[14] | 1 | /**CFile*********************************************************************** |
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| 2 | |
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| 3 | FileName [grabGrab.c] |
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| 4 | |
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| 5 | PackageName [grab] |
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| 6 | |
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| 7 | Synopsis [The GRAB algorithm of computing a set of refinement variables.] |
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| 8 | |
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| 9 | Description [The computation is based on all the shortest abstract |
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| 10 | counter-examples.] |
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| 11 | |
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| 12 | Author [Chao Wang] |
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| 13 | |
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| 14 | Copyright [Copyright (c) 2004 The Regents of the Univ. of Colorado. |
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| 15 | All rights reserved. |
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| 16 | |
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| 17 | Permission is hereby granted, without written agreement and without |
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| 18 | license or royalty fees, to use, copy, modify, and distribute this |
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| 19 | software and its documentation for any purpose, provided that the |
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| 20 | above copyright notice and the following two paragraphs appear in |
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| 21 | all copies of this software.] |
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| 22 | |
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| 23 | ******************************************************************************/ |
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| 24 | |
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| 25 | #include "grabInt.h" |
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| 26 | |
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| 27 | |
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| 28 | /*---------------------------------------------------------------------------*/ |
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| 29 | /* Constant declarations */ |
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| 30 | /*---------------------------------------------------------------------------*/ |
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| 31 | |
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| 32 | /*---------------------------------------------------------------------------*/ |
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| 33 | /* Structure declarations */ |
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| 34 | /*---------------------------------------------------------------------------*/ |
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| 35 | |
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| 36 | /*---------------------------------------------------------------------------*/ |
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| 37 | /* Type declarations */ |
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| 38 | /*---------------------------------------------------------------------------*/ |
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| 39 | |
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| 40 | /*---------------------------------------------------------------------------*/ |
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| 41 | /* Variable declarations */ |
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| 42 | /*---------------------------------------------------------------------------*/ |
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| 43 | static st_table *Sel0ScoreTable; |
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| 44 | static st_table *SelScoreTable; |
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| 45 | static st_table *Sel2ScoreTable; |
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| 46 | static st_table *Sel3ScoreTable; |
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| 47 | |
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| 48 | /*---------------------------------------------------------------------------*/ |
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| 49 | /* Macro declarations */ |
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| 50 | /*---------------------------------------------------------------------------*/ |
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| 51 | |
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| 52 | /**AutomaticStart*************************************************************/ |
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| 53 | |
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| 54 | /*---------------------------------------------------------------------------*/ |
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| 55 | /* Static function prototypes */ |
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| 56 | /*---------------------------------------------------------------------------*/ |
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| 57 | |
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| 58 | static array_t * GrabFsmComputeExRings(Fsm_Fsm_t *absFsm, st_table *absVarTable, st_table *absBnvTable, array_t *oldRings, int cexType, int verbose); |
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| 59 | static int GrabCompareScores(const void *ptr1, const void *ptr2); |
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| 60 | static void GrabMddAppendSupports(mdd_manager *mddManager, mdd_t *mdd1, st_table *supportsTable); |
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| 61 | static array_t * ComputeDependence(Ntk_Network_t *network, st_table *vertexTable, array_t *leftVars); |
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| 62 | |
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| 63 | /**AutomaticEnd***************************************************************/ |
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| 64 | |
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| 65 | /*---------------------------------------------------------------------------*/ |
