summaryrefslogtreecommitdiffstats
path: root/src/map/amap/amapParse.c
blob: 6d8b752025ff5b94c3307141525404dff87ec668 (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
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
/**CFile****************************************************************

  FileName    [amapParse.c]

  SystemName  [ABC: Logic synthesis and verification system.]

  PackageName [Technology mapper for standard cells.]

  Synopsis    [Parses representations of gates.]

  Author      [Alan Mishchenko]
  
  Affiliation [UC Berkeley]

  Date        [Ver. 1.0. Started - June 20, 2005.]

  Revision    [$Id: amapParse.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]

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

#include "amapInt.h"
#include "aig/hop/hop.h"
#include "bool/kit/kit.h"

ABC_NAMESPACE_IMPL_START


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

// the list of operation symbols to be used in expressions
#define AMAP_EQN_SYM_OPEN    '('   // opening paranthesis
#define AMAP_EQN_SYM_CLOSE   ')'   // closing paranthesis
#define AMAP_EQN_SYM_CONST0  '0'   // constant 0
#define AMAP_EQN_SYM_CONST1  '1'   // constant 1
#define AMAP_EQN_SYM_NEG     '!'   // negation before the variable
#define AMAP_EQN_SYM_NEGAFT  '\''  // negation after the variable
#define AMAP_EQN_SYM_AND     '*'   // logic AND
#define AMAP_EQN_SYM_AND2    '&'   // logic AND
#define AMAP_EQN_SYM_XOR     '^'   // logic XOR
#define AMAP_EQN_SYM_OR      '+'   // logic OR
#define AMAP_EQN_SYM_OR2     '|'   // logic OR

// the list of opcodes (also specifying operation precedence)
#define AMAP_EQN_OPER_NEG    10    // negation
#define AMAP_EQN_OPER_AND     9    // logic AND
#define AMAP_EQN_OPER_XOR     8    // logic XOR
#define AMAP_EQN_OPER_OR      7    // logic OR
#define AMAP_EQN_OPER_MARK    1    // OpStack token standing for an opening paranthesis

// these are values of the internal Flag
#define AMAP_EQN_FLAG_START   1    // after the opening parenthesis 
#define AMAP_EQN_FLAG_VAR     2    // after operation is received
#define AMAP_EQN_FLAG_OPER    3    // after operation symbol is received
#define AMAP_EQN_FLAG_ERROR   4    // when error is detected

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

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

  Synopsis    [Performs the operation on the top entries in the stack.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Hop_Obj_t * Amap_ParseFormulaOper( Hop_Man_t * pMan, Vec_Ptr_t * pStackFn, int Oper )
{
    Hop_Obj_t * gArg1, * gArg2, * gFunc;
    // perform the given operation
    gArg2 = (Hop_Obj_t *)Vec_PtrPop( pStackFn );
    gArg1 = (Hop_Obj_t *)Vec_PtrPop( pStackFn );
    if ( Oper == AMAP_EQN_OPER_AND )
        gFunc = Hop_And( pMan, gArg1, gArg2 );
    else if ( Oper == AMAP_EQN_OPER_OR )
        gFunc = Hop_Or( pMan, gArg1, gArg2 );
    else if ( Oper == AMAP_EQN_OPER_XOR )
        gFunc = Hop_Exor( pMan, gArg1, gArg2 );
    else
        return NULL;
//    Cudd_Ref( gFunc );
//    Cudd_RecursiveDeref( dd, gArg1 );
//    Cudd_RecursiveDeref( dd, gArg2 );
    Vec_PtrPush( pStackFn,  gFunc );
    return gFunc;
}

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

  Synopsis    [Derives the AIG corresponding to the equation.]

