summaryrefslogtreecommitdiffstats
path: root/src/map/mapper/mapperSuper.c
blob: 0c33d5800b0bd99735a108e8ca8777e8742e977e (plain)
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
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
/**CFile****************************************************************

  FileName    [mapperSuper.c]

  PackageName [MVSIS 1.3: Multi-valued logic synthesis system.]

  Synopsis    [Generic technology mapping engine.]

  Author      [MVSIS Group]
  
  Affiliation [UC Berkeley]

  Date        [Ver. 2.0. Started - June 1, 2004.]

  Revision    [$Id: mapperSuper.c,v 1.6 2005/01/23 06:59:44 alanmi Exp $]

***********************************************************************/

#include "mapperInt.h"

ABC_NAMESPACE_IMPL_START


////////////////////////////////////////////////////////////////////////
///                        DECLARATIONS                              ///
////////////////////////////////////////////////////////////////////////

static int           Map_LibraryReadFile( Map_SuperLib_t * pLib, FILE * pFile );
static Map_Super_t * Map_LibraryReadGate( Map_SuperLib_t * pLib, char * pBuffer, int nVars );
static int           Map_LibraryTruthVerify( Map_SuperLib_t * pLib, Map_Super_t * pGate );
static void          Map_LibraryComputeTruth( Map_SuperLib_t * pLib, char * pFormula, unsigned uTruthRes[] );
static void          Map_LibraryComputeTruth_rec( Map_SuperLib_t * pLib, char * pFormula, unsigned uTruthsIn[][2], unsigned uTruthRes[] );
static void          Map_LibraryPrintClasses( Map_SuperLib_t * p );

////////////////////////////////////////////////////////////////////////
///                     FUNCTION DEFINITIONS                         ///
////////////////////////////////////////////////////////////////////////

/**Function*************************************************************

  Synopsis    [Reads the supergate library from file.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
int Map_LibraryRead( Map_SuperLib_t * pLib, char * pFileName )
{
    FILE * pFile;
    int Status;
    // read the beginning of the file
    assert( pLib->pGenlib == NULL );
    pFile = fopen( pFileName, "r" );
    if ( pFile == NULL )
    {
        printf( "Cannot open input file \"%s\".\n", pFileName );
        return 0;
    }
    Status = Map_LibraryReadFile( pLib, pFile );
    fclose( pFile );
//    Map_LibraryPrintClasses( pLib );
    return Status;
}


/**Function*************************************************************

  Synopsis    [Reads the library file.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
int Map_LibraryReadFile( Map_SuperLib_t * pLib, FILE * pFile )
{
    ProgressBar * pProgress;
    char pBuffer[5000];
    FILE * pFileGen;
    Map_Super_t * pGate;
    char * pTemp = NULL; // Suppress "might be used uninitialized"
    char * pLibName;
    int nCounter, nGatesTotal;
    unsigned uCanon[2];
    int RetValue;

    // skip empty and comment lines
    while ( fgets( pBuffer, 2000, pFile ) != NULL )
    {
        // skip leading spaces
        for ( pTemp = pBuffer; *pTemp == ' ' || *pTemp == '\r' || *pTemp == '\n'; pTemp++ );
        // skip comment lines and empty lines
        if ( *pTemp != 0 && *pTemp != '#' )
            break;
    }

    // get the genlib file name
    pLibName = strtok( pTemp, " \t\r\n" );
    if ( strcmp( pLibName, "GATE" ) == 0 )
    {
        printf( "The input file \"%s\" looks like a genlib file and not a supergate library file.\n", pLib->pName );
        return 0;
    }
    pFileGen = fopen( pLibName, "r" );
    if ( pFileGen == NULL )
    {
        printf( "Cannot open the genlib file \"%s\".\n", pLibName );
        return 0;
    }
    fclose( pFileGen );

    // read the genlib library
    pLib->pGenlib = Mio_LibraryRead( pLibName, NULL, 0, 0 );
    if ( pLib->pGenlib == NULL )
    {
        printf( "Cannot read genlib file \"%s\".\n", pLibName );
        return 0;
    }

    // read the number of variables
    RetValue = fscanf( pFile, "%d\n", &pLib->nVarsMax );
    if ( pLib->nVarsMax < 2 || pLib->nVarsMax > 10 )
    {
        printf( "Suspicious number of variables (%d).\n", pLib->nVarsMax );
        return 0;
    }

    // read the number of gates
    RetValue = fscanf( pFile, "%d\n", &nGatesTotal );
    if ( nGatesTotal < 1 || nGatesTotal > 10000000 )
    {
        printf( "Suspicious number of gates (%d).\n", nGatesTotal );
        return 0;
    }