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| 66 | /* Definition of internal functions */ |
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| 67 | /*---------------------------------------------------------------------------*/ |
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| 68 | |
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| 69 | /**Function******************************************************************** |
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| 70 | |
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| 71 | Synopsis [Pick a set of refinement variables using Grab.] |
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| 72 | |
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| 73 | Description [Pick a set of refinement variables using Grab. When |
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| 74 | refine_direction is 1, refine in both directions (by adding latches |
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| 75 | and bnvs); when refine_direction is 0, refine only in the boolean |
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| 76 | direction (by adding bnvs). |
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| 77 | |
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| 78 | The present state variables of absFsm must include all the invisible |
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| 79 | variables; its next state variables must include only the visible |
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| 80 | ones. On such a FSM, the preimage may contain some invisible |
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| 81 | variables in its support. The set of preimages, ExRings, is the set |
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| 82 | of augmented preimages (with invisible variables in the support). |
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| 83 | |
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| 84 | The refinement variable will be put into either addedVars or |
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| 85 | addedBnvs, depending on which class it bolongs to; at the same time, |
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| 86 | it will be put into either absVarTable or |
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| 87 | BnvTable. |
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| 88 | |
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| 89 | nodeToFaninNumber is a global variable, whose values are used as |
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| 90 | tie-breakers.] |
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| 91 | |
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| 92 | SideEffects [] |
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| 93 | |
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| 94 | ******************************************************************************/ |
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| 95 | void |
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| 96 | GrabRefineAbstractionByGrab( |
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| 97 | Fsm_Fsm_t *absFsm, |
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| 98 | array_t *SORs, |
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| 99 | st_table *absVarTable, |
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| 100 | st_table *BnvTable, |
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| 101 | array_t *addedVars, |
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| 102 | array_t *addedBnvs, |
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| 103 | int refine_direction, |
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| 104 | st_table *nodeToFaninNumberTable, |
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| 105 | int verbose) |
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| 106 | { |
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| 107 | Ntk_Network_t *network = Fsm_FsmReadNetwork(absFsm); |
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| 108 | mdd_manager *mddManager = Ntk_NetworkReadMddManager(network); |
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| 109 | array_t *ExRings; |
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| 110 | array_t *visibleVarMddIds, *invisibleVarMddIds, *allPSVars; |
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| 111 | array_t *tempArray; |
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| 112 | mdd_t *mdd1, *mdd2; |
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| 113 | char *nodeName; |
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| 114 | Ntk_Node_t *node; |
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| 115 | double *Scores, *SelScores, *Sel0Scores, *Sel2Scores, *Sel3Scores; |
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| 116 | double epd, baseNum; |
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| 117 | int i, j, nRow, nCol; |
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| 118 | long mddId, value, value0; |
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| 119 | boolean isSupport, isLatch; |
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| 120 | int max_num_of_added_vars; |
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| 121 | |
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| 122 | /* compute the preimages (with invisible vars in their support) |
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| 123 | */ |
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| 124 | ExRings = GrabFsmComputeExRings(absFsm, absVarTable, BnvTable, SORs, |
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| 125 | GRAB_CEX_SOR, verbose); |
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| 126 | assert(ExRings != NIL(array_t)); |
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| 127 | |
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| 128 | visibleVarMddIds = GrabGetVisibleVarMddIds(absFsm,absVarTable); |
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| 129 | invisibleVarMddIds = GrabGetInvisibleVarMddIds(absFsm,absVarTable,BnvTable); |
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| 130 | allPSVars = array_dup(visibleVarMddIds); |
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| 131 | array_append(allPSVars, invisibleVarMddIds); |
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| 132 | assert(array_n(invisibleVarMddIds) > 0 ); |
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| 133 | |
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| 134 | /* Compute the normalized number of "winning positions" for each individual |