  Description [Takes the stream to output messages, the formula, the vector
  of variable names and the AIG manager.]
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Hop_Obj_t * Amap_ParseFormula( FILE * pOutput, char * pFormInit, Vec_Ptr_t * vVarNames, Hop_Man_t * pMan )
{
    char * pFormula;
    Vec_Ptr_t * pStackFn;
    Vec_Int_t * pStackOp;
    Hop_Obj_t * gFunc;
    char * pTemp, * pName;
    int nParans, fFound, Flag;
    int Oper, Oper1, Oper2;
    int i, v;

    // make sure that the number of opening and closing parantheses is the same
    nParans = 0;
    for ( pTemp = pFormInit; *pTemp; pTemp++ )
        if ( *pTemp == '(' )
            nParans++;
        else if ( *pTemp == ')' )
            nParans--;
    if ( nParans != 0 )
    {
        fprintf( pOutput, "Amap_ParseFormula(): Different number of opening and closing parantheses ().\n" );
        return NULL;
    }

    // copy the formula
    pFormula = ABC_ALLOC( char, strlen(pFormInit) + 3 );
    sprintf( pFormula, "(%s)", pFormInit );

    // start the stacks
    pStackFn = Vec_PtrAlloc( 100 );
    pStackOp = Vec_IntAlloc( 100 );

    Flag = AMAP_EQN_FLAG_START;
    for ( pTemp = pFormula; *pTemp; pTemp++ )
    {
        switch ( *pTemp )
        {
        // skip all spaces, tabs, and end-of-lines
        case ' ':
        case '\t':
        case '\r':
        case '\n':
            continue;
        case AMAP_EQN_SYM_CONST0:
            Vec_PtrPush( pStackFn, Hop_ManConst0(pMan) );  // Cudd_Ref( b0 );
            if ( Flag == AMAP_EQN_FLAG_VAR )
            {
                fprintf( pOutput, "Amap_ParseFormula(): No operation symbol before constant 0.\n" );
                Flag = AMAP_EQN_FLAG_ERROR; 
                break;
            }
            Flag = AMAP_EQN_FLAG_VAR; 
            break;
        case AMAP_EQN_SYM_CONST1:
            Vec_PtrPush( pStackFn, Hop_ManConst1(pMan) );  //  Cudd_Ref( b1 );
            if ( Flag == AMAP_EQN_FLAG_VAR )
            {
                fprintf( pOutput, "Amap_ParseFormula(): No operation symbol before constant 1.\n" );
                Flag = AMAP_EQN_FLAG_ERROR; 
                break;
            }
            Flag = AMAP_EQN_FLAG_VAR; 
            break;
        case AMAP_EQN_SYM_NEG:
            if ( Flag == AMAP_EQN_FLAG_VAR )
            {// if NEGBEF follows a variable, AND is assumed
                Vec_IntPush( pStackOp, AMAP_EQN_OPER_AND );
                Flag = AMAP_EQN_FLAG_OPER;
            }
            Vec_IntPush( pStackOp, AMAP_EQN_OPER_NEG );
            break;
        case AMAP_EQN_SYM_NEGAFT:
            if ( Flag != AMAP_EQN_FLAG_VAR )
            {// if there is no variable before NEGAFT, it is an error
                fprintf( pOutput, "Amap_ParseFormula(): No variable is specified before the negation suffix.\n" );
                Flag = AMAP_EQN_FLAG_ERROR; 
                break;
            }
            else // if ( Flag == PARSE_FLAG_VAR )
                Vec_PtrPush( pStackFn, Hop_Not( (Hop_Obj_t *)Vec_PtrPop(pStackFn) ) );
            break;
        case AMAP_EQN_SYM_AND:
        case AMAP_EQN_SYM_AND2:
        case AMAP_EQN_SYM_OR:
        case AMAP_EQN_SYM_OR2:
        case AMAP_EQN_SYM_XOR:
            if ( Flag != AMAP_EQN_FLAG_VAR )
            {
                fprintf( pOutput, "Amap_ParseFormula(): There is no variable before AND, EXOR, or OR.\n" );
                Flag = AMAP_EQN_FLAG_ERROR; 
                break;
            }
            if ( *pTemp == AMAP_EQN_SYM_AND || *pTemp == AMAP_EQN_SYM_AND2 )
                Vec_IntPush( pStackOp, AMAP_EQN_OPER_AND );
            else if ( *pTemp == AMAP_EQN_SYM_OR || *pTemp == AMAP_EQN_SYM_OR2 )
                Vec_IntPush( pStackOp, AMAP_EQN_OPER_OR );
            else //if ( *pTemp == AMAP_EQN_SYM_XOR )
                Vec_IntPush( pStackOp, AMAP_EQN_OPER_XOR );
            Flag = AMAP_EQN_FLAG_OPER; 
            break;
        case AMAP_EQN_SYM_OPEN:
            if ( Flag == AMAP_EQN_FLAG_VAR )
            {
                Vec_IntPush( pStackOp, AMAP_EQN_OPER_AND );
//                fprintf( pOutput, "Amap_ParseFormula(): An opening paranthesis follows a var without operation sign.\n" ); 
//                Flag = AMAP_EQN_FLAG_ERROR; 
//              break; 
            }
            Vec_IntPush( pStackOp, AMAP_EQN_OPER_MARK );
            // after an opening bracket, it feels like starting over again
            Flag = AMAP_EQN_FLAG_START; 
            break;
        case AMAP_EQN_SYM_CLOSE:
            if ( Vec_IntSize( pStackOp ) != 0 )
            {
                while ( 1 )
                {
                    if ( Vec_IntSize( pStackOp ) == 0 )
                    {
                        fprintf( pOutput, "Amap_ParseFormula(): There is no opening paranthesis\n" );
                        Flag = AMAP_EQN_FLAG_ERROR; 
                        break;
                    }
                    Oper = Vec_IntPop( pStackOp );
                    if ( Oper == AMAP_EQN_OPER_MARK )
                        break;

