| [14] | 1 | /**CFile*********************************************************************** |
|---|
| 2 | |
|---|
| 3 | FileName [partFine.c] |
|---|
| 4 | |
|---|
| 5 | PackageName [part] |
|---|
| 6 | |
|---|
| 7 | Synopsis [Implements the partition of the network with respect to a |
|---|
| 8 | list of nodes provided by the user.] |
|---|
| 9 | |
|---|
| 10 | Description [The network is composed of an arbitrary set of nodes, each of |
|---|
| 11 | them implementing some function. This partitioning method will produce a |
|---|
| 12 | graph representing the network in which the nodes specified in a list will be |
|---|
| 13 | preserved in the graph structure. Different heuristics will control the |
|---|
| 14 | structure of the rest of the partition.] |
|---|
| 15 | |
|---|
| 16 | SeeAlso [partInOut.c partTotal.c] |
|---|
| 17 | |
|---|
| 18 | Author [HoonSang Jin] |
|---|
| 19 | |
|---|
| 20 | Copyright [This file was created at the University of Colorado at |
|---|
| 21 | Boulder. The University of Colorado at Boulder makes no warranty |
|---|
| 22 | about the suitability of this software for any purpose. It is |
|---|
| 23 | presented on an AS IS basis.] |
|---|
| 24 | |
|---|
| 25 | ******************************************************************************/ |
|---|
| 26 | |
|---|
| 27 | #include "partInt.h" |
|---|
| 28 | |
|---|
| 29 | static char rcsid[] UNUSED = "$Id: partFine.c,v 1.5 2005/04/30 04:00:38 fabio Exp $"; |
|---|
| 30 | |
|---|
| 31 | /*---------------------------------------------------------------------------*/ |
|---|
| 32 | /* Constant declarations */ |
|---|
| 33 | /*---------------------------------------------------------------------------*/ |
|---|
| 34 | |
|---|
| 35 | |
|---|
| 36 | /*---------------------------------------------------------------------------*/ |
|---|
| 37 | /* Structure declarations */ |
|---|
| 38 | /*---------------------------------------------------------------------------*/ |
|---|
| 39 | |
|---|
| 40 | |
|---|
| 41 | /*---------------------------------------------------------------------------*/ |
|---|
| 42 | /* Type declarations */ |
|---|
| 43 | /*---------------------------------------------------------------------------*/ |
|---|
| 44 | |
|---|
| 45 | |
|---|
| 46 | /*---------------------------------------------------------------------------*/ |
|---|
| 47 | /* Variable declarations */ |
|---|
| 48 | /*---------------------------------------------------------------------------*/ |
|---|
| 49 | |
|---|
| 50 | |
|---|
| 51 | /*---------------------------------------------------------------------------*/ |
|---|
| 52 | /* Macro declarations */ |
|---|
| 53 | /*---------------------------------------------------------------------------*/ |
|---|
| 54 | |
|---|
| 55 | #define PartVertexReadGeneric(vPtr) ((PartVertexInfo_t *)(vPtr)->user_data)->generic |
|---|
| 56 | #define PartVertexReadGeneric1(vPtr) ((PartVertexInfo_t *)(vPtr)->user_data)->generic1 |
|---|
| 57 | #define BASIC_PARTITION_UNIT 15 |
|---|
| 58 | |
|---|