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| 135 | * invisibleVar, and store them in 'Scores'! |
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| 136 | */ |
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| 137 | nRow = array_n(ExRings); |
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| 138 | nCol = array_n(invisibleVarMddIds); |
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| 139 | Scores = ALLOC(double, nRow*nCol); |
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| 140 | memset(Scores, 0, sizeof(double)*nRow*nCol); |
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| 141 | |
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| 142 | |
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| 143 | /********************************************************* |
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| 144 | * for each set of abstract states in (mdd1, Ring[j+1] ) |
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| 145 | *********************************************************/ |
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| 146 | arrayForEachItem(mdd_t *, ExRings, j, mdd1) { |
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| 147 | st_table *localSupportsTable = st_init_table(st_numcmp, st_numhash); |
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| 148 | GrabMddAppendSupports(mddManager, mdd1, localSupportsTable); |
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| 149 | |
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| 150 | if (mdd_get_number_of_bdd_vars(mddManager, allPSVars) <= 1023 ) |
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| 151 | baseNum = mdd_count_onset(mddManager, mdd1, allPSVars); |
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| 152 | else { |
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| 153 | mdd_t *stateMdd = mdd_smooth(mddManager, mdd1, invisibleVarMddIds); |
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| 154 | baseNum = mdd_count_onset(mddManager, stateMdd, visibleVarMddIds); |
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| 155 | mdd_free(stateMdd); |
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| 156 | } |
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| 157 | |
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| 158 | /*********************************************************** |
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| 159 | * compute the impact of refining with each invisible var |
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| 160 | ***********************************************************/ |
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| 161 | arrayForEachItem(int, invisibleVarMddIds, i, mddId) { |
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| 162 | /* for debugging purpose. won't affect the algorithm */ |
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| 163 | Scores[j*nCol+i] = -9E-99; |
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| 164 | |
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| 165 | /* give credit simply for the appearance */ |
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| 166 | isSupport = st_is_member(localSupportsTable, (char *)mddId); |
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| 167 | if (!isSupport || baseNum==0.0) continue; |
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| 168 | Scores[j*nCol+i] += 0.001; |
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| 169 | |
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| 170 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 171 | isLatch = (Ntk_NodeTestIsLatch(node)); |
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| 172 | if (refine_direction==0 && isLatch) continue; |
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| 173 | |
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| 174 | { |
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| 175 | array_t *universalQVars = array_alloc(int, 0); |
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| 176 | /* MX */ |
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| 177 | array_insert_last(int, universalQVars, mddId); |
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| 178 | mdd2 = mdd_consensus(mddManager, mdd1, universalQVars); |
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| 179 | array_free(universalQVars); |
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| 180 | |
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| 181 | if (mdd_get_number_of_bdd_vars(mddManager, allPSVars) <= 1023) |
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| 182 | epd = mdd_count_onset(mddManager, mdd2, allPSVars); |
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| 183 | else { |
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| 184 | mdd_t *stateMdd = mdd_smooth(mddManager, mdd2, invisibleVarMddIds); |
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| 185 | epd = mdd_count_onset(mddManager, stateMdd, visibleVarMddIds); |
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| 186 | mdd_free(stateMdd); |
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| 187 | } |
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| 188 | mdd_free(mdd2); |
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| 189 | |
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| 190 | Scores[j*nCol+i] = (baseNum - epd)/baseNum; |
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| 191 | } |
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| 192 | |
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| 193 | if (j == 0) |
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| 194 | Scores[j*nCol+i] /= 10.0; |
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| 195 | |
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| 196 | } |
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| 197 | st_free_table(localSupportsTable); |
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| 198 | } |
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| 199 | |
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| 200 | /* For each column, sum up the score over all the rows. The |
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| 201 | * selection of refinement variables will be based mainly on these |
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| 202 | * scores. |
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| 203 | */ |
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| 204 | SelScores = ALLOC(double, nCol); |
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| 205 | memset(SelScores, 0, sizeof(double)*nCol); |
