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Commit 596bbbe6 by Alan Mishchenko
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Added QuickSort based on 3-way partitioning.

parent 9aab58f6
Showing with 16 additions and 224 deletions
src/aig/gia/giaIso.c
......@@ -137,222 +137,6 @@ static inline void Gia_IsoSetItem( Gia_IsoMan_t * p, int i, unsigned v ) {
/**Function*************************************************************
Synopsis [QuickSort algorithm as implemented by qsort().]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_QuickSortCompare( word * p1, word * p2 )
{
if ( (unsigned)(*p1) < (unsigned)(*p2) )
return -1;
if ( (unsigned)(*p1) > (unsigned)(*p2) )
return 1;
return 0;
}
void Abc_QuickSort1( word * pData, int nSize )
{
int i, fVerify = 0;
qsort( (void *)pData, nSize, sizeof(word), (int (*)(const void *, const void *))Abc_QuickSortCompare );
if ( fVerify )
for ( i = 1; i < nSize; i++ )
assert( (unsigned)pData[i-1] <= (unsigned)pData[i] );
}
/**Function*************************************************************
Synopsis [QuickSort algorithm based on 2/3-way partitioning.]
Description [This code is based on the online presentation
"QuickSort is Optimal" by Robert Sedgewick and Jon Bentley.
http://www.sorting-algorithms.com/static/QuicksortIsOptimal.pdf
The first 32-bits of the input data contain values to be compared.
The last 32-bits contain the user's data. When sorting is finished,
the 64-bit words are ordered in the increasing order of their value ]
SideEffects []
SeeAlso []
***********************************************************************/
#define ABC_SWAP(Type, a, b) { Type t = a; a = b; b = t; }
static inline void Iso_SelectSort( word * pData, int nSize )
{
int i, j, best_i;
for ( i = 0; i < nSize-1; i++ )
{
best_i = i;
for ( j = i+1; j < nSize; j++ )
if ( (unsigned)pData[j] < (unsigned)pData[best_i] )
best_i = j;
ABC_SWAP( word, pData[i], pData[best_i] );
}
}
void Abc_QuickSort2_rec( word * pData, int l, int r )
{
word v = pData[r];
int i = l-1, j = r;
if ( l >= r )
return;
assert( l < r );
if ( r - l < 10 )
{
Iso_SelectSort( pData + l, r - l + 1 );
return;
}
while ( 1 )
{
while ( (unsigned)pData[++i] < (unsigned)v );
while ( (unsigned)v < (unsigned)pData[--j] )
if ( j == l )
break;
if ( i >= j )
break;
ABC_SWAP( word, pData[i], pData[j] );
}
ABC_SWAP( word, pData[i], pData[r] );
Abc_QuickSort2_rec( pData, l, i-1 );
Abc_QuickSort2_rec( pData, i+1, r );
}
void Abc_QuickSort3_rec( word * pData, int l, int r )
{
word v = pData[r];
int k, i = l-1, j = r, p = l-1, q = r;
if ( l >= r )
return;
assert( l < r );
if ( r - l < 10 )
{
Iso_SelectSort( pData + l, r - l + 1 );
return;
}
while ( 1 )
{
while ( (unsigned)pData[++i] < (unsigned)v );
while ( (unsigned)v < (unsigned)pData[--j] )
if ( j == l )
break;
if ( i >= j )
break;
ABC_SWAP( word, pData[i], pData[j] );
if ( (unsigned)pData[i] == (unsigned)v )
{ p++; ABC_SWAP( word, pData[p], pData[i] ); }
if ( (unsigned)v == (unsigned)pData[j] )
{ q--; ABC_SWAP( word, pData[j], pData[q] ); }
}
ABC_SWAP( word, pData[i], pData[r] );
j = i-1; i = i+1;
for ( k = l; k < p; k++, j-- )