    // read the lines
    nCounter = 0;
    pProgress = Extra_ProgressBarStart( stdout, nGatesTotal );
    while ( fgets( pBuffer, 5000, pFile ) != NULL )
    {
        for ( pTemp = pBuffer; *pTemp == ' ' || *pTemp == '\r' || *pTemp == '\n'; pTemp++ );
        if ( pTemp[0] == '\0' )
            continue;
        // get the gate
        pGate = Map_LibraryReadGate( pLib, pTemp, pLib->nVarsMax );
        assert( pGate->Num == nCounter + 1 );
        // count the number of parentheses in the formula - this is the number of gates
        for ( pTemp = pGate->pFormula; *pTemp; pTemp++ )
            pGate->nGates += (*pTemp == '(');
        // verify the truth table
        assert( Map_LibraryTruthVerify(pLib, pGate) );

        // find the N-canonical form of this supergate
        pGate->nPhases = Map_CanonComputeSlow( pLib->uTruths, pLib->nVarsMax, pLib->nVarsMax, pGate->uTruth, pGate->uPhases, uCanon );
        // add the supergate into the table by its N-canonical table
        Map_SuperTableInsertC( pLib->tTableC, uCanon, pGate );
        // update the progress bar
        Extra_ProgressBarUpdate( pProgress, ++nCounter, NULL );
    }
    Extra_ProgressBarStop( pProgress );
    pLib->nSupersAll = nCounter;
    if ( nCounter != nGatesTotal )
        printf( "The number of gates read (%d) is different what the file says (%d).\n", nGatesTotal, nCounter );
    return 1;
}

/**Function*************************************************************

  Synopsis    []

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Map_Super_t * Map_LibraryReadGate( Map_SuperLib_t * pLib, char * pBuffer, int nVars )
{
    Map_Super_t * pGate;
    char * pTemp;
    int i;

    // start and clean the gate
    pGate = (Map_Super_t *)Extra_MmFixedEntryFetch( pLib->mmSupers );
    memset( pGate, 0, sizeof(Map_Super_t) );

    // read the number
    pTemp = strtok( pBuffer, " " );
    pGate->Num = atoi(pTemp);

    // read the signature
    pTemp = strtok( NULL, " " );
    if ( pLib->nVarsMax < 6 )
    {
        pGate->uTruth[0] = Extra_ReadBinary(pTemp);
        pGate->uTruth[1] = 0;
    }
    else
    {
        pGate->uTruth[0] = Extra_ReadBinary(pTemp+32);
        pTemp[32] = 0;
        pGate->uTruth[1] = Extra_ReadBinary(pTemp);
    }

    // read the max delay
    pTemp = strtok( NULL, " " );
    pGate->tDelayMax.Rise = (float)atof(pTemp);
    pGate->tDelayMax.Fall = pGate->tDelayMax.Rise;

    // read the pin-to-pin delay
    for ( i = 0; i < nVars; i++ )
    {
        pTemp = strtok( NULL, " " );
        pGate->tDelaysR[i].Rise = (float)atof(pTemp);
        pGate->tDelaysF[i].Fall = pGate->tDelaysR[i].Rise;
    }

    // read the area
    pTemp = strtok( NULL, " " );
    pGate->Area = (float)atof(pTemp);

    // the rest is the gate name
    pTemp = strtok( NULL, " \r\n" );
    if ( strlen(pTemp) == 0 )
        printf( "A gate name is empty.\n" );

    // save the gate name
    pGate->pFormula = Extra_MmFlexEntryFetch( pLib->mmForms, strlen(pTemp) + 1 );
    strcpy( pGate->pFormula, pTemp );

    // the rest is the gate name
    pTemp = strtok( NULL, " \n\0" );
    if ( pTemp != NULL )
        printf( "The following trailing symbols found \"%s\".\n", pTemp );
    return pGate;
}

/**Function*************************************************************

  Synopsis    [Performs one step of parsing the formula into parts.]

  Description [This function will eventually be replaced when the
  tree-supergate library representation will become standard.]
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
char * Map_LibraryReadFormulaStep( char * pFormula, char * pStrings[], int * pnStrings )
{
    char * pName, * pPar1, * pPar2, * pCur;
    int nStrings, CountPars;

    // skip leading spaces
    for ( pName = pFormula; *pName && *pName == ' '; pName++ );
    assert( *pName );
    // find the first opening parenthesis
    for ( pPar1 = pName; *pPar1 && *pPar1 != '('; pPar1++ );
    if ( *pPar1 == 0 )
    {
        *pnStrings = 0;
        return pName;
    }
    // overwrite it with space
    assert( *pPar1 == '(' );
    *pPar1 = 0;
    // find the corresponding closing parenthesis
    for ( CountPars = 1, pPar2 = pPar1 + 1; *pPar2 && CountPars; pPar2++ )
        if ( *pPar2 == '(' )
            CountPars++;
        else if ( *pPar2 == ')' )
            CountPars--;
    pPar2--;
    assert( CountPars == 0 );
    // overwrite it with space
    assert( *pPar2 == ')' );
    *pPar2 = 0;
    // save the intervals between the commas
    nStrings = 0;
    pCur = pPar1 + 1;
    while ( 1 )
    {
        // save the current string
        pStrings[ nStrings++ ] = pCur;
        // find the beginning of the next string
        for ( CountPars = 0; *pCur && (CountPars || *pCur != ','); pCur++ )
            if ( *pCur == '(' )
                CountPars++;
            else if ( *pCur == ')' )
                CountPars--;
        if ( *pCur == 0 )
            break;
        assert( *pCur == ',' );
        *pCur = 0;
        pCur++;
    }
    // save the results and return
    *pnStrings = nStrings;
    return pName;
}


