size; j++) { |
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328 | cur = pfan[j]; |
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329 | cur = cur >> 1; |
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330 | fprintf(vis_stdout, " %ld", cur); |
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331 | } |
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332 | fprintf(vis_stdout, "\n"); |
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333 | |
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334 | fprintf(vis_stdout, "next : %ld\n", next(i)); |
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335 | fflush(vis_stdout); |
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336 | } |
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337 | |
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338 | |
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339 | /**Function******************************************************************** |
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340 | |
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341 | Synopsis [Performs the Logical AND of two nodes.] |
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342 | |
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343 | Description [This function performs the Logical AND of two nodes. The inputs |
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344 | are the indices of the two nodes. This function returns the index |
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345 | of the result node.] |
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346 | |
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347 | SideEffects [] |
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348 | |
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349 | SeeAlso [] |
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350 | |
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351 | ******************************************************************************/ |
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352 | bAigEdge_t |
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353 | bAig_And( |
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354 | bAig_Manager_t *manager, |
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355 | bAigEdge_t nodeIndex1, |
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356 | bAigEdge_t nodeIndex2) |
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357 | { |
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358 | |
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359 | bAigEdge_t newNodeIndex; |
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360 | |
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361 | nodeIndex1 = bAig_GetCanonical(manager, nodeIndex1); |
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362 | nodeIndex2 = bAig_GetCanonical(manager, nodeIndex2); |
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363 | |
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364 | newNodeIndex = nodeIndex1; /* The left node has the smallest index */ |
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365 | if (bAig_NonInvertedEdge(nodeIndex1) > bAig_NonInvertedEdge(nodeIndex2)){ |
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366 | nodeIndex1 = nodeIndex2; |
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367 | nodeIndex2 = newNodeIndex; |
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368 | } |
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369 | |
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370 | if ( nodeIndex2 == bAig_Zero ) { |
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371 | return bAig_Zero; |
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372 | } |
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373 | if ( nodeIndex1 == bAig_Zero ) { |
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374 | return bAig_Zero; |
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375 | } |
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376 | if ( nodeIndex2 == bAig_One ) { |
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377 | return nodeIndex1; |
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378 | } |
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379 | if ( nodeIndex1 == bAig_One ) { |
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380 | return nodeIndex2; |
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381 | } |
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382 | if ( nodeIndex1 == nodeIndex2 ) { |
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383 | return nodeIndex1; |
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384 | } |
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385 | if ( nodeIndex1 == bAig_Not(nodeIndex2) ) { |
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386 | return bAig_Zero; |
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387 | } |
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388 | |
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389 | /* Look for the new node in the Hash table */ |
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390 | newNodeIndex = HashTableLookup(manager, nodeIndex1, nodeIndex2); |
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391 | |
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392 | if (newNodeIndex == bAig_NULL){ |
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393 | if(bAigIsVar(manager, nodeIndex1) && bAigIsVar(manager, nodeIndex2)) |
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394 | newNodeIndex = bAig_And2(manager, nodeIndex1, nodeIndex2); |
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395 | else if(bAigIsVar(manager, nodeIndex1)) |
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396 | newNodeIndex = bAig_And3(manager, nodeIndex1, nodeIndex2); |
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397 | else if(bAigIsVar(manager, nodeIndex2)) |
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398 | newNodeIndex = bAig_And3(manager, nodeIndex2, nodeIndex1); |
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399 | else { |
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400 | newNodeIndex = bAig_And4(manager, nodeIndex1, nodeIndex2); |
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401 | } |
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402 | } |
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403 | |
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404 | return newNodeIndex; |
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405 | |
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406 | } |
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407 | |
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408 | /**Function******************************************************************** |
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409 | |
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410 | Synopsis [Structural hashing for and2] |
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411 | |
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412 | Description [Structural hashing for and2] |
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413 | |
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414 | SideEffects [] |
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415 | |
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416 | SeeAlso [] |
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417 | |
