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-rw-r--r--src/base/abci/abcExact.c126
1 files changed, 104 insertions, 22 deletions
diff --git a/src/base/abci/abcExact.c b/src/base/abci/abcExact.c
index b3d9a53d..6cf03547 100644
--- a/src/base/abci/abcExact.c
+++ b/src/base/abci/abcExact.c
@@ -88,6 +88,8 @@ struct Ses_Man_t_
int nSelectOffset; /* offset where select variables start */
int nDepthOffset; /* offset where depth variables start */
+ int fHitResLimit; /* SAT solver gave up due to resource limit */
+
abctime timeSat; /* SAT runtime */
abctime timeSatSat; /* SAT runtime (sat instance) */
abctime timeSatUnsat; /* SAT runtime (unsat instance) */
@@ -134,9 +136,21 @@ struct Ses_Store_t_
int nValidEntriesCount; /* number of entries with network */
Ses_TruthEntry_t * pEntries[SES_STORE_TABLE_SIZE]; /* hash table for truth table entries */
- unsigned long nCutCount;
- unsigned long pCutCount[9];
- unsigned long nCacheHit;
+ /* statistics */
+ unsigned long nCutCount; /* number of cuts investigated */
+ unsigned long pCutCount[9]; /* -> per cut size */
+ unsigned long nUnsynthesizedImp; /* number of cuts which couldn't be optimized at all, opt. stopped because of imp. constraints */
+ unsigned long pUnsynthesizedImp[9]; /* -> per cut size */
+ unsigned long nUnsynthesizedRL; /* number of cuts which couldn't be optimized at all, opt. stopped because of resource limits */
+ unsigned long pUnsynthesizedRL[9]; /* -> per cut size */
+ unsigned long nSynthesizedTrivial; /* number of cuts which could be synthesized trivially (n < 2) */
+ unsigned long pSynthesizedTrivial[9]; /* -> per cut size */
+ unsigned long nSynthesizedImp; /* number of cuts which could be synthesized, opt. stopped because of imp. constraints */
+ unsigned long pSynthesizedImp[9]; /* -> per cut size */
+ unsigned long nSynthesizedRL; /* number of cuts which could be synthesized, opt. stopped because of resource limits */
+ unsigned long pSynthesizedRL[9]; /* -> per cut size */
+ unsigned long nCacheHits; /* number of cache hits */
+ unsigned long pCacheHits[9]; /* -> per cut size */
};
static Ses_Store_t * s_pSesStore = NULL;
@@ -180,16 +194,11 @@ static inline void Abc_UnnormalizeArrivalTimes( int * pArrTimeProfile, int nVars
static inline Ses_Store_t * Ses_StoreAlloc( int nBTLimit, int fMakeAIG, int fVerbose )
{
Ses_Store_t * pStore = ABC_CALLOC( Ses_Store_t, 1 );
- pStore->fMakeAIG = fMakeAIG;
- pStore->fVerbose = fVerbose;
- pStore->nBTLimit = nBTLimit;
- pStore->nEntriesCount = 0;
+ pStore->fMakeAIG = fMakeAIG;
+ pStore->fVerbose = fVerbose;
+ pStore->nBTLimit = nBTLimit;
memset( pStore->pEntries, 0, SES_STORE_TABLE_SIZE );
- pStore->nCutCount = 0;
- memset( pStore->pCutCount, 0, 9 );
- pStore->nCacheHit = 0;
-
return pStore;
}
@@ -325,8 +334,11 @@ int Ses_StoreAddEntry( Ses_Store_t * pStore, word * pTruth, int nVars, int * pAr
pStore->nValidEntriesCount++;
}
else
+ {
+ assert( 0 );
/* item was already present */
fAdded = 0;
+ }
return fAdded;
}
@@ -1242,6 +1254,9 @@ static int Ses_ManFindMinimumSize( Ses_Man_t * pSes )
{
int nGates = 0;
+ /* store whether call was unsuccessful due to resource limit and not due to impossible constraint */
+ pSes->fHitResLimit = 0;
+
while ( true )
{
++nGates;
@@ -1256,12 +1271,14 @@ static int Ses_ManFindMinimumSize( Ses_Man_t * pSes )
Ses_ManCreateVars( pSes, nGates );
if ( !Ses_ManCreateClauses( pSes ) )
- return 0; /* proven UNSAT while creating clauses */
+ continue; /* proven UNSAT while creating clauses */
switch ( Ses_ManSolve( pSes ) )
{
case 1: return 1; /* SAT */
- case 2: return 0; /* resource limit */
+ case 2:
+ pSes->fHitResLimit = 1;
+ return 0; /* resource limit */
}
}
@@ -1512,13 +1529,41 @@ void Abc_ExactStats()
return;
}
+ printf( "-------------------------------------------------------------------------------------------------------------------------------\n" );
+ printf( " 0 1 2 3 4 5 6 7 8 total\n" );
+ printf( "-------------------------------------------------------------------------------------------------------------------------------\n" );
printf( "number of considered cuts :" );
- for ( i = 2; i < 9; ++i )