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| 206 | for (i=0; i<nRow; i++) { |
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| 207 | for (j=0; j<nCol; j++) { |
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| 208 | SelScores[j] += Scores[i*nCol+j]; |
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| 209 | } |
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| 210 | } |
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| 211 | |
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| 212 | /* Other selection criteria: |
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| 213 | * (0) when in the BOOLEAN refinement direction, only add bnvs |
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| 214 | * (2) how many absLatches depending on the invisible var? |
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| 215 | * (3) how much will the invisible var cost? |
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| 216 | */ |
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| 217 | Sel0Scores = ALLOC(double, nCol); |
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| 218 | Sel2Scores = ALLOC(double, nCol); |
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| 219 | Sel3Scores = ALLOC(double, nCol); |
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| 220 | tempArray = ComputeDependence(network, absVarTable, invisibleVarMddIds); |
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| 221 | value0 = lsLength(Ntk_NetworkReadNodes(network)); |
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| 222 | for (j=0; j<nCol; j++) { |
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| 223 | mddId = array_fetch(int, invisibleVarMddIds, j); |
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| 224 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 225 | isLatch = (Ntk_NodeTestIsLatch(node)); |
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| 226 | /* when refinement is in the BOOLEAN direction, only add bnvs |
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| 227 | * otherwise, add either latches or bnvs |
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| 228 | */ |
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| 229 | if (refine_direction==0 && !isLatch) |
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| 230 | Sel0Scores[j] = 1.0; |
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| 231 | else |
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| 232 | Sel0Scores[j] = 0.0; |
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| 233 | /* dependence */ |
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| 234 | value = array_fetch(int, tempArray, j); |
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| 235 | Sel2Scores[j] = ((double)value)/st_count(absVarTable); |
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| 236 | /* cost */ |
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| 237 | value = GrabNodeComputeFaninNumberTableItem(network, |
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| 238 | nodeToFaninNumberTable, |
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| 239 | node); |
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| 240 | Sel3Scores[j] = 1.0 - ((double)value)/value0; |
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| 241 | } |
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| 242 | array_free(tempArray); |
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| 243 | |
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| 244 | /* Print out the 'Scores' matrix when requested |
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| 245 | */ |
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| 246 | if (verbose >= 5) { |
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| 247 | /* the entire score table */ |
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| 248 | fprintf(vis_stdout, "\n Scores[%d][%d] = \n", nRow, nCol); |
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| 249 | arrayForEachItem(int, invisibleVarMddIds, i, mddId) { |
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| 250 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 251 | fprintf(vis_stdout, "%s ", (Ntk_NodeTestIsLatch(node)?" L ":" ")); |
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| 252 | } |
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| 253 | fprintf(vis_stdout, "\n"); |
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| 254 | arrayForEachItem(int, invisibleVarMddIds, i, mddId) { |
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| 255 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 256 | fprintf(vis_stdout, "%5d ", i); |
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| 257 | } |
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| 258 | fprintf(vis_stdout, "\n"); |
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| 259 | for (i=0; i<nRow; i++) { |
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| 260 | for (j=0; j<nCol; j++) { |
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| 261 | fprintf(vis_stdout, "%+1.2f ", Scores[i*nCol+j]); |
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| 262 | } |
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| 263 | fprintf(vis_stdout, "\n"); |
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| 264 | } |
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| 265 | /* best score in each row */ |
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| 266 | for (i=0; i<nRow; i++) { |
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| 267 | int best_local = 0; |
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| 268 | for (j=0; j<nCol; j++) { |
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| 269 | if (Scores[i*nCol+best_local] < Scores[i*nCol+j]) |
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| 270 | best_local = j; |
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| 271 | } |
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| 272 | fprintf(vis_stdout, "best_local: Scores[%d][%d] = %5g\n", |
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| 273 | i, best_local, Scores[i*nCol+best_local]); |
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| 274 | } |
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| 275 | } |
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| 276 | |
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| 277 | /* Sorting the invisibleVarMddIds according to the Selection Scores |
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| 278 | */ |
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| 279 | Sel0ScoreTable = st_init_table(st_numcmp, st_numhash); |