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418 | ******************************************************************************/ |
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419 | bAigEdge_t |
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420 | bAig_And2( |
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421 | bAig_Manager_t *manager, |
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422 | bAigEdge_t nodeIndex1, |
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423 | bAigEdge_t nodeIndex2) |
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424 | { |
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425 | bAigEdge_t newNodeIndex; |
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426 | |
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427 | nodeIndex1 = bAig_GetCanonical(manager, nodeIndex1); |
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428 | nodeIndex2 = bAig_GetCanonical(manager, nodeIndex2); |
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429 | |
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430 | newNodeIndex = nodeIndex1; /* The left node has the smallest index */ |
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431 | if (bAig_NonInvertedEdge(nodeIndex1) > bAig_NonInvertedEdge(nodeIndex2)){ |
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432 | nodeIndex1 = nodeIndex2; |
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433 | nodeIndex2 = newNodeIndex; |
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434 | } |
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435 | if ( nodeIndex2 == bAig_Zero ) { |
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436 | return bAig_Zero; |
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437 | } |
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438 | if ( nodeIndex1 == bAig_Zero ) { |
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439 | return bAig_Zero; |
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440 | } |
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441 | if ( nodeIndex2 == bAig_One ) { |
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442 | return nodeIndex1; |
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443 | } |
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444 | if ( nodeIndex1 == bAig_One ) { |
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445 | return nodeIndex2; |
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446 | } |
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447 | if ( nodeIndex1 == nodeIndex2 ) { |
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448 | return nodeIndex1; |
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449 | } |
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450 | if ( nodeIndex1 == bAig_Not(nodeIndex2) ) { |
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451 | return bAig_Zero; |
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452 | } |
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453 | newNodeIndex = HashTableLookup(manager, nodeIndex1, nodeIndex2); |
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454 | |
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455 | if (newNodeIndex == bAig_NULL){ |
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456 | newNodeIndex = bAigCreateAndNode(manager, nodeIndex1, nodeIndex2) ; |
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457 | |
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458 | HashTableAdd(manager, newNodeIndex, nodeIndex1, nodeIndex2); |
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459 | connectOutput(manager, nodeIndex1, newNodeIndex, 0); |
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460 | connectOutput(manager, nodeIndex2, newNodeIndex, 1); |
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461 | |
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462 | #if 0 |
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463 | #ifdef LEARNING_ |
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464 | tNodeIndex = HashTableLookup(manager, bAig_Not(nodeIndex1), nodeIndex2); |
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465 | if(tNodeIndex) bAig_Learn(manager, nodeIndex1, nodeIndex2); |
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466 | |
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467 | tNodeIndex = HashTableLookup(manager, nodeIndex1, bAig_Not(nodeIndex2)); |
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468 | if(tNodeIndex) bAig_Learn(manager, nodeIndex2, nodeIndex1); |
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469 | #endif |
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470 | #endif |
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471 | } |
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472 | return newNodeIndex; |
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473 | |
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474 | } |
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475 | |
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476 | |
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477 | /**Function******************************************************************** |
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478 | |
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479 | Synopsis [Performs the Logical OR of two nodes.] |
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480 | |
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481 | Description [This function performs the Logical OR of two nodes. The inputs |
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482 | are the indices of the two nodes. This function returns the index |
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483 | of the result node.] |
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484 | |
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485 | SideEffects [] |
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486 | |
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487 | SeeAlso [] |
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488 | |
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489 | ******************************************************************************/ |
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490 | bAigEdge_t |
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491 | bAig_Or( |
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492 | bAig_Manager_t *manager, |
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493 | bAigEdge_t nodeIndex1, |
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494 | bAigEdge_t nodeIndex2) |
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495 | { |
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496 | return ( bAig_Not(bAig_And(manager, bAig_Not(nodeIndex1), bAig_Not(nodeIndex2)))); |
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497 | } |
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498 | |
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499 | /**Function******************************************************************** |
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500 | |
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501 | Synopsis [Performs the Logical XOR of two nodes.] |
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502 | |
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503 | Description [This function performs the Logical XOR of two nodes. The inputs |