| 59 | /**AutomaticStart*************************************************************/ |
|---|
| 60 | |
|---|
| 61 | /*---------------------------------------------------------------------------*/ |
|---|
| 62 | /* Static function prototypes */ |
|---|
| 63 | /*---------------------------------------------------------------------------*/ |
|---|
| 64 | |
|---|
| 65 | static int Part_IsFanoutInverter(Ntk_Node_t *node); |
|---|
| 66 | |
|---|
| 67 | /**AutomaticEnd***************************************************************/ |
|---|
| 68 | |
|---|
| 69 | |
|---|
| 70 | /*---------------------------------------------------------------------------*/ |
|---|
| 71 | /* Definition of exported functions */ |
|---|
| 72 | /*---------------------------------------------------------------------------*/ |
|---|
| 73 | |
|---|
| 74 | |
|---|
| 75 | /*---------------------------------------------------------------------------*/ |
|---|
| 76 | /* Definition of internal functions */ |
|---|
| 77 | /*---------------------------------------------------------------------------*/ |
|---|
| 78 | |
|---|
| 79 | |
|---|
| 80 | /**Function******************************************************************** |
|---|
| 81 | |
|---|
| 82 | Synopsis [Implements the partition with respect to the given list of |
|---|
| 83 | nodes.] |
|---|
| 84 | |
|---|
| 85 | Description [] |
|---|
| 86 | |
|---|
| 87 | SideEffects [] |
|---|
| 88 | |
|---|
| 89 | SeeAlso [PartPartitionTotal PartPartitionInputsOutputs] |
|---|
| 90 | |
|---|
| 91 | ******************************************************************************/ |
|---|
| 92 | void |
|---|
| 93 | PartPartitionFineGrain( |
|---|
| 94 | Ntk_Network_t *network, |
|---|
| 95 | graph_t *partition, |
|---|
| 96 | mdd_t *careSet) |
|---|
| 97 | { |
|---|
| 98 | Ntk_Node_t *node; /* Pointer to iterate over nodes */ |
|---|
| 99 | Mvf_Function_t *mddFunction; /* Pointer to a MDD */ |
|---|
| 100 | mdd_manager *manager; /* Mdd manager in the partition */ |
|---|
| 101 | st_table *tableOfLeaves; /* To store the leaves of the graph */ |
|---|
| 102 | st_table *mddIdToNodeName; /* For quick lookup of node's name */ |
|---|
| 103 | array_t *arrayOfMvf; /* To store the next state functions */ |
|---|
| 104 | array_t *arrayOfRoots; /* To store the roots of the graph */ |
|---|
| 105 | lsList sinkList; /* Vertices representing comb. outputs */ |
|---|
| 106 | lsGen gen; /* To iterate over lists */ |
|---|
| 107 | vertex_t *toVertex; /* Will hold the current function vertex */ |
|---|
| 108 | int i; /* Index for loops */ |
|---|
| 109 | long mddId; /* Will hold the mddId being processed */ |
|---|
| 110 | st_table *mddSupport; /* To store the support of the Mvf_Function */ |
|---|
| 111 | st_generator *stGen; /* To iterate over the MddIds of the support */ |
|---|
| 112 | vertex_t *fromVertex; /* Will hold the current vertex in the support */ |
|---|
| 113 | array_t *singletonMvfArray; |
|---|
| 114 | array_t *singletonArrayOfRoots; |
|---|
| 115 | array_t *tmpArrayOfMvf; |
|---|
| 116 | Mvf_Function_t *nodeMvf; |