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| 280 | SelScoreTable = st_init_table(st_numcmp, st_numhash); |
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| 281 | Sel2ScoreTable = st_init_table(st_numcmp, st_numhash); |
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| 282 | Sel3ScoreTable = st_init_table(st_numcmp, st_numhash); |
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| 283 | arrayForEachItem(int, invisibleVarMddIds, j, mddId) { |
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| 284 | st_insert(Sel0ScoreTable, (char *)mddId, (char *)(Sel0Scores+j)); |
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| 285 | st_insert(SelScoreTable, (char *)mddId, (char *)(SelScores+j)); |
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| 286 | st_insert(Sel2ScoreTable, (char *)mddId, (char *)(Sel2Scores+j)); |
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| 287 | st_insert(Sel3ScoreTable, (char *)mddId, (char *)(Sel3Scores+j)); |
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| 288 | } |
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| 289 | |
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| 290 | array_sort(invisibleVarMddIds, GrabCompareScores); |
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| 291 | |
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| 292 | if (verbose >= 4) { |
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| 293 | fprintf(vis_stdout, " \t Sel0 Sel Sel2 Sel3\n"); |
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| 294 | arrayForEachItem(int, invisibleVarMddIds, j, mddId) { |
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| 295 | double *addr; |
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| 296 | st_lookup(Sel0ScoreTable, (char *)mddId, &addr); |
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| 297 | i = (int)(addr-Sel0Scores); |
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| 298 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 299 | isLatch = (Ntk_NodeTestIsLatch(node)); |
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| 300 | fprintf(vis_stdout, |
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| 301 | "%s[%d]\t %+1.3f %+1.3f %+1.3f %+1.3f %s\n", |
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| 302 | (isLatch? "L":" "), |
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| 303 | i, |
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| 304 | Sel0Scores[i], SelScores[i], Sel2Scores[i], Sel3Scores[i], |
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| 305 | Ntk_NodeReadName(node) |
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| 306 | ); |
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| 307 | /* only output the top 20 variables */ |
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| 308 | if (j >= 19) break; |
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| 309 | } |
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| 310 | } |
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| 311 | |
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| 312 | st_free_table(Sel0ScoreTable); |
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| 313 | st_free_table(SelScoreTable); |
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| 314 | st_free_table(Sel2ScoreTable); |
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| 315 | st_free_table(Sel3ScoreTable); |
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| 316 | |
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| 317 | /* Now find the best (largest score) invisible Var */ |
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| 318 | { |
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| 319 | int num_absBnvs = BnvTable? st_count(BnvTable):0; |
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| 320 | |
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| 321 | if ((st_count(absVarTable) + num_absBnvs) < 10) |
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| 322 | max_num_of_added_vars = 1; |
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| 323 | else |
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| 324 | max_num_of_added_vars = 2 + (st_count(absVarTable)+num_absBnvs)/30; |
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| 325 | } |
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| 326 | |
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| 327 | arrayForEachItem(int, invisibleVarMddIds, j, mddId) { |
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| 328 | |
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| 329 | if (j >= max_num_of_added_vars) break; |
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| 330 | |
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| 331 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 332 | nodeName = Ntk_NodeReadName(node); |
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| 333 | if (Ntk_NodeTestIsLatch(node)) { |
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| 334 | assert(!st_is_member(absVarTable, node)); |
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| 335 | st_insert(absVarTable, node, (char *)(long)st_count(absVarTable)); |
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| 336 | array_insert_last(int, addedVars, mddId); |
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| 337 | CHKPRINT2( (verbose>=3), " add Latch %s\n", nodeName ); |
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| 338 | }else if (!Ntk_NodeTestIsLatch(node)) { |
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| 339 | assert(!st_is_member(BnvTable, node)); |
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| 340 | st_insert(BnvTable, node, (char *)0); |
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| 341 | array_insert_last(int, addedBnvs, mddId); |
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| 342 | CHKPRINT2( (verbose>=3), " add BNV %s\n", nodeName ); |
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| 343 | } |
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| 344 | } |
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| 345 | |
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| 346 | /* Clean-ups */ |
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| 347 | array_free(invisibleVarMddIds); |
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| 348 | array_free(visibleVarMddIds); |
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| 349 | array_free(allPSVars); |
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| 350 | mdd_array_free(ExRings); |
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| 351 | FREE(Scores); |
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| 352 | FREE(Sel0Scores); |
