1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
|
/**CFile****************************************************************
FileName [abcRenode.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis []
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcRenode.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
#include "reo.h"
#include "if.h"
#include "kit.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static int Abc_NtkRenodeEvalAig( If_Cut_t * pCut );
static int Abc_NtkRenodeEvalBdd( If_Cut_t * pCut );
static int Abc_NtkRenodeEvalSop( If_Cut_t * pCut );
static int Abc_NtkRenodeEvalCnf( If_Cut_t * pCut );
static int Abc_NtkRenodeEvalMv( If_Cut_t * pCut );
static reo_man * s_pReo = NULL;
static DdManager * s_pDd = NULL;
static Vec_Int_t * s_vMemory = NULL;
static Vec_Int_t * s_vMemory2 = NULL;
static int nDsdCounter = 0;
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Performs renoding as technology mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkRenode( Abc_Ntk_t * pNtk, int nFaninMax, int nCubeMax, int nFlowIters, int nAreaIters, int fArea, int fUseBdds, int fUseSops, int fUseCnfs, int fUseMv, int fVerbose )
{
extern Abc_Ntk_t * Abc_NtkIf( Abc_Ntk_t * pNtk, If_Par_t * pPars );
If_Par_t Pars, * pPars = &Pars;
Abc_Ntk_t * pNtkNew;
if ( Abc_NtkGetChoiceNum( pNtk ) )
printf( "Performing renoding with choices.\n" );
nDsdCounter = 0;
// set defaults
memset( pPars, 0, sizeof(If_Par_t) );
// user-controlable paramters
pPars->nLutSize = nFaninMax;
pPars->nCutsMax = nCubeMax;
pPars->nFlowIters = nFlowIters;
pPars->nAreaIters = nAreaIters;
pPars->DelayTarget = -1;
pPars->Epsilon = (float)0.005;
pPars->fPreprocess = 1;
pPars->fArea = fArea;
pPars->fFancy = 0;
pPars->fExpRed = 0; //
pPars->fLatchPaths = 0;
pPars->fSeqMap = 0;
pPars->fVerbose = fVerbose;
// internal parameters
pPars->fTruth = 1;
pPars->fUsePerm = 1;
pPars->nLatches = 0;
pPars->pLutLib = NULL; // Abc_FrameReadLibLut();
pPars->pTimesArr = NULL;
pPars->pTimesArr = NULL;
pPars->fUseBdds = fUseBdds;
pPars->fUseSops = fUseSops;
pPars->fUseCnfs = fUseCnfs;
pPars->fUseMv = fUseMv;
if ( fUseBdds )
pPars->pFuncCost = Abc_NtkRenodeEvalBdd;
else if ( fUseSops )
pPars->pFuncCost = Abc_NtkRenodeEvalSop;
else if ( fUseCnfs )
{
pPars->fArea = 1;
pPars->pFuncCost = Abc_NtkRenodeEvalCnf;
}
else if ( fUseMv )
pPars->pFuncCost = Abc_NtkRenodeEvalMv;
else
pPars->pFuncCost = Abc_NtkRenodeEvalAig;
// start the manager
if ( fUseBdds )
{
assert( s_pReo == NULL );
s_pDd = Cudd_Init( nFaninMax, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
s_pReo = Extra_ReorderInit( nFaninMax, 100 );
pPars->pReoMan = s_pReo;
}
else
{
assert( s_vMemory == NULL );
s_vMemory = Vec_IntAlloc( 1 << 16 );
s_vMemory2 = Vec_IntAlloc( 1 << 16 );
}
// perform mapping/renoding
pNtkNew = Abc_NtkIf( pNtk, pPars );
// start the manager
if ( fUseBdds )
{
Extra_StopManager( s_pDd );
Extra_ReorderQuit( s_pReo );
s_pReo = NULL;
s_pDd = NULL;
}
else
{
Vec_IntFree( s_vMemory );
Vec_IntFree( s_vMemory2 );
s_vMemory = NULL;
s_vMemory2 = NULL;
}
// printf( "Decomposed %d functions.\n", nDsdCounter );
return pNtkNew;
}
/**Function*************************************************************
Synopsis [Computes the cost based on the factored form.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkRenodeEvalAig( If_Cut_t * pCut )
{
Kit_Graph_t * pGraph;
int i, nNodes;
/*
extern void Kit_DsdTest( unsigned * pTruth, int nVars );
if ( If_CutLeaveNum(pCut) == 8 )
{
nDsdCounter++;
Kit_DsdTest( If_CutTruth(pCut), If_CutLeaveNum(pCut) );
}
*/
pGraph = Kit_TruthToGraph( If_CutTruth(pCut), If_CutLeaveNum(pCut), s_vMemory );
if ( pGraph == NULL )
{
for ( i = 0; i < If_CutLeaveNum(pCut); i++ )
pCut->pPerm[i] = 100;
return IF_COST_MAX;
}
nNodes = Kit_GraphNodeNum( pGraph );
for ( i = 0; i < If_CutLeaveNum(pCut); i++ )
pCut->pPerm[i] = Kit_GraphLeafDepth_rec( pGraph, Kit_GraphNodeLast(pGraph), Kit_GraphNode(pGraph, i) );
Kit_GraphFree( pGraph );
return nNodes;
}
/**Function*************************************************************
Synopsis [Computes the cost based on the BDD size after reordering.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkRenodeEvalBdd( If_Cut_t * pCut )
{
int pOrder[IF_MAX_LUTSIZE];
DdNode * bFunc, * bFuncNew;
int i, k, nNodes;
for ( i = 0; i < If_CutLeaveNum(pCut); i++ )
pCut->pPerm[i] = pOrder[i] = -100;
bFunc = Kit_TruthToBdd( s_pDd, If_CutTruth(pCut), If_CutLeaveNum(pCut), 0 ); Cudd_Ref( bFunc );
bFuncNew = Extra_Reorder( s_pReo, s_pDd, bFunc, pOrder ); Cudd_Ref( bFuncNew );
for ( i = k = 0; i < If_CutLeaveNum(pCut); i++ )
if ( pOrder[i] >= 0 )
pCut->pPerm[pOrder[i]] = ++k; // double-check this!