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504 | are the indices of the two nodes. This function returns the index |
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505 | of the result node.] |
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506 | |
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507 | SideEffects [] |
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508 | |
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509 | SeeAlso [] |
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510 | |
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511 | ******************************************************************************/ |
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512 | bAigEdge_t |
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513 | bAig_Xor( |
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514 | bAig_Manager_t *manager, |
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515 | bAigEdge_t nodeIndex1, |
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516 | bAigEdge_t nodeIndex2) |
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517 | { |
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518 | return bAig_Or(manager, |
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519 | bAig_And(manager, nodeIndex1, bAig_Not(nodeIndex2)), |
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520 | bAig_And(manager, bAig_Not(nodeIndex1),nodeIndex2) |
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521 | ); |
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522 | } |
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523 | |
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524 | /**Function******************************************************************** |
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525 | |
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526 | Synopsis [Performs the Logical Equal ( <--> XNOR) of two nodes.] |
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527 | |
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528 | Description [This function performs the Logical XNOR of two nodes. The inputs |
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529 | are the indices of the two nodes. This function returns the index |
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530 | of the result node.] |
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531 | |
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532 | SideEffects [] |
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533 | |
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534 | SeeAlso [] |
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535 | |
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536 | ******************************************************************************/ |
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537 | bAigEdge_t |
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538 | bAig_Eq( |
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539 | bAig_Manager_t *manager, |
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540 | bAigEdge_t nodeIndex1, |
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541 | bAigEdge_t nodeIndex2) |
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542 | { |
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543 | return bAig_Not( |
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544 | bAig_Xor(manager, nodeIndex1, nodeIndex2) |
---|
545 | ); |
---|
546 | } |
---|
547 | |
---|
548 | /**Function******************************************************************** |
---|
549 | |
---|
550 | Synopsis [Performs the Logical Then (--> Implies) of two nodes.] |
---|
551 | |
---|
552 | Description [This function performs the Logical Implies of two nodes. The inputs |
---|
553 | are the indices of the two nodes. This function returns the index |
---|
554 | of the result node.] |
---|
555 | |
---|
556 | SideEffects [] |
---|
557 | |
---|
558 | SeeAlso [] |
---|
559 | |
---|
560 | ******************************************************************************/ |
---|
561 | bAigEdge_t |
---|
562 | bAig_Then( |
---|
563 | bAig_Manager_t *manager, |
---|
564 | bAigEdge_t nodeIndex1, |
---|
565 | bAigEdge_t nodeIndex2) |
---|
566 | { |
---|
567 | return bAig_Or(manager, |
---|
568 | bAig_Not(nodeIndex1), |
---|
569 | nodeIndex2); |
---|
570 | } |
---|
571 | |
---|
572 | /**Function******************************************************************** |
---|
573 | |
---|
574 | Synopsis [create new node] |
---|
575 | |
---|
576 | Description [] |
---|
577 | |
---|
578 | SideEffects [] |
---|
579 | |
---|
580 | SeeAlso [] |
---|
581 | |
---|
582 | ******************************************************************************/ |
---|
583 | bAigEdge_t |
---|
584 | bAig_CreateNode( |
---|
585 | bAig_Manager_t *manager, |
---|
586 | bAigEdge_t nodeIndex1, |
---|
587 | bAigEdge_t nodeIndex2) |
---|
588 | { |
---|
589 | |
---|
590 | bAigEdge_t newNode = manager->nodesArraySize; |
---|
591 | |
---|
592 | if (manager->nodesArraySize >= manager->maxNodesArraySize ){ |
---|
593 | manager->maxNodesArraySize = 2* manager->maxNodesArraySize; |
---|
594 | manager->NodesArray = REALLOC(bAigEdge_t, manager->NodesArray, manager->maxNodesArraySize); |
---|
595 | manager->nameList = REALLOC(char *, manager->nameList , manager->maxNodesArraySize/bAigNodeSize); |
---|
596 | manager->bddIdArray = REALLOC(int , manager->bddIdArray , manager->maxNodesArraySize/bAigNodeSize); |
---|
597 | manager->bddArray = REALLOC(bdd_t *, manager->bddArray , manager->maxNodesArraySize/bAigNodeSize); |
---|
598 | } |
---|
599 | manager->NodesArray[bAig_NonInvertedEdge(newNode)+bAigRight] = nodeIndex2; |
---|
600 | manager->NodesArray[bAig_NonInvertedEdge(newNode)+bAigLeft] = nodeIndex1; |
---|
601 | |
---|
602 | next(newNode) = bAig_NULL; |
---|
603 | fanout(newNode) = 0; |
---|
604 | canonical(newNode) = newNode; |
---|
605 | flags(newNode) = 0; |
---|
606 | nFanout(newNode) = 0; |
---|
607 | manager->bddIdArray[bAigNodeID(newNode)] = -1; |
---|
608 | manager->bddArray[bAigNodeID(newNode)] = 0; |
---|
609 | |
---|
610 | manager->nodesArraySize +=bAigNodeSize; |
---|
611 | |
---|
612 | //Bing: for interpolation |
---|
613 | aig_value(newNode) = 2; |
---|
614 | manager->nameList[bAigNodeID(newNode)] = 0; |
---|
615 | manager->NodesArray[newNode+bAigClass] = manager->class_; |
---|
616 | |
---|
617 | return(newNode); |
---|
618 | } |
---|
619 | |
---|
620 | |
---|
621 | /**Function******************************************************************** |
---|
622 | |
---|
623 | Synopsis [Return the bAig node given its name.] |
---|
624 | |
---|
625 | SideEffects [] |
---|
626 | |
---|
627 | ******************************************************************************/ |
---|
628 | bAigEdge_t |
---|
629 | bAig_FindNodeByName( |
---|
630 | bAig_Manager_t *manager, |
---|
631 | nameType_t *name) |
---|
632 | { |
---|
633 | |
---|
634 | bAigEdge_t node; |
---|
635 | |
---|
636 | if (!st_lookup(manager->SymbolTable, name, &node)){ |
---|
637 | node = bAig_NULL; |
---|
638 | } |
---|
639 | |
---|
640 | return bAig_GetCanonical(manager, node); |
---|
641 | } |
---|
642 | |
---|
643 | |
---|
644 | /**Function******************************************************************** |
---|
645 | |
---|
646 | Synopsis [create var node ] |
---|
647 | |
---|
648 | Description [] |
---|
649 | |
---|
650 | SideEffects [] |
---|
651 | |
---|
652 | SeeAlso [] |
---|
653 | |
---|
654 | ******************************************************************************/ |
