Adding new command &sopb for resource-aware SOP balancing.

1 files changed, 230 insertions, 0 deletions

diff --git a/src/aig/gia/giaSopb.c b/src/aig/gia/giaSopb.c
new file mode 100644
index 00000000..28e01c8c
--- /dev/null
+++ b/src/aig/gia/giaSopb.c
@@ -0,0 +1,230 @@
+/**CFile****************************************************************
+
+  FileName    [giaSopb.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Scalable AIG package.]
+
+  Synopsis    [SOP balancing for a window.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: giaSopb.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "gia.h"
+
+ABC_NAMESPACE_IMPL_START
+
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_ManHighlight_rec( Gia_Man_t * p, int iObj )
+{
+    Gia_Obj_t * pObj;
+    if ( Gia_ObjIsTravIdCurrentId(p, iObj) )
+        return;
+    Gia_ObjSetTravIdCurrentId(p, iObj);
+    pObj = Gia_ManObj( p, iObj );
+    if ( Gia_ObjIsAnd(pObj) )
+        Gia_ManHighlight_rec( p, Gia_ObjFaninId0(pObj, iObj) );
+    if ( Gia_ObjIsAnd(pObj) )
+        Gia_ManHighlight_rec( p, Gia_ObjFaninId1(pObj, iObj) );
+}
+void Gia_ManPrepareWin( Gia_Man_t * p, Vec_Int_t * vOuts, Vec_Int_t ** pvPis, Vec_Int_t ** pvPos, Vec_Int_t ** pvAnds )
+{
+    Gia_Obj_t * pObj;
+    int i;
+    // mark the section
+    Gia_ManIncrementTravId( p );
+    Gia_ManForEachCoVec( vOuts, p, pObj, i )
+        Gia_ManHighlight_rec( p, Gia_ObjFaninId0p(p, pObj) );
+    // mark fanins of the outside area
+    Gia_ManCleanMark0( p );
+    Gia_ManForEachObj1( p, pObj, i )
+    {
+        if ( Gia_ObjIsCi(pObj) )
+            continue;
+        if ( Gia_ObjIsAnd(pObj) && !Gia_ObjIsTravIdCurrentId(p, i) )
+            continue;
+        Gia_ObjFanin0(pObj)->fMark0 = 1;
+        if ( Gia_ObjIsAnd(pObj) )
+            Gia_ObjFanin1(pObj)->fMark0 = 1;
+    }
+    // collect pointed nodes
+    *pvPis  = Vec_IntAlloc( 1000 );
+    *pvPos  = Vec_IntAlloc( 1000 );
+    *pvAnds = Vec_IntAlloc( 1000 );
+    Gia_ManForEachObj1( p, pObj, i )
+    {
+        if ( !Gia_ObjIsTravIdCurrentId(p, i) )
+            continue;
+        if ( Gia_ObjIsCi(pObj) )
+            Vec_IntPush( *pvPis, i );
+        else if ( pObj->fMark0 )
+            Vec_IntPush( *pvPos, i );
+        if ( Gia_ObjIsAnd(pObj) )
+            Vec_IntPush( *pvAnds, i );
+    }
+    Gia_ManCleanMark0( p );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManExtractWin( Gia_Man_t * p, Vec_Int_t * vOuts )
+{
+    Vec_Int_t * vPis, * vPos, * vAnds;
+    Gia_Man_t * pNew;
+    Gia_Obj_t * pObj;
+    int i;
+    Gia_ManPrepareWin( p, vOuts, &vPis, &vPos, &vAnds );
+    // create AIG
+    pNew = Gia_ManStart( Vec_IntSize(vPis) + Vec_IntSize(vPos) + Vec_IntSize(vAnds) + 1 );
+    pNew->pName = Abc_UtilStrsav( p->pName );
+    Gia_ManConst0(p)->Value = 0;
+    Gia_ManForEachObjVec( vPis, p, pObj, i )
+        pObj->Value = Gia_ManAppendCi( pNew );
+    Gia_ManForEachObjVec( vAnds, p, pObj, i )
+        pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+    Gia_ManForEachObjVec( vPos, p, pObj, i )