|---|
| 117 | lsList sortedListOfNodes; |
|---|
| 118 | array_t *sortedArrayOfPartitionNodes; |
|---|
| 119 | array_t *unsortedArrayOfPartitionNodes; |
|---|
| 120 | st_table *tableOfPartitionNodes; |
|---|
| 121 | Ntk_Node_t *fanin, *fanout; |
|---|
| 122 | |
|---|
| 123 | manager = PartPartitionReadMddManager(partition); |
|---|
| 124 | |
|---|
| 125 | /* Make the combinational input nodes into leaves */ |
|---|
| 126 | tableOfLeaves = st_init_table(st_ptrcmp, st_ptrhash); |
|---|
| 127 | mddIdToNodeName = st_init_table(st_numcmp, st_numhash); |
|---|
| 128 | Ntk_NetworkForEachCombInput(network, gen, node) { |
|---|
| 129 | if(Ntk_NodeReadMddId(node) == NTK_UNASSIGNED_MDD_ID) |
|---|
| 130 | Ord_NetworkAssignMddIdForNode(network, node); |
|---|
| 131 | st_insert(tableOfLeaves, (char *)node, (char *) (long) (-1) ); |
|---|
| 132 | st_insert(mddIdToNodeName, (char *) (long)Ntk_NodeReadMddId(node), |
|---|
| 133 | Ntk_NodeReadName(node)); |
|---|
| 134 | } |
|---|
| 135 | |
|---|
| 136 | unsortedArrayOfPartitionNodes = array_alloc(Ntk_Node_t *, 0); |
|---|
| 137 | tableOfPartitionNodes = st_init_table(st_ptrcmp, st_ptrhash); |
|---|
| 138 | /* Make the target node list for partition */ |
|---|
| 139 | Ntk_NetworkForEachNode(network, gen, node) { |
|---|
| 140 | if(Ntk_NodeTestIsShadow(node)) continue; |
|---|
| 141 | else if(Ntk_NodeTestIsCombInput(node)) continue; |
|---|
| 142 | else if(Ntk_NodeTestIsCombOutput(node)) continue; |
|---|
| 143 | else if(Ntk_NodeReadNumFanouts(node) == 1) { |
|---|
| 144 | fanout = Part_GetFanoutFreeLogic(node); |
|---|
| 145 | if(Ntk_NodeTestIsCombOutput(fanout)); |
|---|
| 146 | else if(Ntk_NodeReadNumFanins(node) > 10); |
|---|
| 147 | else if(Ntk_NodeReadNumFanins(fanout) == 1) continue; |
|---|
| 148 | else if(!Part_CheckLeafNodeCondition(node, tableOfPartitionNodes, 5, 10)) { |
|---|
| 149 | if(Ntk_NodeReadNumFanins(node) == 1) { |
|---|
| 150 | fanin = Part_GetFaninFreeLogic(node); |
|---|
| 151 | if(!fanin) continue; |
|---|
| 152 | if(Ntk_NodeTestIsCombInput(fanin)) continue; |
|---|
| 153 | } |
|---|
| 154 | continue; |
|---|
| 155 | } |
|---|
| 156 | /** |
|---|
| 157 | if(Part_IsFanoutInverter(node)) continue; |
|---|
| 158 | if(Ntk_NodeReadNumFanins(node) == 1) continue; |
|---|
| 159 | **/ |
|---|
| 160 | } |
|---|
| 161 | /** |
|---|
| 162 | else if(Ntk_NodeReadNumFanins(node) == 1) { |
|---|
| 163 | fanin = Part_GetFaninFreeLogic(node); |
|---|
| 164 | if(!fanin) continue; |
|---|
| 165 | if(Ntk_NodeTestIsCombInput(fanin)) continue; |
|---|
| 166 | } |
|---|
| 167 | **/ |
|---|
| 168 | |
|---|
| 169 | array_insert_last(Ntk_Node_t *, unsortedArrayOfPartitionNodes, node); |
|---|
| 170 | st_insert(tableOfPartitionNodes, (char *) node, (char *) (long) (-1)); |
|---|
| 171 | } |
|---|
| 172 | |
|---|
| 173 | /* create sorted array of partition nodes */ |
|---|
| 174 | sortedListOfNodes = Ntk_NetworkComputeTopologicalOrder(network, |
|---|
| 175 | unsortedArrayOfPartitionNodes, tableOfLeaves); |
|---|
| 176 | |
|---|
