Command '&slice' to cut out the bottom part of the AIG.

src/aig/gia/gia.h

@@ -975,6 +975,7 @@ extern Gia_Man_t *         Gia_ManDupCones( Gia_Man_t * p, int * pPos, int nPos,
 extern Gia_Man_t *         Gia_ManDupOneHot( Gia_Man_t * p );
 extern Gia_Man_t *         Gia_ManDupLevelized( Gia_Man_t * p );
 extern Gia_Man_t *         Gia_ManDupFromVecs( Gia_Man_t * p, Vec_Int_t * vCis, Vec_Int_t * vAnds, Vec_Int_t * vCos, int nRegs );
+extern Gia_Man_t *         Gia_ManDupSliced( Gia_Man_t * p, int nSuppMax );
 /*=== giaEnable.c ==========================================================*/
 extern void                Gia_ManDetectSeqSignals( Gia_Man_t * p, int fSetReset, int fVerbose );
 extern Gia_Man_t *         Gia_ManUnrollAndCofactor( Gia_Man_t * p, int nFrames, int nFanMax, int fVerbose );

src/aig/gia/giaDup.c

@@ -2521,6 +2521,54 @@ Gia_Man_t * Gia_ManDupFromVecs( Gia_Man_t * p, Vec_Int_t * vCis, Vec_Int_t * vAn
     return pNew;
 }
 
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Gia_Man_t * Gia_ManDupSliced( Gia_Man_t * p, int nSuppMax )
+{
+    Gia_Man_t * pNew;
+    Gia_Obj_t * pObj;
+    int i;
+    // start the new manager
+    pNew = Gia_ManStart( 5000 );
+    pNew->pName = Abc_UtilStrsav( p->pName );
+    // create constant and PIs
+    Gia_ManConst0(p)->Value = 0;
+    Gia_ManForEachCi( p, pObj, i )
+        pObj->Value = Gia_ManAppendCi( pNew );
+    // create internal nodes
+    Gia_ManCleanMark01(p);
+    Gia_ManForEachAnd( p, pObj, i )
+        if ( Gia_ManSuppSize(p, &i, 1) <= nSuppMax )
+        {
+            pObj->Value = Gia_ManAppendAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
+            pObj->fMark0 = 1;
+        }
+        else 
+        {
+            Gia_ObjFanin0(pObj)->fMark1 = 1;
+            Gia_ObjFanin1(pObj)->fMark1 = 1;
+        }
+    Gia_ManForEachCo( p, pObj, i )
+        Gia_ObjFanin0(pObj)->fMark1 = 1;
+    // add POs for the nodes pointed to
+    Gia_ManForEachAnd( p, pObj, i )
+        if ( pObj->fMark0 && pObj->fMark1 )
+            Gia_ManAppendCo( pNew, pObj->Value );
+    // cleanup and leave
+    Gia_ManCleanMark01(p);
+    return pNew;
+}
+
+
 ////////////////////////////////////////////////////////////////////////
 ///                       END OF FILE                                ///
 ////////////////////////////////////////////////////////////////////////

src/base/abci/abc.c

@@ -390,6 +390,7 @@ static int Abc_CommandAbc9Iso                ( Abc_Frame_t * pAbc, int argc, cha
 static int Abc_CommandAbc9CexInfo            ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9Cycle              ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9Cone               ( Abc_Frame_t * pAbc, int argc, char ** argv );
+static int Abc_CommandAbc9Slice              ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9PoPart             ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9MultiProve         ( Abc_Frame_t * pAbc, int argc, char ** argv );
 static int Abc_CommandAbc9Bmc                ( Abc_Frame_t * pAbc, int argc, char ** argv );
@@ -946,6 +947,7 @@ void Abc_Init( Abc_Frame_t * pAbc )
     Cmd_CommandAdd( pAbc, "ABC9",         "&cexinfo",      Abc_CommandAbc9CexInfo,      0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&cycle",        Abc_CommandAbc9Cycle,        0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&cone",         Abc_CommandAbc9Cone,         0 );
+    Cmd_CommandAdd( pAbc, "ABC9",         "&slice",        Abc_CommandAbc9Slice,        0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&popart",       Abc_CommandAbc9PoPart,       0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&mprove",       Abc_CommandAbc9MultiProve,   0 );
     Cmd_CommandAdd( pAbc, "ABC9",         "&bmc",          Abc_CommandAbc9Bmc,          0 );
@@ -31531,6 +31533,64 @@ usage:
   SeeAlso     []
 
 ***********************************************************************/
+int Abc_CommandAbc9Slice( Abc_Frame_t * pAbc, int argc, char ** argv )
+{
+    Gia_Man_t * pTemp;
+    int c, nSuppSize = 6, fVerbose = 0;
+    Extra_UtilGetoptReset();
+    while ( ( c = Extra_UtilGetopt( argc, argv, "Svh" ) ) != EOF )
+    {
+        switch ( c )
+        {
+        case 'S':
+            if ( globalUtilOptind >= argc )
+            {
+                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
+                goto usage;
+            }
+            nSuppSize = atoi(argv[globalUtilOptind]);
+            globalUtilOptind++;
+            if ( nSuppSize < 0 )
+                goto usage;
+            break;
+        case 'v':
+            fVerbose ^= 1;
+            break;
+        case 'h':
+            goto usage;
+        default:
+            goto usage;
+        }
+    }
+    if ( pAbc->pGia == NULL )
+    {
+        Abc_Print( -1, "Abc_CommandAbc9Slice(): There is no AIG.\n" );
+        return 1;
+    }
+    pTemp = Gia_ManDupSliced( pAbc->pGia, nSuppSize );
+    Abc_FrameUpdateGia( pAbc, pTemp );
+    return 0;
+
+usage:
+    Abc_Print( -2, "usage: &slice [-S num] [-vh]\n" );
+    Abc_Print( -2, "\t         cuts the lower part of the AIG with nodes using their support\n" );
+    Abc_Print( -2, "\t-S num : the largest support size to keep in the slide [default = %d]\n", nSuppSize );
+    Abc_Print( -2, "\t-v     : toggle printing verbose information [default = %s]\n", fVerbose? "yes": "no" );
+    Abc_Print( -2, "\t-h     : print the command usage\n");
+    return 1;
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
 int Abc_CommandAbc9PoPart( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
     extern Gia_Man_t * Gia_ManFindPoPartition( Gia_Man_t * p, int SelectShift, int fOnlyCis, int fSetLargest, int fVerbose, Vec_Ptr_t ** pvPosEquivs );