                    // perform the given operation
                    if ( Amap_ParseFormulaOper( pMan, pStackFn, Oper ) == NULL )
                    {
                        fprintf( pOutput, "Amap_ParseFormula(): Unknown operation\n" );
                        ABC_FREE( pFormula );
                        Vec_PtrFreeP( &pStackFn );
                        Vec_IntFreeP( &pStackOp );
                        return NULL;
                    }
                }
            }
            else
            {
                fprintf( pOutput, "Amap_ParseFormula(): There is no opening paranthesis\n" );
                Flag = AMAP_EQN_FLAG_ERROR; 
                break;
            }
            if ( Flag != AMAP_EQN_FLAG_ERROR )
                Flag = AMAP_EQN_FLAG_VAR; 
            break;


        default:
            // scan the next name
            for ( i = 0; pTemp[i] && 
                         pTemp[i] != ' ' && pTemp[i] != '\t' && pTemp[i] != '\r' && pTemp[i] != '\n' &&
                         pTemp[i] != AMAP_EQN_SYM_AND && pTemp[i] != AMAP_EQN_SYM_AND2 && pTemp[i] != AMAP_EQN_SYM_OR && pTemp[i] != AMAP_EQN_SYM_OR2 && 
                         pTemp[i] != AMAP_EQN_SYM_XOR && pTemp[i] != AMAP_EQN_SYM_NEGAFT && pTemp[i] != AMAP_EQN_SYM_CLOSE; 
                  i++ )
              {
                    if ( pTemp[i] == AMAP_EQN_SYM_NEG || pTemp[i] == AMAP_EQN_SYM_OPEN )
                    {
                        fprintf( pOutput, "Amap_ParseFormula(): The negation sign or an opening paranthesis inside the variable name.\n" );
                        Flag = AMAP_EQN_FLAG_ERROR; 
                        break;
                    }
              }
            // variable name is found
            fFound = 0;
            Vec_PtrForEachEntry( char *, vVarNames, pName, v )
                if ( strncmp(pTemp, pName, i) == 0 && strlen(pName) == (unsigned)i )
                {
                    pTemp += i-1;
                    fFound = 1;
                    break;
                }
            if ( !fFound )
            { 
                fprintf( pOutput, "Amap_ParseFormula(): The parser cannot find var \"%s\" in the input var list.\n", pTemp ); 
                Flag = AMAP_EQN_FLAG_ERROR; 
                break; 
            }
/*
            if ( Flag == AMAP_EQN_FLAG_VAR )
            {
                fprintf( pOutput, "Amap_ParseFormula(): The variable name \"%s\" follows another var without operation sign.\n", pTemp ); 
                Flag = AMAP_EQN_FLAG_ERROR; 
                break; 
            }
*/
            if ( Flag == AMAP_EQN_FLAG_VAR )
                Vec_IntPush( pStackOp, AMAP_EQN_OPER_AND );