| 177 | sortedArrayOfPartitionNodes = array_alloc(Ntk_Node_t *, 0); |
|---|
| 178 | lsForEachItem(sortedListOfNodes, gen, node){ |
|---|
| 179 | /* sortedListOfNodes includes many internal nodes, need to filter them out */ |
|---|
| 180 | if(st_is_member(tableOfPartitionNodes, (char *) node)){ |
|---|
| 181 | array_insert_last(Ntk_Node_t *, sortedArrayOfPartitionNodes, node); |
|---|
| 182 | if(Ntk_NodeReadMddId(node) == NTK_UNASSIGNED_MDD_ID) |
|---|
| 183 | Ord_NetworkAssignMddIdForNode(network, node); |
|---|
| 184 | } |
|---|
| 185 | } |
|---|
| 186 | array_free(unsortedArrayOfPartitionNodes); |
|---|
| 187 | lsDestroy(sortedListOfNodes, (void (*)(lsGeneric))0); |
|---|
| 188 | st_free_table(tableOfPartitionNodes); |
|---|
| 189 | |
|---|
| 190 | |
|---|
| 191 | tmpArrayOfMvf = array_alloc(Mvf_Function_t *, 0); |
|---|
| 192 | for(i=0; i < array_n(sortedArrayOfPartitionNodes); i++){ |
|---|
| 193 | node = array_fetch(Ntk_Node_t *, sortedArrayOfPartitionNodes, i); |
|---|
| 194 | singletonArrayOfRoots = array_alloc(Ntk_Node_t *, 0); |
|---|
| 195 | array_insert_last(Ntk_Node_t *, singletonArrayOfRoots, node); |
|---|
| 196 | singletonMvfArray = Ntm_NetworkBuildMvfs(network, singletonArrayOfRoots, |
|---|
| 197 | tableOfLeaves, careSet); |
|---|
| 198 | nodeMvf = array_fetch(Mvf_Function_t *, singletonMvfArray, 0); |
|---|
| 199 | array_insert_last(Mvf_Function_t *, tmpArrayOfMvf, nodeMvf); |
|---|
| 200 | array_free(singletonMvfArray); |
|---|
| 201 | array_free(singletonArrayOfRoots); |
|---|
| 202 | |
|---|
| 203 | if(Ntk_NodeReadMddId(node) == NTK_UNASSIGNED_MDD_ID){ |
|---|
| 204 | Ord_NetworkAssignMddIdForNode(network, node); |
|---|
| 205 | } |
|---|
| 206 | st_insert(tableOfLeaves, (char *)node, (char *) (long) (-1) ); |
|---|
| 207 | st_insert(mddIdToNodeName, (char *) (long)Ntk_NodeReadMddId(node), |
|---|
| 208 | Ntk_NodeReadName(node)); |
|---|
| 209 | |
|---|
| 210 | } |
|---|
| 211 | |
|---|
| 212 | |
|---|
| 213 | arrayOfRoots = array_alloc(Ntk_Node_t *, 0); |
|---|
| 214 | Ntk_NetworkForEachCombOutput(network, gen, node) { |
|---|
| 215 | array_insert_last(Ntk_Node_t *, arrayOfRoots, node); |
|---|
| 216 | } |
|---|
| 217 | arrayOfMvf = Ntm_NetworkBuildMvfs(network, arrayOfRoots, tableOfLeaves, |
|---|
| 218 | careSet); |
|---|
| 219 | |
|---|
| 220 | array_append(arrayOfRoots, sortedArrayOfPartitionNodes); |
|---|
| 221 | array_append(arrayOfMvf, tmpArrayOfMvf); |
|---|
| 222 | array_free(sortedArrayOfPartitionNodes); |
|---|
| 223 | array_free(tmpArrayOfMvf); |
|---|
| 224 | |
|---|
| 225 | |
|---|
| 226 | /* Create one vertex for every component of arrayOfMvf */ |
|---|
| 227 | for (i=0; i < array_n(arrayOfRoots); i++) { |
|---|
| 228 | node = array_fetch(Ntk_Node_t *, arrayOfRoots, i); |
|---|
| 229 | mddId = Ntk_NodeReadMddId(node); |
|---|
| 230 | |
|---|
| 231 | /* obtain the function attached to the node */ |
|---|
| 232 | mddFunction = array_fetch(Mvf_Function_t *, arrayOfMvf, i); |
|---|
| 233 | |
|---|
| 234 | |
|---|
| 235 | toVertex = g_add_vertex(partition); |
|---|
| 236 | |
|---|