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| 353 | FREE(SelScores); |
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| 354 | FREE(Sel2Scores); |
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| 355 | FREE(Sel3Scores); |
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| 356 | } |
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| 357 | |
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| 358 | /**Function******************************************************************** |
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| 359 | |
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| 360 | Synopsis [Compute the number of fanin nodes] |
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| 361 | |
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| 362 | Description [Compute the number of fanin nodes. The result is |
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| 363 | inserted in the hash table.] |
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| 364 | |
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| 365 | SideEffects [] |
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| 366 | |
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| 367 | ******************************************************************************/ |
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| 368 | int |
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| 369 | GrabNodeComputeFaninNumberTableItem( |
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| 370 | Ntk_Network_t *network, |
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| 371 | st_table *nodeToFaninNumberTable, |
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| 372 | Ntk_Node_t *node) |
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| 373 | { |
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| 374 | int count; |
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| 375 | array_t *roots, *supports; |
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| 376 | |
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| 377 | roots = array_alloc(Ntk_Node_t *, 0); |
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| 378 | if (!st_lookup_int(nodeToFaninNumberTable, node, &count)) { |
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| 379 | if (Ntk_NodeTestIsLatch(node)) |
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| 380 | array_insert(Ntk_Node_t *, roots, 0, Ntk_LatchReadDataInput(node)); |
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| 381 | else |
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| 382 | array_insert(Ntk_Node_t *, roots, 0, node); |
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| 383 | |
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| 384 | supports = Ntk_NodeComputeTransitiveFaninNodes(network, roots, TRUE,FALSE); |
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| 385 | |
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| 386 | count = array_n(supports); |
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| 387 | array_free(supports); |
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| 388 | st_insert(nodeToFaninNumberTable, node, (char *)(long)count); |
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| 389 | } |
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| 390 | array_free(roots); |
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| 391 | |
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| 392 | return count; |
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| 393 | } |
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| 394 | |
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| 395 | /*---------------------------------------------------------------------------*/ |
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| 396 | /* Definition of static functions */ |
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| 397 | /*---------------------------------------------------------------------------*/ |
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| 398 | |
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| 399 | /**Function******************************************************************** |
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| 400 | |
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| 401 | Synopsis [Compute the extended Synchronous Onion Rings (SORs).] |
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| 402 | |
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| 403 | Description [Compute the extended Synchronous Onion Rings (SORs) on |
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| 404 | the absFSm whose present state variables includes the invisible |
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| 405 | variables. The preimages, therefore, may have invisible variables in |
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| 406 | their support. The result is used only inside |
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| 407 | GrabRefineAbstractionByGrab.] |
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| 408 | |
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| 409 | SideEffects [] |
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| 410 | |
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| 411 | ******************************************************************************/ |
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| 412 | static array_t * |
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| 413 | GrabFsmComputeExRings( |
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| 414 | Fsm_Fsm_t *absFsm, |
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| 415 | st_table *absVarTable, |
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| 416 | st_table *absBnvTable, |
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| 417 | array_t *oldRings, |
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| 418 | int cexType, |
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| 419 | int verbose) |
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| 420 | { |
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| 421 | Img_ImageInfo_t *imageInfo; |
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| 422 | Ntk_Network_t *network = Fsm_FsmReadNetwork(absFsm); |
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| 423 | array_t *careStatesArray = array_alloc(mdd_t *, 0); |
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| 424 | array_t *allPsVars, *invisibleVarMddIds; |
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| 425 | array_t *onionRings, *synOnionRings; |