- printf( " %d = %lu ", i, s_pSesStore->pCutCount[i] );
- printf( " total = %lu\n", s_pSesStore->nCutCount );
- printf( "cache hits : %lu\n", s_pSesStore->nCacheHit );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pCutCount[i] );
+ printf( "%10lu\n", s_pSesStore->nCutCount );
+ printf( " - trivial :" );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pSynthesizedTrivial[i] );
+ printf( "%10lu\n", s_pSesStore->nSynthesizedTrivial );
+ printf( " - synth (imp) :" );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pSynthesizedImp[i] );
+ printf( "%10lu\n", s_pSesStore->nSynthesizedImp );
+ printf( " - synth (res) :" );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pSynthesizedRL[i] );
+ printf( "%10lu\n", s_pSesStore->nSynthesizedRL );
+ printf( " - not synth (imp) :" );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pUnsynthesizedImp[i] );
+ printf( "%10lu\n", s_pSesStore->nUnsynthesizedImp );
+ printf( " - not synth (res) :" );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pUnsynthesizedRL[i] );
+ printf( "%10lu\n", s_pSesStore->nUnsynthesizedRL );
+ printf( " - cache hits :" );
+ for ( i = 0; i < 9; ++i )
+ printf( "%10lu", s_pSesStore->pCacheHits[i] );
+ printf( "%10lu\n", s_pSesStore->nCacheHits );
+ printf( "-------------------------------------------------------------------------------------------------------------------------------\n" );
printf( "number of entries : %d\n", s_pSesStore->nEntriesCount );
printf( "number of valid entries : %d\n", s_pSesStore->nValidEntriesCount );
+ printf( "number of invalid entries : %d\n", s_pSesStore->nEntriesCount - s_pSesStore->nValidEntriesCount );
}
// this procedure takes TT and input arrival times (pArrTimeProfile) and return the smallest output arrival time;
// it also returns the pin-to-pin delays (pPerm) between each cut leaf and the cut output and the cut area cost (Cost)
@@ -1538,14 +1583,24 @@ int Abc_ExactDelayCost( word * pTruth, int nVars, int * pArrTimeProfile, char *
assert( 0 );
}
+ /* statistics */
+ s_pSesStore->nCutCount++;
+ s_pSesStore->pCutCount[nVars]++;
+
if ( nVars == 0 )
{
+ s_pSesStore->nSynthesizedTrivial++;
+ s_pSesStore->pSynthesizedTrivial[0]++;
+
*Cost = 0;
return 0;
}
if ( nVars == 1 )
{
+ s_pSesStore->nSynthesizedTrivial++;
+ s_pSesStore->pSynthesizedTrivial[1]++;
+
*Cost = 0;
pPerm[0] = (char)0;
return pArrTimeProfile[0];
@@ -1563,17 +1618,15 @@ int Abc_ExactDelayCost( word * pTruth, int nVars, int * pArrTimeProfile, char *
printf( " at level %d\n", AigLevel );
}
- /* statistics */
- s_pSesStore->nCutCount++;
- s_pSesStore->pCutCount[nVars]++;
-
*Cost = ABC_INFINITY;
if ( Ses_StoreGetEntry( s_pSesStore, pTruth, nVars, pArrTimeProfile, &pSol ) )
{
if ( s_pSesStore->fVeryVerbose )
printf( " truth table already in store\n" );
- s_pSesStore->nCacheHit++;
+
+ s_pSesStore->nCacheHits++;
+ s_pSesStore->pCacheHits[nVars]++;
}
else
{
@@ -1613,6 +1666,33 @@ int Abc_ExactDelayCost( word * pTruth, int nVars, int * pArrTimeProfile, char *
}
}
+ if ( pSol )
+ {
+ if ( pSes->fHitResLimit )
+ {
+ s_pSesStore->nSynthesizedRL++;
+ s_pSesStore->pSynthesizedRL[nVars]++;
+ }
+ else
+ {
+ s_pSesStore->nSynthesizedImp++;
+ s_pSesStore->pSynthesizedImp[nVars]++;
+ }
+ }
+ else
+ {
+ if ( pSes->fHitResLimit )
+ {
+ s_pSesStore->nUnsynthesizedRL++;
+ s_pSesStore->pUnsynthesizedRL[nVars]++;
+ }
+ else
+ {
+ s_pSesStore->nUnsynthesizedImp++;
+ s_pSesStore->pUnsynthesizedImp[nVars]++;
+ }
+ }
+
pSes->timeTotal = Abc_Clock() - timeStart;
/* cleanup */
@@ -1685,6 +1765,7 @@ Abc_Obj_t * Abc_ExactBuildNode( word * pTruth, int nVars, int * pArrTimeProfile,
/* primary inputs */
for ( i = 0; i < nVars; ++i )
{
+ assert( pFanins[i] );
Vec_PtrPush( pGates, pFanins[i] );
}
@@ -1707,6 +1788,7 @@ Abc_Obj_t * Abc_ExactBuildNode( word * pTruth, int nVars, int * pArrTimeProfile,
pSopCover = Abc_SopFromTruthBin( pGateTruth );
pObj = Abc_NtkCreateNode( pNtk );
+ assert( pObj );
pObj->pData = Abc_SopRegister( (Mem_Flex_t*)pNtk->pManFunc, pSopCover );
Vec_PtrPush( pGates, pObj );
ABC_FREE( pSopCover );
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-30 11:57:43 +0000