---|
655 | bAigEdge_t |
---|
656 | bAig_CreateVarNode( |
---|
657 | bAig_Manager_t *manager, |
---|
658 | nameType_t *name) |
---|
659 | { |
---|
660 | |
---|
661 | bAigEdge_t varIndex; |
---|
662 | |
---|
663 | |
---|
664 | if (!st_lookup(manager->SymbolTable, name, &varIndex)){ |
---|
665 | varIndex = bAig_CreateNode(manager, bAig_NULL, bAig_NULL); |
---|
666 | if (varIndex == bAig_NULL){ |
---|
667 | return (varIndex); |
---|
668 | } |
---|
669 | /* Insert the varaible in the Symbol Table */ |
---|
670 | st_insert(manager->SymbolTable, name, (char*) (long) varIndex); |
---|
671 | manager->nameList[bAigNodeID(varIndex)] = name; |
---|
672 | return(varIndex); |
---|
673 | } |
---|
674 | else { |
---|
675 | return (varIndex); |
---|
676 | } |
---|
677 | } |
---|
678 | |
---|
679 | /**Function******************************************************************** |
---|
680 | |
---|
681 | Synopsis [Return True if this node is Variable node] |
---|
682 | |
---|
683 | SideEffects [] |
---|
684 | |
---|
685 | ******************************************************************************/ |
---|
686 | int |
---|
687 | bAig_isVarNode( |
---|
688 | bAig_Manager_t *manager, |
---|
689 | bAigEdge_t node) |
---|
690 | { |
---|
691 | if((rightChild(node) == bAig_NULL) && (leftChild(node) == bAig_NULL)) { |
---|
692 | return 1; |
---|
693 | } |
---|
694 | return 0; |
---|
695 | } |
---|
696 | |
---|
697 | |
---|
698 | |
---|
699 | /**Function******************************************************************** |
---|
700 | |
---|
701 | Synopsis [Build the binary AND/INVERTER graph for a given bdd function] |
---|
702 | |
---|
703 | SideEffects [Build the binary AND/INVERTER graph for a given bdd function. |
---|
704 | We assume that the return bdd nodes from the foreach_bdd_node are |
---|
705 | in the order from childeren to parent. i.e all the childeren |
---|
706 | nodes are returned before the parent node.] |
---|
707 | |
---|
708 | SideEffects [] |
---|
709 | |
---|
710 | SeeAlso [] |
---|
711 | |
---|
712 | ******************************************************************************/ |
---|
713 | bAigEdge_t |
---|
714 | bAig_bddTobAig( |
---|
715 | bAig_Manager_t *bAigManager, |
---|
716 | bdd_t *fn) |
---|
717 | { |
---|
718 | bdd_gen *gen; |
---|
719 | bdd_node *node, *thenNode, *elseNode, *funcNode; |
---|
720 | bdd_manager *bddManager = bdd_get_manager(fn); |
---|
721 | /* |
---|
722 | Used to read the variable name of a bdd node. |
---|
723 | */ |
---|
724 | array_t *mvar_list = mdd_ret_mvar_list(bddManager); |
---|
725 | array_t *bvar_list = mdd_ret_bvar_list(bddManager); |
---|
726 | bvar_type bv; |
---|
727 | mvar_type mv; |
---|
728 | |
---|
729 | bdd_node *one = bdd_read_one(bddManager); |
---|
730 | int is_complemented; |
---|
731 | int flag; |
---|
732 | bAigEdge_t var, left, right, result; |
---|
733 | |
---|
734 | char name[100]; |
---|
735 | st_table *bddTObaigTable; |
---|
736 | |
---|
737 | if (fn == NULL){ |
---|
738 | return bAig_NULL; |
---|
739 | } |
---|
740 | funcNode = bdd_get_node(fn, &is_complemented); |
---|
741 | if (bdd_is_constant(funcNode)){ |
---|
742 | return (is_complemented?bAig_Zero:bAig_One); |
---|
743 | } |
---|
744 | bddTObaigTable = st_init_table(st_numcmp, st_numhash); |
---|
745 | st_insert(bddTObaigTable, (char *) (long) bdd_regular(one), (char *) bAig_One); |
---|
746 | |
---|
747 | foreach_bdd_node(fn, gen, node){ |
---|
748 | int nodeIndex = bdd_node_read_index(node); |
---|
749 | int index, rtnNodeIndex; |
---|
750 | |
---|
751 | if (bdd_is_constant(node)){ |
---|
752 | continue; |
---|
753 | } |
---|
754 | |
---|
755 | bv = array_fetch(bvar_type, bvar_list, nodeIndex); |
---|
756 | /* |
---|
757 | get the multi-valued varaible. |
---|
758 | */ |
---|
759 | mv = array_fetch(mvar_type, mvar_list, bv.mvar_id); |
---|
760 | arrayForEachItem(int, mv.bvars, index, rtnNodeIndex) { |
---|
761 | if (nodeIndex == rtnNodeIndex){ |
---|
762 | break; |
---|
763 | } |
---|
764 | } |
---|
765 | assert(index < mv.encode_length); |
---|
766 | /* |
---|
767 | printf("Name of bdd node %s %d\n", mv.name, index); |
---|
768 | */ |
---|
769 | sprintf(name, "%s_%d", mv.name, index); |
---|
770 | /* |
---|
771 | Create or Retrieve the bAigEdge_t w.r.t. 'name' |
---|
772 | */ |
---|
773 | var = bAig_CreateVarNode(bAigManager, util_strsav(name)); |
---|
774 | |
---|
775 | thenNode = bdd_bdd_T(node); |
---|
776 | flag = st_lookup(bddTObaigTable, (char *) (long) bdd_regular(thenNode), |
---|
777 | &left); |
---|
778 | assert(flag); |
---|
779 | |
---|
780 | elseNode = bdd_bdd_E(node); |
---|
781 | flag = st_lookup(bddTObaigTable, (char *) (long) bdd_regular(elseNode), |
---|
782 | &right); |
---|
783 | assert(flag); |
---|
784 | /* |
---|
785 | test if the elseNode is complemented arc? |
---|
786 | */ |
---|
787 | if (bdd_is_complement(elseNode)){ |
---|
788 | right = bAig_Not(right); |
---|
789 | } |
---|
790 | if (right == bAig_Zero){ /* result = var*then */ |
---|
791 | result = bAig_And(bAigManager, var, left); |
---|
792 | } else if (right == bAig_One){ /* result = then + not(var) */ |
---|
793 | result = bAig_Or(bAigManager, left, bAig_Not(var)); |
---|
794 | } else if (left == bAig_One) { /* result = var + else */ |
---|
795 | result = bAig_Or(bAigManager, var, right); |
---|
796 | } else { /* result = var * then + not(var)*else */ |
---|
797 | result = bAig_Or(bAigManager, bAig_And(bAigManager, var, left), |
---|
798 | bAig_And(bAigManager, bAig_Not(var), right)); |
---|
799 | } |
---|
800 | st_insert(bddTObaigTable, (char *) (long) bdd_regular(node), |
---|
801 | (char *) (long) result); |
---|
802 | } |
---|
803 | flag = st_lookup(bddTObaigTable, (char *) (long) bdd_regular(funcNode), |
---|
804 | &result); |
---|
805 | assert(flag); |
---|
806 | st_free_table(bddTObaigTable); |
---|
807 | |
---|
808 | if (is_complemented){ |
---|
809 | return bAig_Not(result); |
---|
810 | } else { |
---|
811 | return result; |
---|
812 | } |
---|
813 | } /* end of bAig_bddtobAig() */ |
---|
814 | |
---|
815 | |
---|
816 | /**Function******************************************************************** |
---|
817 | |
---|
818 | Synopsis [Print dot file for AIG nodes] |
---|
819 | |
---|
820 | SideEffects [] |
---|
821 | |
---|
822 | ******************************************************************************/ |
---|
823 | int |
---|
824 | bAig_PrintDot( |
---|
825 | FILE *fp, |
---|
826 | bAig_Manager_t *manager) |
---|
827 | { |
---|
828 | long i; |
---|
829 | |
---|
830 | /* |
---|
831 | * Write out the header for the output file. |
---|
832 | */ |
---|
833 | (void) fprintf(fp, "digraph \"AndInv\" {\n rotate=90;\n"); |
---|
834 | (void) fprintf(fp, " margin=0.5;\n label=\"AndInv\";\n"); |
---|
835 | (void) fprintf(fp, " size=\"10,7.5\";\n ratio=\"fill\";\n"); |
---|
836 | |
---|
837 | |
---|
838 | for (i=bAigFirstNodeIndex ; i< manager->nodesArraySize ; i+=bAigNodeSize){ |
---|
839 | (void) fprintf(fp,"Node%ld [label=\"%s \"];\n",i,bAig_NodeReadName(manager, i)); |
---|
840 | } |
---|
841 | for (i=bAigFirstNodeIndex ; i< manager->nodesArraySize ; i+=bAigNodeSize){ |
---|
842 | if (rightChild(i) != bAig_NULL){ |
---|
843 | if (bAig_IsInverted(rightChild(i))){ |
---|
844 | (void) fprintf(fp,"Node%ld -> Node%ld [color = red];\n",bAig_NonInvertedEdge(rightChild(i)), i); |
---|
845 | } |
---|
846 | else{ |
---|
847 | (void) fprintf(fp,"Node%ld -> Node%ld;\n",bAig_NonInvertedEdge(rightChild(i)), i); |
---|
848 | } |
---|
849 | if (bAig_IsInverted(leftChild(i))){ |
---|