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| 426 | mdd_t *mdd1, *mdd2, *mdd3, *mdd4, *initStates; |
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| 427 | int i, j, mddId; |
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| 428 | Ntk_Node_t *node; |
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| 429 | |
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| 430 | imageInfo = Fsm_FsmReadOrCreateImageInfo(absFsm, 1, 0); |
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| 431 | |
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| 432 | /* Compute the initial states based on all the related latches |
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| 433 | * (i.e. visible latches and invisible ones that are in the |
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| 434 | * immediate support) |
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| 435 | */ |
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| 436 | allPsVars = GrabGetVisibleVarMddIds(absFsm, absVarTable); |
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| 437 | invisibleVarMddIds = GrabGetInvisibleVarMddIds(absFsm, absVarTable, |
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| 438 | absBnvTable); |
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| 439 | arrayForEachItem(int, invisibleVarMddIds, i, mddId) { |
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| 440 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
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| 441 | if (Ntk_NodeTestIsLatch(node)) |
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| 442 | array_insert_last(int, allPsVars, mddId); |
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| 443 | } |
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| 444 | initStates = GrabComputeInitialStates(network, allPsVars); |
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| 445 | array_free(allPsVars); |
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| 446 | array_free(invisibleVarMddIds); |
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| 447 | |
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| 448 | onionRings = oldRings; |
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| 449 | if (onionRings == NIL(array_t)) |
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| 450 | onionRings = Fsm_FsmReadReachabilityOnionRings(absFsm); |
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| 451 | assert(onionRings); |
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| 452 | |
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| 453 | synOnionRings = array_alloc(mdd_t *, array_n(onionRings)); |
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| 454 | |
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| 455 | for (j=array_n(onionRings)-2; j>=0; j--) { |
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| 456 | mdd1 = array_fetch(mdd_t *, onionRings, j+1); |
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| 457 | mdd2 = array_fetch(mdd_t *, onionRings, j); |
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| 458 | |
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| 459 | array_insert(mdd_t *, careStatesArray, 0, mdd2); |
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| 460 | mdd3 = Img_ImageInfoComputeEXWithDomainVars(imageInfo, |
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| 461 | mdd1, |
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| 462 | mdd1, |
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| 463 | careStatesArray); |
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| 464 | mdd4 = mdd_and(mdd2, mdd3, 1, 1); |
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| 465 | mdd_free(mdd3); |
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| 466 | |
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| 467 | array_insert(mdd_t *, synOnionRings, j+1, mdd4); |
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| 468 | |
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| 469 | /* when the more accurate initial states is available, use it */ |
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| 470 | if (j == 0) { |
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| 471 | mdd1 = mdd_and(mdd4, initStates, 1, 1); |
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| 472 | if (mdd_is_tautology(mdd1, 0)) { |
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| 473 | mdd_free(mdd1); |
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| 474 | mdd1 = mdd_dup(mdd4); |
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| 475 | } |
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| 476 | array_insert(mdd_t *, synOnionRings, j, mdd1); |
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| 477 | } |
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| 478 | } |
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| 479 | |
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| 480 | /* clean-up's */ |
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| 481 | mdd_free(initStates); |
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| 482 | array_free(careStatesArray); |
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| 483 | |
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| 484 | return synOnionRings; |
---|
| 485 | } |
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| 486 | |
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| 487 | /**Function******************************************************************** |
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| 488 | |
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| 489 | Synopsis [Compare the scores of the two invisible variables.] |
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| 490 | |
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| 491 | Description [Compare the scores of the two invisible variables. It |
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| 492 | is used inside GrabRefineAbstractionByGrab() for sorting the array |
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| 493 | of invisible variables. |
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| 494 | |
---|
| 495 | Note that the hash tables like Sel0ScoreTable are declareled as |
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| 496 | static global variables -- they are visible inside this source |
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| 497 | file.] |
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| 498 | |
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| 499 | SideEffects [] |
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| 500 | |