nNodes = -1 + Cudd_DagSize( bFuncNew );
Cudd_RecursiveDeref( s_pDd, bFuncNew );
Cudd_RecursiveDeref( s_pDd, bFunc );
return nNodes;
}
/**Function*************************************************************
Synopsis [Computes the cost based on ISOP.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkRenodeEvalSop( If_Cut_t * pCut )
{
int i, RetValue;
for ( i = 0; i < If_CutLeaveNum(pCut); i++ )
pCut->pPerm[i] = 1;
RetValue = Kit_TruthIsop( If_CutTruth(pCut), If_CutLeaveNum(pCut), s_vMemory, 1 );
if ( RetValue == -1 )
return IF_COST_MAX;
assert( RetValue == 0 || RetValue == 1 );
return Vec_IntSize( s_vMemory );
}
/**Function*************************************************************
Synopsis [Computes the cost based on two ISOPs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkRenodeEvalCnf( If_Cut_t * pCut )
{
int i, RetValue, nClauses;
// set internal mapper parameters
for ( i = 0; i < If_CutLeaveNum(pCut); i++ )
pCut->pPerm[i] = 1;
// compute ISOP for the positive phase
RetValue = Kit_TruthIsop( If_CutTruth(pCut), If_CutLeaveNum(pCut), s_vMemory, 0 );
if ( RetValue == -1 )
return IF_COST_MAX;
assert( RetValue == 0 || RetValue == 1 );
nClauses = Vec_IntSize( s_vMemory );
// compute ISOP for the negative phase
Kit_TruthNot( If_CutTruth(pCut), If_CutTruth(pCut), If_CutLeaveNum(pCut) );
RetValue = Kit_TruthIsop( If_CutTruth(pCut), If_CutLeaveNum(pCut), s_vMemory, 0 );
Kit_TruthNot( If_CutTruth(pCut), If_CutTruth(pCut), If_CutLeaveNum(pCut) );
if ( RetValue == -1 )
return IF_COST_MAX;
assert( RetValue == 0 || RetValue == 1 );
nClauses += Vec_IntSize( s_vMemory );
return nClauses;
}
/**Function*************************************************************
Synopsis [Computes the cost of MV-SOP of the cut function.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkRenodeEvalMv( If_Cut_t * pCut )
{
int i, RetValue;
// set internal mapper parameters
for ( i = 0; i < If_CutLeaveNum(pCut); i++ )
pCut->pPerm[i] = 1;
// compute ISOP for the positive phase
RetValue = Kit_TruthIsop( If_CutTruth(pCut), If_CutLeaveNum(pCut), s_vMemory, 0 );
if ( RetValue == -1 )
return IF_COST_MAX;
assert( RetValue == 0 || RetValue == 1 );
// compute ISOP for the negative phase
Kit_TruthNot( If_CutTruth(pCut), If_CutTruth(pCut), If_CutLeaveNum(pCut) );
RetValue = Kit_TruthIsop( If_CutTruth(pCut), If_CutLeaveNum(pCut), s_vMemory2, 0 );
Kit_TruthNot( If_CutTruth(pCut), If_CutTruth(pCut), If_CutLeaveNum(pCut) );
if ( RetValue == -1 )
return IF_COST_MAX;
assert( RetValue == 0 || RetValue == 1 );
// return the cost of the cut
RetValue = Abc_NodeEvalMvCost( If_CutLeaveNum(pCut), s_vMemory, s_vMemory2 );
if ( RetValue >= IF_COST_MAX )
return IF_COST_MAX;
return RetValue;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