850 | (void) fprintf(fp,"Node%ld -> Node%ld [color = red];\n",bAig_NonInvertedEdge(leftChild(i)), i); |
---|
851 | } |
---|
852 | else{ |
---|
853 | (void) fprintf(fp,"Node%ld -> Node%ld;\n",bAig_NonInvertedEdge(leftChild(i)), i); |
---|
854 | } |
---|
855 | }/* if */ |
---|
856 | }/*for */ |
---|
857 | |
---|
858 | (void) fprintf(fp, "}\n"); |
---|
859 | |
---|
860 | return 1; |
---|
861 | } |
---|
862 | |
---|
863 | |
---|
864 | |
---|
865 | /**Function******************************************************************** |
---|
866 | |
---|
867 | Synopsis [Set pass flag for node] |
---|
868 | |
---|
869 | Description [] |
---|
870 | |
---|
871 | SideEffects [] |
---|
872 | |
---|
873 | SeeAlso [] |
---|
874 | |
---|
875 | ******************************************************************************/ |
---|
876 | void |
---|
877 | bAigSetPassFlag( |
---|
878 | bAig_Manager_t *manager, |
---|
879 | bAigEdge_t node) |
---|
880 | { |
---|
881 | |
---|
882 | flags(node) |= CanonicalBitMask; |
---|
883 | } |
---|
884 | |
---|
885 | /**Function******************************************************************** |
---|
886 | |
---|
887 | Synopsis [Reset pass flag for node] |
---|
888 | |
---|
889 | Description [] |
---|
890 | |
---|
891 | SideEffects [] |
---|
892 | |
---|
893 | SeeAlso [] |
---|
894 | |
---|
895 | ******************************************************************************/ |
---|
896 | void |
---|
897 | bAigResetPassFlag( |
---|
898 | bAig_Manager_t *manager, |
---|
899 | bAigEdge_t node) |
---|
900 | { |
---|
901 | |
---|
902 | flags(node) &= ResetCanonicalBitMask; |
---|
903 | } |
---|
904 | |
---|
905 | /**Function******************************************************************** |
---|
906 | |
---|
907 | Synopsis [Get pass flag for node] |
---|
908 | |
---|
909 | Description [] |
---|
910 | |
---|
911 | SideEffects [] |
---|
912 | |
---|
913 | SeeAlso [] |
---|
914 | |
---|
915 | ******************************************************************************/ |
---|
916 | int |
---|
917 | bAigGetPassFlag( |
---|
918 | bAig_Manager_t *manager, |
---|
919 | bAigEdge_t node) |
---|
920 | |
---|
921 | { |
---|
922 | |
---|
923 | return((flags(node) & CanonicalBitMask) != 0); |
---|
924 | } |
---|
925 | |
---|
926 | |
---|
927 | |
---|
928 | /**Function******************************************************************** |
---|
929 | |
---|
930 | Synopsis [Create AND node and assign name to it ] |
---|
931 | |
---|
932 | Description [] |
---|
933 | |
---|
934 | SideEffects [] |
---|
935 | |
---|
936 | SeeAlso [] |
---|
937 | |
---|
938 | ******************************************************************************/ |
---|
939 | bAigEdge_t |
---|
940 | bAigCreateAndNode( |
---|
941 | bAig_Manager_t *manager, |
---|
942 | bAigEdge_t node1, |
---|
943 | bAigEdge_t node2) |
---|
944 | { |
---|
945 | |
---|
946 | bAigEdge_t varIndex; |
---|
947 | char *name = NIL(char); |
---|
948 | char *node1Str = util_inttostr(node1); |
---|
949 | char *node2Str = util_inttostr(node2); |
---|
950 | |
---|
951 | name = util_strcat4("Nd", node1Str,"_", node2Str); |
---|
952 | while (st_lookup(manager->SymbolTable, name, &varIndex)){ |
---|
953 | printf("Find redundant node at %ld %ld\n", node1, node2); |
---|
954 | name = util_strcat3(name, node1Str, node2Str); |
---|
955 | } |
---|
956 | FREE(node1Str); |
---|
957 | FREE(node2Str); |
---|
958 | varIndex = bAig_CreateNode(manager, node1, node2); |
---|
959 | if (varIndex == bAig_NULL){ |
---|
960 | FREE(name); |
---|
961 | return (varIndex); |
---|
962 | } |
---|
963 | /* Insert the varaible in the Symbol Table */ |
---|
964 | st_insert(manager->SymbolTable, name, (char*) (long) varIndex); |
---|
965 | manager->nameList[bAigNodeID(varIndex)] = name; |
---|
966 | |
---|
967 | return(varIndex); |
---|
968 | |
---|
969 | } |
---|
970 | |
---|
971 | /*---------------------------------------------------------------------------*/ |
---|
972 | /* Definition of static functions */ |
---|
973 | /*---------------------------------------------------------------------------*/ |
---|
974 | |
---|
975 | /**Function******************************************************************** |
---|
976 | |
---|
977 | Synopsis [Connect fanin fanout of two AIG nodes] |
---|
978 | |
---|
979 | Description [] |
---|
980 | |
---|
981 | SideEffects [] |
---|
982 | |
---|
983 | SeeAlso [] |
---|
984 | |
---|
985 | ******************************************************************************/ |
---|
986 | static void |
---|
987 | connectOutput( |
---|
988 | bAig_Manager_t *manager, |
---|
989 | bAigEdge_t from, |
---|
990 | bAigEdge_t to, |
---|
991 | int inputIndex) |
---|
992 | { |
---|
993 | bAigEdge_t *pfan; |
---|
994 | int nfan; |
---|
995 | |
---|
996 | to = bAig_NonInvertedEdge(to); |
---|
997 | pfan = (bAigEdge_t *)fanout(from); |
---|
998 | nfan = nFanout(from); |
---|
999 | if(nfan == 0) pfan = ALLOC(bAigEdge_t, 2); |
---|
1000 | else pfan = REALLOC(bAigEdge_t, pfan, nfan+2); |
---|
1001 | to += bAig_IsInverted(from); |
---|
1002 | to = to << 1; |
---|
1003 | to += inputIndex; |
---|
1004 | pfan[nfan++] = to; |
---|
1005 | pfan[nfan] = 0; |
---|
1006 | fanout(from) = (long)pfan; |
---|
1007 | nFanout(from) = nfan; |
---|
1008 | } |
---|
1009 | |
---|
1010 | |
---|
1011 | /**Function******************************************************************** |
---|
1012 | |
---|
1013 | Synopsis [disconnect fanin fanout of two AIG nodes] |
---|
1014 | |
---|
1015 | Description [] |
---|
1016 | |
---|
1017 | SideEffects [] |
---|
1018 | |
---|
1019 | SeeAlso [] |
---|
1020 | |
---|
1021 | static void |
---|
1022 | unconnectOutput( |
---|
1023 | bAig_Manager_t *manager, |
---|
1024 | bAigEdge_t from, |
---|
1025 | bAigEdge_t to) |
---|
1026 | { |
---|
1027 | bAigEdge_t cur, *pfan, *newfan; |
---|
1028 | int i, nfan; |
---|
1029 | |
---|
1030 | from = bAig_NonInvertedEdge(from); |
---|
1031 | to = bAig_NonInvertedEdge(to); |
---|
1032 | |
---|
1033 | pfan = (bAigEdge_t *)fanout(from); |
---|
1034 | nfan = nFanout(from); |
---|
1035 | newfan = (bAigEdge_t *)malloc(sizeof(bAigEdge_t)*(nfan)); |
---|
1036 | for(i=0; i<nfan; i++) { |
---|
1037 | cur = pfan[i]; |
---|
1038 | cur = cur >> 1; |
---|
1039 | cur = bAig_NonInvertedEdge(cur); |
---|
1040 | if(cur == to) { |
---|
1041 | memcpy(newfan, pfan, sizeof(bAigEdge_t)*i); |
---|
1042 | memcpy(&(newfan[i]), &(pfan[i+1]), sizeof(bAigEdge_t)*(nfan-i-1)); |
---|
1043 | newfan[nfan-1] = 0; |
---|
1044 | fanout(from) = (int)newfan; |
---|
1045 | free(pfan); |
---|
1046 | nFanout(from) = nfan-1; |
---|
1047 | break; |
---|
1048 | } |
---|
1049 | } |
---|
1050 | } |
---|
1051 | ******************************************************************************/ |
---|
1052 | |
---|
1053 | |
---|
1054 | /**Function******************************************************************** |
---|
1055 | |
---|
1056 | Synopsis [Look for the node in the Hash Table.] |
---|
1057 | |
---|
1058 | Description [.] |
---|
1059 | |
---|
1060 | SideEffects [] |
---|
1061 | |
---|
1062 | SeeAlso [] |
---|
1063 | |
---|
1064 | ******************************************************************************/ |
---|
1065 | static bAigEdge_t |
---|
1066 | HashTableLookup( |
---|
1067 | bAig_Manager_t *manager, |
---|
1068 | bAigEdge_t node1, |
---|
1069 | bAigEdge_t node2) |
---|
1070 | { |
---|
1071 | bAigEdge_t key = HashTableFunction(node1, node2); |
---|
1072 | bAigEdge_t node; |
---|
1073 | |
---|
1074 | node = manager->HashTable[key]; |
---|
1075 | if (node == bAig_NULL) { |
---|
1076 | return bAig_NULL; |
---|
1077 | } |
---|
1078 | else{ |
---|