ABC_SWAP( word, pData[k], pData[j] );
for ( k = r-1; k > q; k--, i++ )
ABC_SWAP( word, pData[i], pData[k] );
Abc_QuickSort3_rec( pData, l, j );
Abc_QuickSort3_rec( pData, i, r );
}
void Abc_QuickSort2( word * pData, int nSize )
{
int i, fVerify = 0;
Abc_QuickSort2_rec( pData, 0, nSize - 1 );
if ( fVerify )
for ( i = 1; i < nSize; i++ )
assert( (unsigned)pData[i-1] <= (unsigned)pData[i] );
}
void Abc_QuickSort3( word * pData, int nSize )
{
int i, fVerify = 0;
Abc_QuickSort3_rec( pData, 0, nSize - 1 );
if ( fVerify )
for ( i = 1; i < nSize; i++ )
assert( (unsigned)pData[i-1] <= (unsigned)pData[i] );
}
/**Function*************************************************************
Synopsis [Wrapper around QuickSort to sort entries based on cost.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_QuickSortCostData( int * pCosts, int nSize, word * pData, int * pResult )
{
int i;
for ( i = 0; i < nSize; i++ )
pData[i] = ((word)i << 32) | pCosts[i];
Abc_QuickSort3( pData, nSize );
for ( i = 0; i < nSize; i++ )
pResult[i] = (int)(pData[i] >> 32);
}
int * Abc_QuickSortCost( int * pCosts, int nSize )
{
word * pData = ABC_ALLOC( word, nSize );
int * pResult = ABC_ALLOC( int, nSize );
Abc_QuickSortCostData( pCosts, nSize, pData, pResult );
ABC_FREE( pData );
return pResult;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_QuickSortTest()
{
int nSize = 10000000;
int fVerbose = 0;
word * pData1, * pData2;
int i, clk = clock();
// generate numbers
pData1 = ABC_ALLOC( word, nSize );
pData2 = ABC_ALLOC( word, nSize );
srand( 1111 );
for ( i = 0; i < nSize; i++ )
pData2[i] = pData1[i] = ((word)i << 32) | rand();
Abc_PrintTime( 1, "Prepare ", clock() - clk );
// perform sorting
clk = clock();
Abc_QuickSort3( pData1, nSize );
Abc_PrintTime( 1, "Sort new", clock() - clk );
// print the result
if ( fVerbose )
{
for ( i = 0; i < nSize; i++ )
printf( "(%d,%d) ", (int)(pData1[i] >> 32), (int)pData1[i] );
printf( "\n" );
}
// create new numbers
clk = clock();
Abc_QuickSort1( pData2, nSize );
Abc_PrintTime( 1, "Sort old", clock() - clk );
// print the result
if ( fVerbose )
{
for ( i = 0; i < nSize; i++ )
printf( "(%d,%d) ", (int)(pData2[i] >> 32), (int)pData2[i] );
printf( "\n" );
}
ABC_FREE( pData1 );
ABC_FREE( pData2 );
}
/**Function*************************************************************
Synopsis []
Description []
......@@ -619,7 +403,7 @@ void Gia_IsoSort( Gia_IsoMan_t * p )
}
// sort objects
clk = clock();
Abc_QuickSort3( p->pStoreW + iBegin, nSize );
Abc_QuickSort3( p->pStoreW + iBegin, nSize, 0 );
p->timeSort += clock() - clk;
// divide into new classes
iBeginOld = iBegin;
......
src/aig/saig/saigAbsCba.c
......@@ -113,7 +113,7 @@ Vec_Int_t * Saig_ManCbaFilterFlops( Aig_Man_t * pAig, Abc_Cex_t * pAbsCex, Vec_I
Vec_IntForEachEntry( vAbsFfsToAdd, Entry, i )
Vec_IntPush( vFlopAddCosts, -Vec_IntEntry(vFlopCosts, Entry) );
// sort the flops
pPerm = Abc_SortCost( Vec_IntArray(vFlopAddCosts), Vec_IntSize(vFlopAddCosts) );
pPerm = Abc_MergeSortCost( Vec_IntArray(vFlopAddCosts), Vec_IntSize(vFlopAddCosts) );
// shrink the array
vFfsToAddBest = Vec_IntAlloc( nFfsToSelect );
for ( i = 0; i < nFfsToSelect; i++ )
......