| 237 | /* Update the look-up tables in the graph */ |
|---|
| 238 | st_insert(PartPartitionReadNameToVertex(partition), |
|---|
| 239 | Ntk_NodeReadName(node), (char *)toVertex); |
|---|
| 240 | if (mddId != -1) { |
|---|
| 241 | st_insert(PartPartitionReadMddIdToVertex(partition), |
|---|
| 242 | (char *)(long) mddId, (char *)toVertex); |
|---|
| 243 | } |
|---|
| 244 | toVertex->user_data = |
|---|
| 245 | (gGeneric)PartVertexInfoCreateSingle(Ntk_NodeReadName(node), |
|---|
| 246 | mddFunction, |
|---|
| 247 | mddId); |
|---|
| 248 | } |
|---|
| 249 | |
|---|
| 250 | /* Read the list of vertices on the graph */ |
|---|
| 251 | sinkList = lsCopy(g_get_vertices(partition), (lsGeneric (*)(lsGeneric))0); |
|---|
| 252 | |
|---|
| 253 | /* |
|---|
| 254 | * For every function on every combinational output, compute the |
|---|
| 255 | * support and create vertices in the graph when needed |
|---|
| 256 | */ |
|---|
| 257 | lsForEachItem(sinkList, gen, toVertex) { |
|---|
| 258 | mddFunction = PartVertexReadFunction(toVertex); |
|---|
| 259 | mddSupport = PartCreateFunctionSupportTable(mddFunction); |
|---|
| 260 | |
|---|
| 261 | /* |
|---|
| 262 | * Create one edge (and one vertex if necessary) for every element |
|---|
| 263 | * in mddSupport |
|---|
| 264 | */ |
|---|
| 265 | st_foreach_item(mddSupport, stGen, &mddId, NULL) { |
|---|
| 266 | char *name; |
|---|
| 267 | |
|---|
| 268 | /* Create vertex with the information if needed */ |
|---|
| 269 | if (st_lookup(PartPartitionReadMddIdToVertex(partition), |
|---|
| 270 | (char *)(long) mddId, &fromVertex) == 0) { |
|---|
| 271 | fromVertex = g_add_vertex(partition); |
|---|
| 272 | |
|---|
| 273 | st_lookup(mddIdToNodeName, (char *)(long) mddId, &name); |
|---|
| 274 | |
|---|
| 275 | /* Update the look-up tables in the graph */ |
|---|
| 276 | st_insert(PartPartitionReadNameToVertex(partition), |
|---|
| 277 | name, (char *)fromVertex); |
|---|
| 278 | st_insert(PartPartitionReadMddIdToVertex(partition), |
|---|
| 279 | (char *)(long) mddId, (char *)fromVertex); |
|---|
| 280 | |
|---|
| 281 | /* Create vertex data */ |
|---|
| 282 | fromVertex->user_data = |
|---|
| 283 | (gGeneric)PartVertexInfoCreateSingle(name, |
|---|
| 284 | Mvf_FunctionCreateFromVariable(manager,mddId), |
|---|
| 285 | mddId); |
|---|
| 286 | } |
|---|
| 287 | |
|---|
| 288 | /* |
|---|
| 289 | * Add the edge to the graph. Make sure a self loop is not added. The |
|---|
| 290 | * self loop may be produced by a mdd that has in its support the same |
|---|
| 291 | * variables that represent the mddId of the node. |
|---|
| 292 | */ |
|---|
| 293 | if (fromVertex != toVertex) { |
|---|
| 294 | g_add_edge(fromVertex, toVertex); |
|---|
| 295 | } /* End of if */ |
|---|
| 296 | |
|---|
| 297 | } /* End of st_foreach_item */ |
|---|
| 298 | |
|---|
| 299 | /* Clean the support table */ |
|---|
| 300 | st_free_table(mddSupport); |
|---|
| 301 | } /* End of lsForEachItem */ |
|---|
| 302 | |
|---|
| 303 | /* Clean up */ |
|---|
| 304 | st_free_table(mddIdToNodeName); |
|---|