1079 | while ( (rightChild(bAig_NonInvertedEdge(node)) != node2) || |
---|
1080 | (leftChild(bAig_NonInvertedEdge(node)) != node1)) { |
---|
1081 | |
---|
1082 | if (next(bAig_NonInvertedEdge(node)) == bAig_NULL){ |
---|
1083 | return(bAig_NULL); |
---|
1084 | } |
---|
1085 | node = next(bAig_NonInvertedEdge(node)); /* Get the next Node */ |
---|
1086 | } /* While loop */ |
---|
1087 | return(node); |
---|
1088 | |
---|
1089 | } /* If Then Else */ |
---|
1090 | |
---|
1091 | } /* End of HashTableLookup() */ |
---|
1092 | |
---|
1093 | /**Function******************************************************************** |
---|
1094 | |
---|
1095 | Synopsis [Add a node in the Hash Table.] |
---|
1096 | |
---|
1097 | Description [] |
---|
1098 | |
---|
1099 | SideEffects [] |
---|
1100 | |
---|
1101 | SeeAlso [] |
---|
1102 | |
---|
1103 | ******************************************************************************/ |
---|
1104 | static int |
---|
1105 | HashTableAdd( |
---|
1106 | bAig_Manager_t *manager, |
---|
1107 | bAigEdge_t nodeIndexParent, |
---|
1108 | bAigEdge_t nodeIndex1, |
---|
1109 | bAigEdge_t nodeIndex2) |
---|
1110 | { |
---|
1111 | bAigEdge_t key = HashTableFunction(nodeIndex1, nodeIndex2); |
---|
1112 | bAigEdge_t nodeIndex; |
---|
1113 | bAigEdge_t node; |
---|
1114 | |
---|
1115 | nodeIndex = manager->HashTable[key]; |
---|
1116 | if (nodeIndex == bAig_NULL) { |
---|
1117 | manager->HashTable[key] = nodeIndexParent; |
---|
1118 | return TRUE; |
---|
1119 | } |
---|
1120 | else{ |
---|
1121 | node = nodeIndex; |
---|
1122 | nodeIndex = next(bAig_NonInvertedEdge(nodeIndex)); /* Get the Node */ |
---|
1123 | while (nodeIndex != bAig_NULL) { |
---|
1124 | node = nodeIndex; |
---|
1125 | nodeIndex = next(bAig_NonInvertedEdge(nodeIndex)); |
---|
1126 | } |
---|
1127 | next(bAig_NonInvertedEdge(node)) = nodeIndexParent; |
---|
1128 | return TRUE; |
---|
1129 | } |
---|
1130 | |
---|
1131 | } /* End of HashTableAdd() */ |
---|
1132 | |
---|
1133 | |
---|
1134 | /**Function******************************************************************** |
---|
1135 | |
---|
1136 | Synopsis [Hash table delete] |
---|
1137 | |
---|
1138 | Description [Hash table delete] |
---|
1139 | |
---|
1140 | SideEffects [] |
---|
1141 | |
---|
1142 | SeeAlso [] |
---|
1143 | |
---|
1144 | ******************************************************************************/ |
---|
1145 | static int |
---|
1146 | HashTableDelete( |
---|
1147 | bAig_Manager_t *manager, |
---|
1148 | bAigEdge_t node) |
---|
1149 | { |
---|
1150 | bAigEdge_t key = HashTableFunction(leftChild(node), rightChild(node)); |
---|
1151 | bAigEdge_t nodeIndex; |
---|
1152 | |
---|
1153 | nodeIndex = manager->HashTable[key]; |
---|
1154 | if (nodeIndex == node) { |
---|
1155 | manager->HashTable[key] = next(node); |
---|
1156 | return TRUE; |
---|
1157 | } |
---|
1158 | else{ |
---|
1159 | while(nodeIndex && next(bAig_NonInvertedEdge(nodeIndex)) != node) |
---|
1160 | nodeIndex = next(bAig_NonInvertedEdge(nodeIndex)); |
---|
1161 | |
---|
1162 | next(bAig_NonInvertedEdge(nodeIndex)) = |
---|
1163 | next(bAig_NonInvertedEdge(next(bAig_NonInvertedEdge(nodeIndex)))); |
---|
1164 | return TRUE; |
---|
1165 | } |
---|
1166 | |
---|
1167 | } /* End of HashTableAdd() */ |
---|
1168 | |
---|
1169 | |
---|
1170 | /**Function******************************************************************** |
---|
1171 | |
---|
1172 | Synopsis [Structural hasing for and4] |
---|
1173 | |
---|
1174 | Description [Structural hasing for and4] |
---|
1175 | |
---|
1176 | SideEffects [] |
---|
1177 | |
---|
1178 | SeeAlso [] |
---|
1179 | |
---|
1180 | ******************************************************************************/ |
---|
1181 | |
---|
1182 | bAigEdge_t |
---|
1183 | bAig_And4( |
---|
1184 | bAig_Manager_t *manager, |
---|
1185 | bAigEdge_t l, |
---|
1186 | bAigEdge_t r) |
---|
1187 | { |
---|
1188 | int caseIndex, caseSig; |
---|
1189 | bAigEdge_t ll, lr, rl, rr; |
---|
1190 | bAigEdge_t t1, t2; |
---|
1191 | |
---|
1192 | ll = leftChild(l); |
---|
1193 | lr = rightChild(l); |
---|
1194 | rl = leftChild(r); |
---|
1195 | rr = rightChild(r); |
---|
1196 | |
---|
1197 | if(bAigCompareNode(l, rl) || |
---|
1198 | bAigCompareNode(l, rr)) { |
---|
1199 | return(bAig_And3(manager, l, r)); |
---|
1200 | } |
---|
1201 | else if(bAigCompareNode(r, ll) || |
---|
1202 | bAigCompareNode(r, lr)) { |
---|
1203 | return(bAig_And3(manager, r, l)); |
---|
1204 | } |
---|
1205 | |
---|
1206 | if(ll > lr+1) bAigSwap(ll, lr); |
---|
1207 | if(rl > rr+1) bAigSwap(rl, rr); |
---|
1208 | |
---|
1209 | caseIndex = 0; /* (a b)(c d) */ |
---|
1210 | if(bAigCompareNode(ll, rl)) { |
---|
1211 | if(bAigCompareNode(lr, rr)) { |
---|
1212 | caseIndex = 4; /* (a b) (a b) */ |
---|
1213 | } |
---|
1214 | else { |
---|
1215 | caseIndex = 1; /* (a b) (a c) */ |
---|
1216 | if(lr > rr+1) { |
---|
1217 | bAigSwap(ll, rl); |
---|
1218 | bAigSwap(lr, rr); |
---|
1219 | bAigSwap(l, r); |
---|
1220 | } |
---|
1221 | } |
---|
1222 | } |
---|
1223 | else if(bAigCompareNode(lr, rl)) { |
---|
1224 | caseIndex = 2; /* (b a)(a c) */ |
---|
1225 | } |
---|
1226 | else if(bAigCompareNode(lr, rr)) { |
---|
1227 | caseIndex = 3; /* (b a)(c a) */ |
---|
1228 | if(ll > rl+1) { |
---|
1229 | bAigSwap(ll, rl); |
---|
1230 | bAigSwap(lr, rr); |
---|
1231 | bAigSwap(l, r); |
---|
1232 | } |
---|
1233 | } |
---|
1234 | else if(bAigCompareNode(ll, rr)) { |
---|
1235 | /* (a b)(c a) */ |
---|
1236 | bAigSwap(ll, rl); |
---|
1237 | bAigSwap(lr, rr); |
---|
1238 | bAigSwap(l, r); |
---|
1239 | caseIndex = 2; /* (c a )(a b) because of c < b */ |
---|
1240 | } |
---|
1241 | |
---|
1242 | caseSig = 0; |
---|
1243 | if(bAig_IsInverted(ll)) caseSig += 32; |
---|
1244 | if(bAig_IsInverted(lr)) caseSig += 16; |
---|
1245 | if(bAig_IsInverted(l)) caseSig += 8; |
---|
1246 | if(bAig_IsInverted(rl)) caseSig += 4; |
---|
1247 | if(bAig_IsInverted(rr)) caseSig += 2; |
---|
1248 | if(bAig_IsInverted(r)) caseSig += 1; |
---|
1249 | /** |
---|
1250 | fprintf(vis_stdout, "Index: %d Sig: %2d (%5d%c %5d%c)%c (%5d%c %5d%c)%c (%5d, %5d)\n", |
---|
1251 | caseIndex, caseSig, |
---|
1252 | bAig_NonInvertedEdge(ll), bAig_IsInverted(ll) ? '\'' : ' ', |
---|
1253 | bAig_NonInvertedEdge(lr), bAig_IsInverted(lr) ? '\'' : ' ', |
---|
1254 | bAig_IsInverted(l) ? '\'' : ' ', |
---|
1255 | bAig_NonInvertedEdge(rl), bAig_IsInverted(rl) ? '\'' : ' ', |
---|
1256 | bAig_NonInvertedEdge(rr), bAig_IsInverted(rr) ? '\'' : ' ', |
---|
1257 | bAig_IsInverted(r) ? '\'' : ' ', |
---|
1258 | bAig_NonInvertedEdge(l), bAig_NonInvertedEdge(r) |
---|
1259 | ); |
---|
1260 | **/ |
---|
1261 | if(caseIndex == 0) { |
---|
1262 | return(bAig_And2(manager, l, r)); |
---|
1263 | } |
---|
1264 | else if(caseIndex == 1) { |
---|
1265 | switch(caseSig) { |
---|
1266 | case 19 : |
---|
1267 | case 17 : |
---|
1268 | case 3 : |
---|
1269 | case 1 : |
---|
1270 | case 55 : |
---|
1271 | case 53 : |
---|
1272 | case 39 : |
---|
1273 | case 37 : |
---|
1274 | t1 = bAig_And(manager, lr, bAig_Not(rr)); |
---|
1275 | t2 = bAig_And(manager, ll, t1); |
---|
1276 | return(t2); |
---|
1277 | case 18 : |
---|
1278 | case 16 : |
---|
1279 | case 2 : |
---|
1280 | case 0 : |
---|
1281 | case 54 : |
---|
1282 | case 52 : |
---|
1283 | case 38 : |
---|
1284 | case 36 : |
---|
1285 | t1 = bAig_And(manager, lr, rr); |
---|
1286 | t2 = bAig_And(manager, ll, t1); |
---|
1287 | return(t2); |
---|
1288 | case 26 : |
---|
1289 | case 24 : |
---|
1290 | case 10 : |
---|
1291 | case 8 : |
---|
1292 | case 62 : |
---|
1293 | case 60 : |
---|