            Vec_PtrPush( pStackFn, Hop_IthVar( pMan, v ) ); // Cudd_Ref( pbVars[v] );
            Flag = AMAP_EQN_FLAG_VAR; 
            break;
        }

        if ( Flag == AMAP_EQN_FLAG_ERROR )
            break;      // error exit
        else if ( Flag == AMAP_EQN_FLAG_START )
            continue;  //  go on parsing
        else if ( Flag == AMAP_EQN_FLAG_VAR )
            while ( 1 )
            {  // check if there are negations in the OpStack     
                if ( Vec_IntSize( pStackOp ) == 0 )
                    break;
                Oper = Vec_IntPop( pStackOp );
                if ( Oper != AMAP_EQN_OPER_NEG )
                {
                    Vec_IntPush( pStackOp, Oper );
                    break;
                }
                else
                {
                      Vec_PtrPush( pStackFn, Hop_Not((Hop_Obj_t *)Vec_PtrPop(pStackFn)) );
                }
            }
        else // if ( Flag == AMAP_EQN_FLAG_OPER )
            while ( 1 )
            {  // execute all the operations in the OpStack
               // with precedence higher or equal than the last one
                Oper1 = Vec_IntPop( pStackOp ); // the last operation
                if ( Vec_IntSize( pStackOp ) == 0 ) 
                {  // if it is the only operation, push it back
                    Vec_IntPush( pStackOp, Oper1 );
                    break;
                }
                Oper2 = Vec_IntPop( pStackOp ); // the operation before the last one
                if ( Oper2 >= Oper1 )  
                {  // if Oper2 precedence is higher or equal, execute it
                    if ( Amap_ParseFormulaOper( pMan, pStackFn, Oper2 ) == NULL )
                    {
                        fprintf( pOutput, "Amap_ParseFormula(): Unknown operation\n" );
                        ABC_FREE( pFormula );
                        Vec_PtrFreeP( &pStackFn );
                        Vec_IntFreeP( &pStackOp );
                        return NULL;
                    }
                    Vec_IntPush( pStackOp,  Oper1 );     // push the last operation back
                }
                else
                {  // if Oper2 precedence is lower, push them back and done
                    Vec_IntPush( pStackOp, Oper2 );
                    Vec_IntPush( pStackOp, Oper1 );
                    break;
                }
            }
    }

    if ( Flag != AMAP_EQN_FLAG_ERROR )
    {
        if ( Vec_PtrSize(pStackFn) != 0 )
        {    
            gFunc = (Hop_Obj_t *)Vec_PtrPop(pStackFn);
            if ( Vec_PtrSize(pStackFn) == 0 )
                if ( Vec_IntSize( pStackOp ) == 0 )
                {
//                    Cudd_Deref( gFunc );
                    ABC_FREE( pFormula );
                    Vec_PtrFreeP( &pStackFn );
                    Vec_IntFreeP( &pStackOp );
                    return gFunc;
                }
                else
                    fprintf( pOutput, "Amap_ParseFormula(): Something is left in the operation stack\n" );
            else
                fprintf( pOutput, "Amap_ParseFormula(): Something is left in the function stack\n" );
        }
        else
            fprintf( pOutput, "Amap_ParseFormula(): The input string is empty\n" );
    }
    ABC_FREE( pFormula );
    Vec_PtrFreeP( &pStackFn );
    Vec_IntFreeP( &pStackOp );
    return NULL;
}