| 305 | st_free_table(tableOfLeaves); |
|---|
| 306 | array_free(arrayOfRoots); |
|---|
| 307 | lsDestroy(sinkList, (void (*)(lsGeneric))0); |
|---|
| 308 | /* |
|---|
| 309 | * The contents of this array (array of mdds) is not deallocated because the |
|---|
| 310 | * information has been transferred to the partition structure. All the |
|---|
| 311 | * functions are stored now as part of the vertex information. |
|---|
| 312 | */ |
|---|
| 313 | array_free(arrayOfMvf); |
|---|
| 314 | fprintf(stdout, "NOTICE : current peak memory = %ld\n", |
|---|
| 315 | bdd_read_peak_memory(manager)); |
|---|
| 316 | |
|---|
| 317 | } /* End of PartPartitionCut */ |
|---|
| 318 | |
|---|
| 319 | |
|---|
| 320 | /**Function******************************************************************** |
|---|
| 321 | |
|---|
| 322 | Synopsis [Check if the fanout of given node is inverter.] |
|---|
| 323 | |
|---|
| 324 | Description [ Check if the fanout of given node is inverter.] |
|---|
| 325 | |
|---|
| 326 | SideEffects [] |
|---|
| 327 | |
|---|
| 328 | SeeAlso [PartPartitionTotal PartPartitionInputsOutputs] |
|---|
| 329 | |
|---|
| 330 | ******************************************************************************/ |
|---|
| 331 | int |
|---|
| 332 | Part_IsFanoutInverter(Ntk_Node_t *node) |
|---|
| 333 | { |
|---|
| 334 | Ntk_Node_t *fanout; |
|---|
| 335 | |
|---|
| 336 | fanout = Part_GetFanoutFreeLogic(node); |
|---|
| 337 | if(!fanout) return(1); |
|---|
| 338 | if(Ntk_NodeReadNumFanins(fanout) == 1) return(1); |
|---|
| 339 | else return(0); |
|---|
| 340 | |
|---|
| 341 | } |
|---|
| 342 | |
|---|
| 343 | /**Function******************************************************************** |
|---|
| 344 | |
|---|
| 345 | Synopsis [Check if the node can be assumed as leaf node based on given threshold.] |
|---|
| 346 | |
|---|
| 347 | Description [ This function identify the leaf node for fine grain partition based on threshold.] |
|---|
| 348 | |
|---|
| 349 | SideEffects [] |
|---|
| 350 | |
|---|
| 351 | SeeAlso [PartPartitionTotal PartPartitionInputsOutputs] |
|---|
| 352 | |
|---|
| 353 | ******************************************************************************/ |
|---|
| 354 | int |
|---|
| 355 | Part_CheckLeafNodeCondition(Ntk_Node_t *node, |
|---|
| 356 | st_table *leafTable, |
|---|
| 357 | int fanoutFreeLimit, |
|---|
| 358 | int numVariableLimit) |
|---|
| 359 | { |
|---|
| 360 | int nVar, nDepth, i; |
|---|
| 361 | Ntk_Node_t *fanout, *tnode, *tfanin; |
|---|
| 362 | st_table *ownTable; |
|---|
| 363 | |
|---|
| 364 | |
|---|
| 365 | nVar = Ntk_NodeReadNumFanins(node); |
|---|
| 366 | nDepth = 0; |
|---|
| 367 | fanout = node; |
|---|
| 368 | ownTable = st_init_table(st_ptrcmp, st_ptrhash); |
|---|
| 369 | while(1) { |
|---|
| 370 | if(nDepth > fanoutFreeLimit)return(1); |
|---|
| 371 | if(nVar > numVariableLimit) return(1); |
|---|
| 372 | |
|---|
| 373 | if(!st_lookup(leafTable, fanout, &tnode)) { |
|---|
| 374 | fanout = Part_GetFanoutFreeLogic(fanout); |
|---|
| 375 | if(fanout == 0) break; |