1294 | case 46 : |
---|
1295 | case 44 : |
---|
1296 | t1 = bAig_And(manager, bAig_Not(lr), rr); |
---|
1297 | t2 = bAig_And(manager, ll, t1); |
---|
1298 | return(t2); |
---|
1299 | case 61 : |
---|
1300 | case 27 : |
---|
1301 | case 25 : |
---|
1302 | case 11 : |
---|
1303 | case 63 : |
---|
1304 | case 47 : |
---|
1305 | case 9 : |
---|
1306 | case 45 : |
---|
1307 | t1 = bAig_And(manager, bAig_Not(lr), bAig_Not(rr)); |
---|
1308 | t2 = bAig_Or(manager, bAig_Not(ll), t1); |
---|
1309 | return(t2); |
---|
1310 | case 23 : |
---|
1311 | case 21 : |
---|
1312 | case 7 : |
---|
1313 | case 5 : |
---|
1314 | case 51 : |
---|
1315 | case 49 : |
---|
1316 | case 35 : |
---|
1317 | case 33 : |
---|
1318 | return(l); |
---|
1319 | case 30 : |
---|
1320 | case 28 : |
---|
1321 | case 14 : |
---|
1322 | case 12 : |
---|
1323 | case 58 : |
---|
1324 | case 56 : |
---|
1325 | case 42 : |
---|
1326 | case 40 : |
---|
1327 | return(r); |
---|
1328 | case 22 : |
---|
1329 | case 20 : |
---|
1330 | case 6 : |
---|
1331 | case 4 : |
---|
1332 | case 50 : |
---|
1333 | case 48 : |
---|
1334 | case 34 : |
---|
1335 | case 32 : |
---|
1336 | return(bAig_Zero); |
---|
1337 | case 31 : |
---|
1338 | case 29 : |
---|
1339 | case 15 : |
---|
1340 | case 13 : |
---|
1341 | case 59 : |
---|
1342 | case 57 : |
---|
1343 | case 43 : |
---|
1344 | case 41 : |
---|
1345 | t1 = bAig_And2(manager, l, r); |
---|
1346 | return(t1); |
---|
1347 | } |
---|
1348 | } |
---|
1349 | else if(caseIndex == 2) { |
---|
1350 | switch(caseSig) { |
---|
1351 | case 35 : |
---|
1352 | case 33 : |
---|
1353 | case 3 : |
---|
1354 | case 1 : |
---|
1355 | case 55 : |
---|
1356 | case 53 : |
---|
1357 | case 23 : |
---|
1358 | case 21 : |
---|
1359 | t1 = bAig_And(manager, lr, bAig_Not(rr)); |
---|
1360 | t2 = bAig_And(manager, ll, t1); |
---|
1361 | return(t2); |
---|
1362 | case 34 : |
---|
1363 | case 32 : |
---|
1364 | case 2 : |
---|
1365 | case 0 : |
---|
1366 | case 54 : |
---|
1367 | case 52 : |
---|
1368 | case 22 : |
---|
1369 | case 20 : |
---|
1370 | t1 = bAig_And(manager, lr, rr); |
---|
1371 | t2 = bAig_And(manager, ll, t1); |
---|
1372 | return(t2); |
---|
1373 | case 42 : |
---|
1374 | case 40 : |
---|
1375 | case 10 : |
---|
1376 | case 8 : |
---|
1377 | case 62 : |
---|
1378 | case 60 : |
---|
1379 | case 30 : |
---|
1380 | case 28 : |
---|
1381 | t1 = bAig_And(manager, lr, rr); |
---|
1382 | t2 = bAig_And(manager, bAig_Not(ll), t1); |
---|
1383 | return(t2); |
---|
1384 | case 43 : |
---|
1385 | case 41 : |
---|
1386 | case 11 : |
---|
1387 | case 9 : |
---|
1388 | case 63 : |
---|
1389 | case 61 : |
---|
1390 | case 31 : |
---|
1391 | case 29 : |
---|
1392 | t1 = bAig_And(manager, bAig_Not(ll), bAig_Not(rr)); |
---|
1393 | t2 = bAig_Or(manager, bAig_Not(lr), t1); |
---|
1394 | return(t2); |
---|
1395 | case 39 : |
---|
1396 | case 37 : |
---|
1397 | case 7 : |
---|
1398 | case 5 : |
---|
1399 | case 51 : |
---|
1400 | case 49 : |
---|
1401 | case 19 : |
---|
1402 | case 17 : |
---|
1403 | return(l); |
---|
1404 | case 46 : |
---|
1405 | case 44 : |
---|
1406 | case 14 : |
---|
1407 | case 12 : |
---|
1408 | case 58 : |
---|
1409 | case 56 : |
---|
1410 | case 26 : |
---|
1411 | case 24 : |
---|
1412 | return(r); |
---|
1413 | case 38 : |
---|
1414 | case 36 : |
---|
1415 | case 6 : |
---|
1416 | case 4 : |
---|
1417 | case 50 : |
---|
1418 | case 48 : |
---|
1419 | case 18 : |
---|
1420 | case 16 : |
---|
1421 | return(bAig_Zero); |
---|
1422 | case 45 : |
---|
1423 | case 15 : |
---|
1424 | case 13 : |
---|
1425 | case 59 : |
---|
1426 | case 57 : |
---|
1427 | case 47 : |
---|
1428 | case 27 : |
---|
1429 | case 25 : |
---|
1430 | t1 = bAig_And2(manager, l, r); |
---|
1431 | return(t1); |
---|
1432 | } |
---|
1433 | } |
---|
1434 | else if(caseIndex == 3) { |
---|
1435 | switch(caseSig) { |
---|
1436 | case 37 : |
---|
1437 | case 33 : |
---|
1438 | case 5 : |
---|
1439 | case 1 : |
---|
1440 | case 55 : |
---|
1441 | case 51 : |
---|
1442 | case 23 : |
---|
1443 | case 19 : |
---|
1444 | t1 = bAig_And(manager, bAig_Not(rl), lr); |
---|
1445 | t2 = bAig_And(manager, ll, t1); |
---|
1446 | return(t2); |
---|
1447 | case 36 : |
---|
1448 | case 32 : |
---|
1449 | case 4 : |
---|
1450 | case 0 : |
---|
1451 | case 54 : |
---|
1452 | case 50 : |
---|
1453 | case 22 : |
---|
1454 | case 18 : |
---|
1455 | t1 = bAig_And(manager, rl, lr); |
---|
1456 | t2 = bAig_And(manager, ll, t1); |
---|
1457 | return(t2); |
---|
1458 | case 44 : |
---|
1459 | case 40 : |
---|
1460 | case 12 : |
---|
1461 | case 8 : |
---|
1462 | case 62 : |
---|
1463 | case 58 : |
---|
1464 | case 30 : |
---|
1465 | case 26 : |
---|
1466 | t1 = bAig_And(manager, rl, lr); |
---|
1467 | t2 = bAig_And(manager, bAig_Not(ll), t1); |
---|
1468 | return(t2); |
---|
1469 | case 45 : |
---|
1470 | case 41 : |
---|
1471 | case 13 : |
---|
1472 | case 9 : |
---|
1473 | case 63 : |
---|
1474 | case 59 : |
---|
1475 | case 31 : |
---|
1476 | case 27 : |
---|
1477 | t1 = bAig_And(manager, bAig_Not(ll), bAig_Not(rl)); |
---|
1478 | t2 = bAig_Or(manager, bAig_Not(lr), t1); |
---|
1479 | return(t2); |
---|
1480 | case 39 : |
---|
1481 | case 35 : |
---|
1482 | case 7 : |
---|
1483 | case 3 : |
---|
1484 | case 53 : |
---|
1485 | case 49 : |
---|
1486 | case 21 : |
---|
1487 | case 17 : |
---|
1488 | return(l); |
---|
1489 | case 46 : |
---|
1490 | case 42 : |
---|
1491 | case 14 : |
---|
1492 | case 10 : |
---|
1493 | case 60 : |
---|
1494 | case 56 : |
---|
1495 | case 28 : |
---|
1496 | case 24 : |
---|
1497 | return(r); |
---|
1498 | case 38 : |
---|
1499 | case 34 : |
---|
1500 | case 6 : |
---|
1501 | case 2 : |
---|
1502 | case 52 : |
---|
1503 | case 48 : |
---|
1504 | case 20 : |
---|
1505 | case 16 : |
---|
1506 | return(bAig_Zero); |
---|
1507 | case 47 : |
---|
1508 | case 43 : |
---|
1509 | case 15 : |
---|
1510 | case 11 : |
---|
1511 | case 61 : |
---|
1512 | case 57 : |
---|
1513 | case 29 : |
---|
1514 | case 25 : |
---|
1515 | t1 = bAig_And2(manager, l, r); |
---|
1516 | return(t1); |
---|
1517 | } |
---|
1518 | } |
---|
1519 | else if(caseIndex == 4) { |
---|
1520 | switch(caseSig) { |
---|
1521 | case 22 : |
---|
1522 | case 20 : |
---|
1523 | case 6 : |
---|
1524 | case 4 : |
---|
1525 | case 50 : |
---|
1526 | case 48 : |
---|
1527 | case 34 : |
---|
1528 | case 32 : |
---|
1529 | case 2 : |
---|
1530 | case 16 : |
---|
1531 | case 52 : |
---|
1532 | case 1 : |
---|
1533 | case 8 : |
---|
1534 | case 19 : |
---|
1535 | case 26 : |
---|
1536 | case 37 : |
---|
1537 | case 44 : |
---|
1538 | case 38 : |
---|
1539 | case 55 : |
---|
1540 | case 62 : |
---|
1541 | return(bAig_Zero); |
---|
1542 | case 0 : |
---|
1543 | case 18 : |
---|
1544 | case 36 : |
---|
1545 | case 54 : |
---|
1546 | case 9 : |
---|
1547 | case 27 : |
---|
1548 | case 45 : |
---|
1549 | case 63 : |
---|
1550 | case 5 : |
---|
1551 | case 23 : |
---|
1552 | case 33 : |
---|
1553 | case 51 : |
---|
1554 | case 3 : |
---|
1555 | case 17 : |
---|
1556 | case 49 : |
---|
1557 | case 7 : |
---|
1558 | case 35 : |
---|
1559 | case 21 : |
---|
1560 | case 39 : |
---|
1561 | case 53 : |
---|
1562 | return(l); |
---|
1563 | case 40 : |
---|
1564 | case 58 : |
---|
1565 | case 12 : |
---|
1566 | case 30 : |
---|
1567 | case 24 : |
---|
1568 | case 10 : |
---|
1569 | case 14 : |
---|
1570 | case 56 : |
---|
1571 | case 28 : |
---|
1572 | case 42 : |
---|
1573 | case 60 : |
---|
1574 | case 46 : |
---|
1575 | return(r); |
---|
1576 | case 11 : |
---|
1577 | case 47 : |
---|
1578 | case 25 : |
---|
1579 | case 61 : |
---|