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

  Synopsis    [Parses equations for the gates.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
int Amap_LibParseEquations( Amap_Lib_t * p, int fVerbose )
{
//    extern int Kit_TruthSupportSize( unsigned * pTruth, int nVars );
    Hop_Man_t * pMan;
    Hop_Obj_t * pObj;
    Vec_Ptr_t * vNames;
    Vec_Int_t * vTruth;
    Amap_Gat_t * pGate;
    Amap_Pin_t * pPin;
    unsigned * pTruth;
    int i, nPinMax;
    nPinMax = Amap_LibNumPinsMax(p);
    if ( nPinMax > AMAP_MAXINS )
        printf( "Gates with more than %d inputs will be ignored.\n", AMAP_MAXINS );
    vTruth = Vec_IntAlloc( 1 << 16 );
    vNames = Vec_PtrAlloc( 100 );
    pMan = Hop_ManStart();
    Hop_IthVar( pMan, nPinMax - 1 );
    Vec_PtrForEachEntry( Amap_Gat_t *, p->vGates, pGate, i )
    {
        if ( pGate->nPins == 0 )
        {
            pGate->pFunc = (unsigned *)Aig_MmFlexEntryFetch( p->pMemGates, 4 );
            if ( strcmp( pGate->pForm, AMAP_STRING_CONST0 ) == 0 )
                pGate->pFunc[0] = 0;
            else if ( strcmp( pGate->pForm, AMAP_STRING_CONST1 ) == 0 )
                pGate->pFunc[0] = ~0;
            else
            {
                printf( "Cannot parse formula \"%s\" of gate \"%s\" with no pins.\n", pGate->pForm, pGate->pName );
                break;
            }
            continue;
        }
        if ( pGate->nPins > AMAP_MAXINS )
            continue;
        Vec_PtrClear( vNames );
        Amap_GateForEachPin( pGate, pPin )
            Vec_PtrPush( vNames, pPin->pName );
        pObj = Amap_ParseFormula( stdout, pGate->pForm, vNames, pMan );
        if ( pObj == NULL )
            break;
        pTruth = Hop_ManConvertAigToTruth( pMan, pObj, pGate->nPins, vTruth, 0 );
        if ( Kit_TruthSupportSize(pTruth, pGate->nPins) < (int)pGate->nPins )
        {
            if ( fVerbose )
                printf( "Skipping gate \"%s\" because its output \"%s\" does not depend on all input variables.\n", pGate->pName, pGate->pForm );
            continue;
        }
        pGate->pFunc = (unsigned *)Aig_MmFlexEntryFetch( p->pMemGates, sizeof(unsigned)*Abc_TruthWordNum(pGate->nPins) );
        memcpy( pGate->pFunc, pTruth, sizeof(unsigned)*Abc_TruthWordNum(pGate->nPins) );
    }
    Vec_PtrFree( vNames );
    Vec_IntFree( vTruth );
    Hop_ManStop( pMan );
    return i == Vec_PtrSize(p->vGates);
}

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

  Synopsis    [Parses equations for the gates.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
void Amap_LibParseTest( char * pFileName )
{
    int fVerbose = 0;
    Amap_Lib_t * p;
    abctime clk = Abc_Clock();
    p = Amap_LibReadFile( pFileName, fVerbose );
    if ( p == NULL )
        return;
    Amap_LibParseEquations( p, fVerbose );
    Amap_LibFree( p );
    ABC_PRT( "Total time", Abc_Clock() - clk );
}

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


ABC_NAMESPACE_IMPL_END