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| 501 | ******************************************************************************/ |
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| 502 | static int |
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| 503 | GrabCompareScores( |
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| 504 | const void *ptr1, |
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| 505 | const void *ptr2) |
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| 506 | { |
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| 507 | int item1 = *((int *)ptr1); |
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| 508 | int item2 = *((int *)ptr2); |
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| 509 | double *first0, *first, *first2, *first3; |
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| 510 | double *second0, *second, *second2, *second3; |
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| 511 | double value0, value, value2, value3; |
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| 512 | |
---|
| 513 | st_lookup(Sel0ScoreTable, (char *)(long)item1, &first0); |
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| 514 | st_lookup(SelScoreTable, (char *)(long)item1, &first); |
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| 515 | st_lookup(Sel2ScoreTable, (char *)(long)item1, &first2); |
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| 516 | st_lookup(Sel3ScoreTable, (char *)(long)item1, &first3); |
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| 517 | |
---|
| 518 | st_lookup(Sel0ScoreTable, (char *)(long)item2, &second0); |
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| 519 | st_lookup(SelScoreTable, (char *)(long)item2, &second); |
---|
| 520 | st_lookup(Sel2ScoreTable, (char *)(long)item2, &second2); |
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| 521 | st_lookup(Sel3ScoreTable, (char *)(long)item2, &second3); |
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| 522 | |
---|
| 523 | value0 = *second0 - *first0; |
---|
| 524 | value = *second - *first; |
---|
| 525 | value2 = *second2 - *first2; |
---|
| 526 | value3 = *second3 - *first3; |
---|
| 527 | |
---|
| 528 | if (value0 > 0) return 1; |
---|
| 529 | if (value0 < 0) return -1; |
---|
| 530 | |
---|
| 531 | if (value > 0) return 1; |
---|
| 532 | if (value < 0) return -1; |
---|
| 533 | |
---|
| 534 | return 0; |
---|
| 535 | |
---|
| 536 | /* Chao: The tie-breakers are not used for this release. We achieved |
---|
| 537 | * the best performance on the suite of testing cases at hand |
---|
| 538 | * without the tie-breakers. But the code is retained for the |
---|
| 539 | * purpose of future experiments. |
---|
| 540 | */ |
---|
| 541 | |
---|
| 542 | if (value2 > 0) return 1; |
---|
| 543 | if (value2 < 0) return -1; |
---|
| 544 | |
---|
| 545 | if (value3 > 0) return 1; |
---|
| 546 | if (value3 < 0) return -1; |
---|
| 547 | |
---|
| 548 | return 0; |
---|
| 549 | } |
---|
| 550 | |
---|
| 551 | |
---|
| 552 | /**Function******************************************************************** |
---|
| 553 | |
---|
| 554 | Synopsis [Add the supporting mddIds into the table.] |
---|
| 555 | |
---|
| 556 | Description [Add the supporting mddIds into the table.] |
---|
| 557 | |
---|
| 558 | SideEffects [] |
---|
| 559 | |
---|
| 560 | ******************************************************************************/ |
---|
| 561 | static void |
---|
| 562 | GrabMddAppendSupports( |
---|
| 563 | mdd_manager *mddManager, |
---|
| 564 | mdd_t *mdd1, |
---|
| 565 | st_table *supportsTable) |
---|
| 566 | { |
---|
| 567 | int mddId, k; |
---|
| 568 | array_t *supports = mdd_get_support(mddManager, mdd1); |
---|
| 569 | |
---|
| 570 | arrayForEachItem(int, supports, k, mddId) { |
---|
| 571 | if (!st_is_member(supportsTable, (char *)(long)mddId)) |
---|
| 572 | st_insert(supportsTable, (char *)(long)mddId, (char *)0); |
---|
| 573 | } |
---|
| 574 | array_free(supports); |
---|
| 575 | } |
---|
| 576 | |
---|
| 577 | |
---|
| 578 | /**Function******************************************************************** |
---|
| 579 | |
---|
| 580 | Synopsis [Compute the degree of dependence that the abstract model |
---|
| 581 | has on the invisible variables.] |
---|
| 582 | |
---|
| 583 | Description [Compute the degree of dependence that the abstract model |
---|
| 584 | has on the invisible variables.] |
---|
| 585 | |
---|
| 586 | SideEffects [] |
---|
| 587 | |
---|
| 588 | ******************************************************************************/ |
---|
| 589 | static array_t * |
---|
| 590 | ComputeDependence( |
---|
| 591 | Ntk_Network_t *network, |
---|
| 592 | st_table *vertexTable, |
---|
| 593 | array_t *leftVars) |
---|
| 594 | { |
---|
| 595 | array_t *roots, *supports; |
---|
| 596 | st_table *supportTable; |
---|
| 597 | st_generator *stgen; |
---|
| 598 | array_t *dependenceArray = array_alloc(int, array_n(leftVars)); |
---|
| 599 | int i,mddId; |
---|
| 600 | Ntk_Node_t *node, *node1; |
---|
| 601 | int count; |
---|
| 602 | |
---|
| 603 | /* initialize the scores to 0 */ |
---|
| 604 | supportTable = st_init_table(st_ptrcmp, st_ptrhash); |
---|
| 605 | arrayForEachItem(int, leftVars, i, mddId) { |
---|
| 606 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
---|
| 607 | assert(node); |
---|
| 608 | st_insert(supportTable, node, (char *)0); |
---|
| 609 | } |
---|
| 610 | |
---|
| 611 | /* compute the supports of the absFsm */ |
---|
| 612 | roots = array_alloc(Ntk_Node_t *, 0); |
---|
| 613 | st_foreach_item(vertexTable, stgen, &node, 0) { |
---|
| 614 | node = Ntk_LatchReadDataInput(node); |
---|
| 615 | array_insert(Ntk_Node_t *, roots, 0, node); |
---|
| 616 | |
---|
| 617 | supports = Ntk_NodeComputeTransitiveFaninNodes(network, roots, TRUE, |
---|
| 618 | FALSE); |
---|
| 619 | |
---|
| 620 | arrayForEachItem(Ntk_Node_t *, supports, i, node1) { |
---|
| 621 | if (st_lookup_int(supportTable, node1, &count)) { |
---|
| 622 | count++; |
---|
| 623 | st_insert(supportTable, node1, (char *)(long)count); |
---|
| 624 | } |
---|
| 625 | } |
---|
| 626 | array_free(supports); |
---|
| 627 | } |
---|
| 628 | array_free(roots); |
---|
| 629 | |
---|
| 630 | /* put into an array */ |
---|
| 631 | arrayForEachItem(int, leftVars, i, mddId) { |
---|
| 632 | node = Ntk_NetworkFindNodeByMddId(network, mddId); |
---|
| 633 | assert(node); |
---|
| 634 | st_lookup_int(supportTable, node, &count); |
---|
| 635 | array_insert(int, dependenceArray, i, count); |
---|
| 636 | } |
---|
| 637 | |
---|
| 638 | st_free_table(supportTable); |
---|
| 639 | |
---|
| 640 | return dependenceArray; |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | |
---|
| 644 | |
---|