+        Gia_ManAppendCo( pNew, pObj->Value );
+    Vec_IntFree( vPis );
+    Vec_IntFree( vPos );
+    Vec_IntFree( vAnds );
+    return pNew;
+}
+Gia_Man_t * Gia_ManInsertWin( Gia_Man_t * p, Vec_Int_t * vOuts, Gia_Man_t * pWin )
+{
+    Vec_Int_t * vPos, * vPis, * vAnds;
+    Gia_Man_t * pNew, * pTemp;
+    Gia_Obj_t * pObj;
+    int i;
+    Gia_ManPrepareWin( p, vOuts, &vPis, &vPos, &vAnds );
+    // create AIG
+    pNew = Gia_ManStart( Gia_ManObjNum(p) - Vec_IntSize(vAnds) + Gia_ManAndNum(pWin) );
+    pNew->pName = Abc_UtilStrsav( p->pName );
+    pNew->pSpec = Abc_UtilStrsav( p->pSpec );
+    // inputs
+    Gia_ManConst0(p)->Value = 0;
+    Gia_ManForEachCi( p, pObj, i )
+        pObj->Value = Gia_ManAppendCi( pNew );
+    Gia_ManConst0(pWin)->Value = 0;
+    Gia_ManForEachCi( pWin, pObj, i )
+        pObj->Value = Gia_ManObj(p, Vec_IntEntry(vPis, i))->Value;
+    // internal nodes
+    Gia_ManHashAlloc( pNew );
+    Gia_ManForEachAnd( pWin, pObj, i )
+        pObj->Value = Gia_ManHashAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+    Gia_ManForEachCo( pWin, pObj, i )
+        Gia_ManObj( p, Vec_IntEntry(vPos, i) )->Value = Gia_ObjFanin0Copy(pObj);
+    Gia_ManForEachAnd( p, pObj, i )
+        if ( !Gia_ObjIsTravIdCurrentId(p, i) )
+            pObj->Value = Gia_ManHashAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+    Gia_ManForEachCo( p, pObj, i )
+        Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
+    Gia_ManHashStop( pNew );
+    // cleanup
+    Vec_IntFree( vPis );
+    Vec_IntFree( vPos );
+    Vec_IntFree( vAnds );
+    pNew = Gia_ManCleanup( pTemp = pNew );
+    Gia_ManStop( pTemp );
+    return pNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Vec_Int_t * Gia_ManFindLatest( Gia_Man_t * p, int LevelMax )
+{
+    Vec_Int_t * vOuts;
+    Gia_Obj_t * pObj;
+    int i;
+    vOuts = Vec_IntAlloc( 1000 );
+    Gia_ManForEachCo( p, pObj, i )
+        if ( Gia_ObjLevel(p, pObj) > LevelMax )
+            Vec_IntPush( vOuts, i );
+    return vOuts;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManPerformSopBalanceWin( Gia_Man_t * p, int LevelMax, int nLevelRatio, int nCutNum, int nRelaxRatio, int fVerbose )
+{
+    Vec_Int_t * vOuts;
+    Gia_Man_t * pNew, * pWin, * pWinNew;
+    int nLevels = Gia_ManLevelNum( p );
+    if ( nLevelRatio )
+        LevelMax = (int)((1.0 - 0.01 * nLevelRatio) * nLevels);
+//printf( "Using LevelMax = %d.\n", LevelMax );
+    vOuts = Gia_ManFindLatest( p, LevelMax );
+    if ( Vec_IntSize(vOuts) == 0 )
+    {
+        Vec_IntFree( vOuts );
+        return Gia_ManDup( p );
+    }
+    pWin = Gia_ManExtractWin( p, vOuts );
+    pWinNew = Gia_ManPerformSopBalance( pWin, nCutNum, nRelaxRatio, fVerbose );
+    Gia_ManStop( pWin );
+    pNew = Gia_ManInsertWin( p, vOuts, pWinNew );
+    Gia_ManStop( pWinNew );
+    Vec_IntFree( vOuts );
+    return pNew;
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+
+ABC_NAMESPACE_IMPL_END
+