src/aig/saig/saigIsoFast.c
......@@ -219,7 +219,7 @@ Vec_Int_t * Iso_StoCollectInfo( Iso_Sto_t * p, Aig_Obj_t * pPo )
// printf( "%d ", Vec_IntSize(p->vVisited) );
// sort the costs in the increasing order
pPerm = Abc_SortCost( Vec_IntArray(p->vVisited), Vec_IntSize(p->vVisited) );
pPerm = Abc_MergeSortCost( Vec_IntArray(p->vVisited), Vec_IntSize(p->vVisited) );
assert( Vec_IntEntry(p->vVisited, pPerm[0]) <= Vec_IntEntry(p->vVisited, pPerm[Vec_IntSize(p->vVisited)-1]) );
// create information
......
src/bool/bdc/bdcSpfd.c
......@@ -299,7 +299,7 @@ Bdc_SpfdPrint( pNode + i, 1, vLevels, Truth );
goto cleanup;
}
}
pPerm = Abc_SortCost( Vec_IntArray(vWeight), c );
pPerm = Abc_MergeSortCost( Vec_IntArray(vWeight), c );
assert( Vec_IntEntry(vWeight, pPerm[0]) <= Vec_IntEntry(vWeight, pPerm[c-1]) );
printf( "Best SPFD = %d.\n", Vec_IntEntry(vWeight, pPerm[c-1]) );
......
src/misc/util/abc_global.h
......@@ -198,6 +198,8 @@ typedef ABC_UINT64_T word;
#define ABC_INFINITY (100000000)
#define ABC_SWAP(Type, a, b) { Type t = a; a = b; b = t; }
#define ABC_PRT(a,t) (printf("%s = ", (a)), printf("%7.2f sec\n", (float)(t)/(float)(CLOCKS_PER_SEC)))
#define ABC_PRTr(a,t) (printf("%s = ", (a)), printf("%7.2f sec\r", (float)(t)/(float)(CLOCKS_PER_SEC)))
#define ABC_PRTn(a,t) (printf("%s = ", (a)), printf("%6.2f sec ", (float)(t)/(float)(CLOCKS_PER_SEC)))
......@@ -322,8 +324,14 @@ static inline int Abc_PrimeCudd( unsigned int p )
} // end of Cudd_Prime
extern void Abc_Sort( int * pInput, int nSize );
extern int * Abc_SortCost( int * pCosts, int nSize );
// sorting
extern void Abc_MergeSort( int * pInput, int nSize );
extern int * Abc_MergeSortCost( int * pCosts, int nSize );
extern void Abc_QuickSort1( word * pData, int nSize, int fDecrement );
extern void Abc_QuickSort2( word * pData, int nSize, int fDecrement );
extern void Abc_QuickSort3( word * pData, int nSize, int fDecrement );
extern void Abc_QuickSortCostData( int * pCosts, int nSize, int fDecrement, word * pData, int * pResult );
extern int * Abc_QuickSortCost( int * pCosts, int nSize, int fDecrement );
ABC_NAMESPACE_HEADER_END
......
src/sat/bsat/satProof.c
......@@ -155,7 +155,7 @@ Vec_Int_t * Proof_CollectUsedIter( Vec_Set_t * vProof, Vec_Int_t * vRoots, int f
Vec_IntFree( vStack );
// Abc_PrintTime( 1, "Iterative clause collection time", clock() - clk );
clk = clock();
Abc_Sort( Vec_IntArray(vUsed), Vec_IntSize(vUsed) );
Abc_MergeSort( Vec_IntArray(vUsed), Vec_IntSize(vUsed) );
// Abc_PrintTime( 1, "Postprocessing with sorting time", clock() - clk );
// verify topological order
if ( fVerify )
......
src/sat/bsat/satSolver2.c
......@@ -1416,7 +1416,7 @@ void sat_solver2_reducedb(sat_solver2* s)
// preserve 1/10 of most active clauses
pClaAct = veci_begin(&s->claActs) + 1;
nClaAct = veci_size(&s->claActs) - 1;
pPerm = Abc_SortCost( pClaAct, nClaAct );
pPerm = Abc_MergeSortCost( pClaAct, nClaAct );
assert( pClaAct[pPerm[0]] <= pClaAct[pPerm[nClaAct-1]] );
ActCutOff = pClaAct[pPerm[nClaAct*9/10]];
ABC_FREE( pPerm );
......
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