1580 | return(bAig_Not(ll)); |
---|
1581 | case 41 : |
---|
1582 | case 59 : |
---|
1583 | case 13 : |
---|
1584 | case 31 : |
---|
1585 | return(bAig_Not(lr)); |
---|
1586 | case 15 : |
---|
1587 | t1 = bAig_And(manager, ll, bAig_Not(lr)); |
---|
1588 | t2 = bAig_And(manager, bAig_Not(ll), lr); |
---|
1589 | return(bAig_Not(bAig_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
1590 | case 57 : |
---|
1591 | t1 = bAig_And(manager, rl, bAig_Not(rr)); |
---|
1592 | t2 = bAig_And(manager, bAig_Not(rl), rr); |
---|
1593 | return(bAig_Not(bAig_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
1594 | case 29 : |
---|
1595 | t1 = bAig_And(manager, ll, lr); |
---|
1596 | t2 = bAig_And(manager, bAig_Not(ll), bAig_Not(lr)); |
---|
1597 | return((bAig_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
1598 | case 43 : |
---|
1599 | t1 = bAig_And(manager, rl, rr); |
---|
1600 | t2 = bAig_And(manager, bAig_Not(rl), bAig_Not(rr)); |
---|
1601 | return((bAig_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
1602 | } |
---|
1603 | } |
---|
1604 | return(0); |
---|
1605 | } |
---|
1606 | |
---|
1607 | |
---|
1608 | /**Function******************************************************************** |
---|
1609 | |
---|
1610 | Synopsis [Structural hasing for and3] |
---|
1611 | |
---|
1612 | Description [Structural hasing for and3] |
---|
1613 | |
---|
1614 | SideEffects [] |
---|
1615 | |
---|
1616 | SeeAlso [] |
---|
1617 | |
---|
1618 | ******************************************************************************/ |
---|
1619 | bAigEdge_t |
---|
1620 | bAig_And3( |
---|
1621 | bAig_Manager_t *manager, |
---|
1622 | bAigEdge_t l, |
---|
1623 | bAigEdge_t r) |
---|
1624 | { |
---|
1625 | int caseIndex, caseSig; |
---|
1626 | bAigEdge_t rl, rr; |
---|
1627 | |
---|
1628 | rl = leftChild(r); |
---|
1629 | rr = rightChild(r); |
---|
1630 | |
---|
1631 | caseIndex = 0; /* (a)(b c) */ |
---|
1632 | if(bAigCompareNode(l, rl)) { |
---|
1633 | caseIndex = 1; /* (a)(a b) */ |
---|
1634 | } |
---|
1635 | else if(bAigCompareNode(l, rr)) { |
---|
1636 | caseIndex = 2; /* (a)(b a) */ |
---|
1637 | } |
---|
1638 | |
---|
1639 | caseSig = 0; |
---|
1640 | if(bAig_IsInverted(l)) caseSig += 8; |
---|
1641 | if(bAig_IsInverted(rl)) caseSig += 4; |
---|
1642 | if(bAig_IsInverted(rr)) caseSig += 2; |
---|
1643 | if(bAig_IsInverted(r)) caseSig += 1; |
---|
1644 | if(caseIndex == 0) { |
---|
1645 | return(bAig_And2(manager, l, r)); |
---|
1646 | } |
---|
1647 | else if(caseIndex == 1) { |
---|
1648 | switch(caseSig) { |
---|
1649 | case 2 : |
---|
1650 | case 0 : |
---|
1651 | case 14 : |
---|
1652 | case 12 : |
---|
1653 | return(r); |
---|
1654 | case 10 : |
---|
1655 | case 8 : |
---|
1656 | case 6 : |
---|
1657 | case 4 : |
---|
1658 | return(bAig_Zero); |
---|
1659 | case 3 : |
---|
1660 | case 1 : |
---|
1661 | case 15 : |
---|
1662 | case 13 : |
---|
1663 | return(bAig_And(manager, rl, bAig_Not(rr))); |
---|
1664 | case 11 : |
---|
1665 | case 9 : |
---|
1666 | case 7 : |
---|
1667 | case 5 : |
---|
1668 | return(l); |
---|
1669 | } |
---|
1670 | } |
---|
1671 | else if(caseIndex == 2) { |
---|
1672 | switch(caseSig) { |
---|
1673 | case 4 : |
---|
1674 | case 0 : |
---|
1675 | case 14 : |
---|
1676 | case 10 : |
---|
1677 | return(r); |
---|
1678 | case 12 : |
---|
1679 | case 8 : |
---|
1680 | case 6 : |
---|
1681 | case 2 : |
---|
1682 | return(bAig_Zero); |
---|
1683 | case 5 : |
---|
1684 | case 1 : |
---|
1685 | case 15 : |
---|
1686 | case 11 : |
---|
1687 | return(bAig_And(manager, bAig_Not(rl), rr)); |
---|
1688 | case 13 : |
---|
1689 | case 9 : |
---|
1690 | case 7 : |
---|
1691 | case 3 : |
---|
1692 | return(l); |
---|
1693 | } |
---|
1694 | } |
---|
1695 | return(0); |
---|
1696 | } |
---|
1697 | |
---|
1698 | /**Function******************************************************************** |
---|
1699 | |
---|
1700 | Synopsis [Set mask for transitive fanin nodes] |
---|
1701 | |
---|
1702 | Description [Set mask for transitive fanin nodes] |
---|
1703 | |
---|
1704 | SideEffects [] |
---|
1705 | |
---|
1706 | SeeAlso [] |
---|
1707 | |
---|
1708 | ******************************************************************************/ |
---|
1709 | void |
---|
1710 | bAig_SetMaskTransitiveFanin( |
---|
1711 | bAig_Manager_t *manager, |
---|
1712 | int v, |
---|
1713 | unsigned int mask) |
---|
1714 | { |
---|
1715 | if(v == 2) return; |
---|
1716 | |
---|
1717 | |
---|
1718 | if(flags(v) & mask) return; |
---|
1719 | |
---|
1720 | flags(v) |= mask; |
---|
1721 | |
---|
1722 | bAig_SetMaskTransitiveFanin(manager, leftChild(v), mask); |
---|
1723 | bAig_SetMaskTransitiveFanin(manager, rightChild(v), mask); |
---|
1724 | } |
---|
1725 | |
---|
1726 | /**Function******************************************************************** |
---|
1727 | |
---|
1728 | Synopsis [Reset mask for transitive fanin nodes] |
---|
1729 | |
---|
1730 | Description [Reset mask for transitive fanin nodes] |
---|
1731 | |
---|
1732 | SideEffects [] |
---|
1733 | |
---|
1734 | SeeAlso [] |
---|
1735 | |
---|
1736 | ******************************************************************************/ |
---|
1737 | void |
---|
1738 | bAig_ResetMaskTransitiveFanin( |
---|
1739 | bAig_Manager_t *manager, |
---|
1740 | int v, |
---|
1741 | unsigned int mask, |
---|
1742 | unsigned int resetMask) |
---|
1743 | { |
---|
1744 | if(v == 2) return; |
---|
1745 | |
---|
1746 | |
---|
1747 | if(!(flags(v) & mask)) return; |
---|
1748 | |
---|
1749 | flags(v) &= resetMask; |
---|
1750 | bAig_ResetMaskTransitiveFanin(manager, leftChild(v), mask, resetMask); |
---|
1751 | bAig_ResetMaskTransitiveFanin(manager, rightChild(v), mask, resetMask); |
---|
1752 | } |
---|
1753 | |
---|
1754 | |
---|
1755 | /**Function******************************************************************** |
---|
1756 | |
---|
1757 | Synopsis [Get value of aig node.] |
---|
1758 | |
---|
1759 | Description [The default falue is 2, which is same as UNKNOWN. This value can be assigned from SAT solver.] |
---|
1760 | |
---|
1761 | SideEffects [] |
---|
1762 | |
---|
1763 | SeeAlso [] |
---|
1764 | |
---|
1765 | ******************************************************************************/ |
---|
1766 | |
---|
1767 | int |
---|
1768 | bAig_GetValueOfNode(bAig_Manager_t *manager, bAigEdge_t v) |
---|
1769 | { |
---|
1770 | unsigned int value, lvalue, rvalue; |
---|
1771 | bAigEdge_t left, right; |
---|
1772 | |
---|
1773 | |
---|
1774 | /* |
---|
1775 | if(!(flags(v) & CoiMask)) return(2); |
---|
1776 | **/ |
---|
1777 | if(v == 2) return(2); |
---|
1778 | |
---|
1779 | value = aig_value(v); |
---|
1780 | if(value == 3) return(2); |
---|
1781 | if(value == 2) { |
---|
1782 | left = bAig_GetCanonical(manager, leftChild(v)); |
---|
1783 | lvalue = bAig_GetValueOfNode(manager, left); |
---|
1784 | if(lvalue == 0) { |
---|
1785 | value = 0; |
---|
1786 | } |
---|
1787 | else { |
---|
1788 | right = bAig_GetCanonical(manager, rightChild(v)); |
---|
1789 | rvalue = bAig_GetValueOfNode(manager, right); |
---|
1790 | if(rvalue == 0) { |
---|
1791 | value = 0; |
---|
1792 | } |
---|
1793 | else if(rvalue == 1 && lvalue == 1) { |
---|
1794 | value = 1; |
---|
1795 | } |
---|
1796 | else { |
---|
1797 | value = 2; |
---|
1798 | } |
---|
1799 | } |
---|
1800 | } |
---|
1801 | |
---|
1802 | if(value == 2) { |
---|
1803 | aig_value(v) = 3; |
---|
1804 | return(value); |
---|
1805 | } |
---|
1806 | else { |
---|
1807 | aig_value(v) = value; |
---|
1808 | return(value ^ bAig_IsInverted(v)); |
---|
1809 | } |
---|
1810 | } |
---|
1811 | |
---|