|---|
| 376 | if(Ntk_NodeTestIsCombInput(fanout)) break; |
|---|
| 377 | if(Ntk_NodeTestIsCombOutput(fanout)) break; |
|---|
| 378 | } |
|---|
| 379 | else break; |
|---|
| 380 | nDepth++; |
|---|
| 381 | if(fanout == 0) break; |
|---|
| 382 | nVar += Img_CutCalcTransitiveFanin(leafTable, ownTable, fanout, |
|---|
| 383 | node, numVariableLimit); |
|---|
| 384 | if(nVar > numVariableLimit) { |
|---|
| 385 | st_free_table(ownTable); |
|---|
| 386 | return(1); |
|---|
| 387 | } |
|---|
| 388 | } |
|---|
| 389 | |
|---|
| 390 | Ntk_NodeForEachFanin(node, i, tfanin) { |
|---|
| 391 | if(tfanin == 0) continue; |
|---|
| 392 | if(Ntk_NodeReadNumFanouts(tfanin) != 1) continue; |
|---|
| 393 | nVar += Img_CutCalcTransitiveFanin(leafTable, ownTable, tfanin, 0, numVariableLimit)-1; |
|---|
| 394 | if(nVar > numVariableLimit) { |
|---|
| 395 | st_free_table(ownTable); |
|---|
| 396 | return(1); |
|---|
| 397 | } |
|---|
| 398 | } |
|---|
| 399 | if(nVar > numVariableLimit) { |
|---|
| 400 | st_free_table(ownTable); |
|---|
| 401 | return(1); |
|---|
| 402 | } |
|---|
| 403 | /** |
|---|
| 404 | fanin = node; |
|---|
| 405 | nDepth = 0; |
|---|
| 406 | while(1) { |
|---|
| 407 | if(nDepth > fanoutFreeLimit)return(1); |
|---|
| 408 | if(nVar > numVariableLimit) return(1); |
|---|
| 409 | if(!st_lookup(leafTable, (char *)fanin, (char **)&tnode)) { |
|---|
| 410 | |
|---|
| 411 | Ntk_NodeForEachFanin(fanin, i, tfanin) { |
|---|
| 412 | if(tfanin == 0) continue; |
|---|
| 413 | if(Ntk_NodeReadNumFanouts(tfanin) != 1) continue; |
|---|
| 414 | nVar += Ntk_NodeReadNumFanins(tfanin) - 1; |
|---|
| 415 | } |
|---|
| 416 | if(nVar > numVariableLimit) return(1); |
|---|
| 417 | |
|---|
| 418 | fanin = Part_GetFaninFreeLogic(fanin); |
|---|
| 419 | if(fanin == 0) break; |
|---|
| 420 | if(Ntk_NodeTestIsCombInput(fanin)) break; |
|---|
| 421 | if(Ntk_NodeTestIsCombOutput(fanin)) break; |
|---|
| 422 | |
|---|
| 423 | } |
|---|
| 424 | else break; |
|---|
| 425 | nDepth++; |
|---|
| 426 | |
|---|
| 427 | } |
|---|
| 428 | **/ |
|---|
| 429 | return(0); |
|---|
| 430 | } |
|---|
| 431 | |
|---|
| 432 | /**Function******************************************************************** |
|---|
| 433 | |
|---|
| 434 | Synopsis [Compute the number of support variables of given node.] |
|---|
| 435 | |
|---|
| 436 | Description [ Compute the number of support variables of given node.] |
|---|
| 437 | |
|---|
| 438 | SideEffects [] |
|---|
| 439 | |
|---|
| 440 | SeeAlso [PartPartitionTotal PartPartitionInputsOutputs] |
|---|
| 441 | |
|---|
| 442 | ******************************************************************************/ |
|---|
| 443 | int |
|---|
| 444 | Img_CutCalcTransitiveFanin(st_table *table, |
|---|
| 445 | st_table *ownTable, |
|---|
| 446 | Ntk_Node_t *node, |
|---|
| 447 | Ntk_Node_t *fanin, |
|---|
| 448 | int limit) |
|---|
| 449 | { |
|---|
| 450 | int i, nVar; |
|---|
| 451 | Ntk_Node_t *tfanin, *tnode; |
|---|
| 452 | |
|---|
| 453 | nVar = 0; |
|---|
| 454 | Ntk_NodeForEachFanin(node, i, tfanin) { |
|---|