/**Function*************************************************************

  Synopsis    [Verifies the truth table of the supergate.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
int Map_LibraryTruthVerify( Map_SuperLib_t * pLib, Map_Super_t * pGate )
{
    unsigned uTruthRes[2];
    Map_LibraryComputeTruth( pLib, pGate->pFormula, uTruthRes );
    if ( uTruthRes[0] != pGate->uTruth[0] || uTruthRes[1] != pGate->uTruth[1] )
        return 0;
    return 1;
}


/**Function*************************************************************

  Synopsis    [Derives the functionality of the supergate.]

  Description [This procedure is useful for verification the supergate 
  library. The truth table derived by this procedure should be the same
  as the one contained in the original supergate file.]
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
void Map_LibraryComputeTruth( Map_SuperLib_t * pLib, char * pFormula, unsigned uTruthRes[] )
{
    char Buffer[1000];
    strcpy( Buffer, pFormula );
    Map_LibraryComputeTruth_rec( pLib, Buffer, pLib->uTruths, uTruthRes );
}

/**Function*************************************************************

  Synopsis    [Derives the functionality of the supergate.]

  Description [This procedure is useful for verification the supergate 
  library. The truth table derived by this procedure should be the same
  as the one contained in the original supergate file.]
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
void Map_LibraryComputeTruth_rec( Map_SuperLib_t * pLib, char * pFormula, unsigned uTruthsIn[][2], unsigned uTruthRes[] )
{
    Mio_Gate_t * pMioGate;
    char * pGateName, * pStrings[6];
    unsigned uTruthsFanins[6][2];
    int nStrings, i;

    // perform one step parsing of the formula
    // detect the root gate name, the next-step strings, and their number
    pGateName = Map_LibraryReadFormulaStep( pFormula, pStrings, &nStrings );
    if ( nStrings == 0 ) // elementary variable
    {
        assert( pGateName[0] - 'a' < pLib->nVarsMax );
        uTruthRes[0] = uTruthsIn[pGateName[0] - 'a'][0];
        uTruthRes[1] = uTruthsIn[pGateName[0] - 'a'][1];
        return;
    }
    // derive the functionality of the fanins
    for ( i = 0; i < nStrings; i++ )
        Map_LibraryComputeTruth_rec( pLib, pStrings[i], uTruthsIn, uTruthsFanins[i] );
    // get the root supergate
    pMioGate = Mio_LibraryReadGateByName( pLib->pGenlib, pGateName, NULL );
    if ( pMioGate == NULL )
        printf( "A supergate contains gate \"%s\" that is not in \"%s\".\n", pGateName, Mio_LibraryReadName(pLib->pGenlib) ); 
    // derive the functionality of the output of the supergate
    Mio_DeriveTruthTable( pMioGate, uTruthsFanins, nStrings, pLib->nVarsMax, uTruthRes );
}

/**Function*************************************************************

  Synopsis    []

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
void Map_LibraryPrintSupergate( Map_Super_t * pGate )
{
    printf( "%5d : ",  pGate->nUsed );
    printf( "%5d   ",  pGate->Num );
    printf( "A = %5.2f   ",  pGate->Area );
    printf( "D = %5.2f/%5.2f/%5.2f   ", pGate->tDelayMax.Rise, pGate->tDelayMax.Fall, pGate->tDelayMax.Worst );
    printf( "%s",    pGate->pFormula );
    printf( "\n" );
}


/**Function*************************************************************

  Synopsis    [Prints N-classes of supergates.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
void Map_LibraryPrintClasses( Map_SuperLib_t * p )
{
/*
    st__generator * gen;
    Map_Super_t * pSuper, * pSuper2;
    unsigned Key, uTruth;
    int Counter = 0;
    // copy all the supergates into one array
    st__foreach_item( p->tSuplib, gen, (char **)&Key, (char **)&pSuper )
    {
        for ( pSuper2 = pSuper; pSuper2; pSuper2 = pSuper2->pNext )
        {
            uTruth = pSuper2->Phase;
            Extra_PrintBinary( stdout, &uTruth, 5 );
            printf( "  %5d   ",  pSuper2->Num );
            printf( "%s",    pSuper2->pFormula );
            printf( "\n" );
        }
        printf( "\n" );
        if ( ++ Counter == 100 )
            break;
    }
*/
}

////////////////////////////////////////////////////////////////////////
///                       END OF FILE                                ///
////////////////////////////////////////////////////////////////////////


ABC_NAMESPACE_IMPL_END