Improving DAG-aware unmapping.

2 files changed, 166 insertions, 0 deletions

diff --git a/src/aig/gia/giaShrink7.c b/src/aig/gia/giaShrink7.c
new file mode 100644
index 00000000..1747a79e
--- /dev/null
+++ b/src/aig/gia/giaShrink7.c
@@ -0,0 +1,165 @@
+/**CFile****************************************************************
+
+  FileName    [giaShrink7.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Scalable AIG package.]
+
+  Synopsis    [Implementation of DAG-aware unmapping for 6-input cuts.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: giaShrink6.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "gia.h"
+#include "misc/vec/vecHsh4.h"
+#include "misc/util/utilTruth.h"
+
+
+ABC_NAMESPACE_IMPL_START
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+// operation manager
+typedef struct Unm_Man_t_ Unm_Man_t;
+struct Unm_Man_t_
+{
+    Gia_Man_t *        pGia;           // user's AIG
+    Gia_Man_t *        pNew;           // constructed AIG
+    Hsh_Int4Man_t *    pHash;          // hash table
+    int                nNewSize;       // expected size of new manager
+    Vec_Wrd_t *        vTruths;        // truth tables
+    Vec_Int_t *        vLeaves;        // temporary storage for leaves
+    abctime            clkStart;       // starting the clock
+};
+
+extern word Shr_ManComputeTruth6( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Int_t * vLeaves, Vec_Wrd_t * vTruths );
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Unm_Man_t * Unm_ManAlloc( Gia_Man_t * pGia )
+{
+    Unm_Man_t * p;
+    p = ABC_CALLOC( Unm_Man_t, 1 );
+    p->clkStart    = Abc_Clock();
+    p->nNewSize    = 3 * Gia_ManObjNum(pGia) / 2;
+    p->pGia        = pGia;
+    p->pNew        = Gia_ManStart( p->nNewSize );
+    p->pNew->pName = Abc_UtilStrsav( pGia->pName );
+    p->pNew->pSpec = Abc_UtilStrsav( pGia->pSpec );
+    Gia_ManHashAlloc( p->pNew );
+    Gia_ManCleanLevels( p->pNew, p->nNewSize );
+    // allocate traversal IDs
+    p->pNew->nObjs = p->nNewSize;
+    Gia_ManIncrementTravId( p->pNew );
+    p->pNew->nObjs = 1;
+    // start hashing
+    p->pHash = Hsh_Int4ManStart( 10 );
+    // truth tables
+    p->vTruths = Vec_WrdStart( Gia_ManObjNum(pGia) );
+    p->vLeaves = Vec_IntStart( 10 );
+    return p;
+}
+Gia_Man_t * Unm_ManFree( Unm_Man_t * p )
+{
+    Gia_Man_t * pTemp = p->pNew; p->pNew = NULL;
+    Gia_ManHashStop( pTemp );
+    Vec_IntFreeP( &pTemp->vLevels );
+    Gia_ManSetRegNum( pTemp, Gia_ManRegNum(p->pGia) );
+    // truth tables
+    Vec_WrdFreeP( &p->vTruths );
+    Vec_IntFreeP( &p->vLeaves );
+    // free data structures
+    Hsh_Int4ManStop( p->pHash );
+    ABC_FREE( p );
+
+    Gia_ManStop( pTemp );
+    pTemp = NULL;
+
+    return pTemp;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Unm_ManComputeTruths( Unm_Man_t * p )
+{
+    Vec_Wrd_t * vTruths2;
+    Gia_Obj_t * pObj;
+    int i, k, iNode;
+    word uTruth;
+    vTruths2 = Vec_WrdStart( Gia_ManObjNum(p->pGia) );
+    Gia_ManForEachLut( p->pGia, i )
+    {
+        pObj = Gia_ManObj( p->pGia, i );
+        // collect leaves of this gate  
+        Vec_IntClear( p->vLeaves );
+        Gia_LutForEachFanin( p->pGia, i, iNode, k )
+            Vec_IntPush( p->vLeaves, iNode );
+        assert( Vec_IntSize(p->vLeaves) <= 6 );
+        // compute truth table 
+        uTruth = Shr_ManComputeTruth6( p->pGia, pObj, p->vLeaves, vTruths2 );
+        Vec_WrdWriteEntry( p->vTruths, i, uTruth );
+        if ( i % 100 == 0 )
+            Kit_DsdPrintFromTruth( (unsigned *)&uTruth, 6 ), printf( "\n" );
+    }
+    Vec_WrdFreeP( &vTruths2 );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Unm_ManTest( Gia_Man_t * pGia )
+{
+    Unm_Man_t * p;
+    p = Unm_ManAlloc( pGia );
+    Unm_ManComputeTruths( p );
+    Abc_PrintTime( 1, "Time", Abc_Clock() - p->clkStart );
+    return Unm_ManFree( p );
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+
diff --git a/src/aig/gia/module.make b/src/aig/gia/module.make
index 37e4bccb..e28c9ad1 100644
--- a/src/aig/gia/module.make
+++ b/src/aig/gia/module.make
@@ -36,6 +36,7 @@ SRC +=    src/aig/gia/giaAig.c \
     src/aig/gia/giaScl.c \
     src/aig/gia/giaShrink.c \
     src/aig/gia/giaShrink6.c \
+    src/aig/gia/giaShrink7.c \
     src/aig/gia/giaSim.c \
     src/aig/gia/giaSim2.c \
     src/aig/gia/giaSort.c \