| 455 | if(tfanin == fanin) continue; |
|---|
| 456 | if(tfanin == 0) continue; |
|---|
| 457 | if(Ntk_NodeReadNumFanouts(tfanin) != 1){ |
|---|
| 458 | if(!st_lookup(ownTable, tfanin, &tnode)) { |
|---|
| 459 | st_insert(ownTable, tfanin, tfanin); |
|---|
| 460 | nVar++; |
|---|
| 461 | } |
|---|
| 462 | continue; |
|---|
| 463 | } |
|---|
| 464 | if(Ntk_NodeTestIsCombInput(tfanin)) { |
|---|
| 465 | if(!st_lookup(ownTable, tfanin, &tnode)) { |
|---|
| 466 | st_insert(ownTable, tfanin, tfanin); |
|---|
| 467 | nVar++; |
|---|
| 468 | } |
|---|
| 469 | continue; |
|---|
| 470 | } |
|---|
| 471 | if(Ntk_NodeTestIsCombOutput(tfanin)) { |
|---|
| 472 | if(!st_lookup(ownTable, tfanin, &tnode)) { |
|---|
| 473 | st_insert(ownTable, tfanin, tfanin); |
|---|
| 474 | nVar++; |
|---|
| 475 | } |
|---|
| 476 | continue; |
|---|
| 477 | } |
|---|
| 478 | if(!st_lookup(table, tfanin, &tnode)) { |
|---|
| 479 | nVar += Img_CutCalcTransitiveFanin(table, ownTable, tfanin, 0, limit); |
|---|
| 480 | } |
|---|
| 481 | else |
|---|
| 482 | nVar++; |
|---|
| 483 | if(nVar > limit) return(nVar); |
|---|
| 484 | } |
|---|
| 485 | return(nVar); |
|---|
| 486 | } |
|---|
| 487 | |
|---|
| 488 | /**Function******************************************************************** |
|---|
| 489 | |
|---|
| 490 | Synopsis [Check if the fanin of given node is fanout free.] |
|---|
| 491 | |
|---|
| 492 | Description [Check if the fanin of given node is fanout free.] |
|---|
| 493 | |
|---|
| 494 | SideEffects [] |
|---|
| 495 | |
|---|
| 496 | SeeAlso [PartPartitionTotal PartPartitionInputsOutputs] |
|---|
| 497 | |
|---|
| 498 | ******************************************************************************/ |
|---|
| 499 | Ntk_Node_t * |
|---|
| 500 | Part_GetFaninFreeLogic(Ntk_Node_t *node) |
|---|
| 501 | { |
|---|
| 502 | int i; |
|---|
| 503 | Ntk_Node_t *fanin; |
|---|
| 504 | |
|---|
| 505 | Ntk_NodeForEachFanin(node, i, fanin) { |
|---|
| 506 | if(Ntk_NodeReadNumFanouts(fanin) != 1) continue; |
|---|
| 507 | return(fanin); |
|---|
| 508 | } |
|---|
| 509 | return(0); |
|---|
| 510 | } |
|---|
| 511 | |
|---|
| 512 | /**Function******************************************************************** |
|---|
| 513 | |
|---|
| 514 | Synopsis [Check if the fanout of given node is fanout free.] |
|---|
| 515 | |
|---|
| 516 | Description [Check if the fanout of given node is fanout free.] |
|---|
| 517 | |
|---|
| 518 | SideEffects [] |
|---|
| 519 | |
|---|
| 520 | SeeAlso [PartPartitionTotal PartPartitionInputsOutputs] |
|---|
| 521 | |
|---|
| 522 | ******************************************************************************/ |
|---|
| 523 | Ntk_Node_t * |
|---|
| 524 | Part_GetFanoutFreeLogic(Ntk_Node_t *node) |
|---|
| 525 | { |
|---|
| 526 | int i; |
|---|
| 527 | Ntk_Node_t *fanout; |
|---|
| 528 | |
|---|
| 529 | if(Ntk_NodeReadNumFanouts(node) != 1) return(0); |
|---|
| 530 | Ntk_NodeForEachFanout(node, i, fanout) { |
|---|
| 531 | return(fanout); |
|---|
| 532 | } |
|---|
| 533 | return(0); |
|---|
| 534 | } |
|---|