Version abc90310

1 files changed, 210 insertions, 0 deletions

diff --git a/src/aig/gia/giaEnable.c b/src/aig/gia/giaEnable.c
new file mode 100644
index 00000000..d05dc5a9
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+++ b/src/aig/gia/giaEnable.c
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+/**CFile****************************************************************
+
+  FileName    [gia.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Scalable AIG package.]
+
+  Synopsis    [Structural detection of enables, sets and resets.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: gia.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "gia.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Collects the supergate.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_CollectSuper_rec( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Int_t * vSuper )
+{
+    // if the new node is complemented or a PI, another gate begins
+    if ( Gia_IsComplement(pObj) || Gia_ObjIsCi(pObj) )
+    {
+        Vec_IntPushUnique( vSuper, Gia_ObjId(p, Gia_Regular(pObj)) );
+        return;
+    }
+    assert( Gia_ObjIsAnd(pObj) );
+    // go through the branches
+    Gia_CollectSuper_rec( p, Gia_ObjChild0(pObj), vSuper );
+    Gia_CollectSuper_rec( p, Gia_ObjChild1(pObj), vSuper );
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Collects the supergate.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_CollectSuper( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Int_t * vSuper )
+{
+    assert( !Gia_IsComplement(pObj) );
+    Vec_IntClear( vSuper );
+//    Gia_CollectSuper_rec( p, pObj, vSuper );
+    if ( Gia_ObjIsAnd(pObj) )
+    {
+        Vec_IntPushUnique( vSuper, Gia_ObjId(p, Gia_ObjFanin0(pObj)) );
+        Vec_IntPushUnique( vSuper, Gia_ObjId(p, Gia_ObjFanin1(pObj)) );
+    }
+    else
+        Vec_IntPushUnique( vSuper, Gia_ObjId(p, Gia_Regular(pObj)) );
+
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_ManPrintSignals( Gia_Man_t * p, int * pFreq, char * pStr )
+{
+    Vec_Int_t * vObjs;
+    int i, Counter = 0, nTotal = 0;
+    vObjs = Vec_IntAlloc( 100 );
+    for ( i = 0; i < Gia_ManObjNum(p); i++ )
+        if ( pFreq[i] > 1 )
+        {
+            nTotal += pFreq[i];
+            Counter++;
+        }
+    printf( "%s (total = %d  driven = %d)\n", pStr, Counter, nTotal );
+    Counter = 0;
+    for ( i = 0; i < Gia_ManObjNum(p); i++ )
+        if ( pFreq[i] > 1 )
+        {
+            printf( "%3d :   Obj = %6d   Refs = %6d   Freq = %6d\n", 
+                ++Counter, i, Gia_ObjRefs(p, Gia_ManObj(p,i)), pFreq[i] );
+            Vec_IntPush( vObjs, i );
+        }
+    Vec_IntFree( vObjs );
+}
+
+/**Function*************************************************************
+
+  Synopsis    []
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Gia_ManDetectSeqSignals( Gia_Man_t * p, int fSetReset )
+{
+    Vec_Int_t * vSuper;
+    Gia_Obj_t * pFlop, * pObjC, * pObj0, * pObj1, * pNode, * pTemp;
+    int i, k, Ent, * pSets, * pResets, * pEnables;
+    int nHaveSetReset = 0, nHaveEnable = 0;
+    assert( Gia_ManRegNum(p) > 0 );
+    pSets    = ABC_CALLOC( int, Gia_ManObjNum(p) );
+    pResets  = ABC_CALLOC( int, Gia_ManObjNum(p) );
+    pEnables = ABC_CALLOC( int, Gia_ManObjNum(p) );
+    vSuper   = Vec_IntAlloc( 100 );
+    Gia_ManForEachRi( p, pFlop, i )
+    {
+        pNode = Gia_ObjFanin0(pFlop);
+        if ( !Gia_ObjIsAnd(pNode) )
+            continue;
+        // detect sets/resets
+        Gia_CollectSuper( p, pNode, vSuper );
+        if ( Gia_ObjFaninC0(pFlop) )
+            Vec_IntForEachEntry( vSuper, Ent, k )
+                pSets[Ent]++;
+        else
+            Vec_IntForEachEntry( vSuper, Ent, k )
+                pResets[Ent]++;
+        // detect enables
+        if ( !Gia_ObjIsMuxType(pNode) )
+            continue;
+        pObjC = Gia_ObjRecognizeMux( pNode, &pObj0, &pObj1 );
+        pTemp = Gia_ObjRiToRo( p, pFlop );
+        if ( Gia_Regular(pObj0) != pTemp && Gia_Regular(pObj1) != pTemp )
+            continue;
+        if ( !Gia_ObjFaninC0(pFlop) )
+        {
+            pObj0 = Gia_Not(pObj0);
+            pObj1 = Gia_Not(pObj1);
+        }
+        if ( Gia_IsComplement(pObjC) )
+        {
+            pObjC = Gia_Not(pObjC);
+            pTemp = pObj0;
+            pObj0 = pObj1;
+            pObj1 = pTemp;
+        }
+        // detect controls
+//        Gia_CollectSuper( p, pObjC, vSuper );
+//        Vec_IntForEachEntry( vSuper, Ent, k )
+//            pEnables[Ent]++;
+        pEnables[Gia_ObjId(p, pObjC)]++;
+        nHaveEnable++;
+    }
+    Gia_ManForEachRi( p, pFlop, i )
+    {
+        pNode = Gia_ObjFanin0(pFlop);
+        if ( !Gia_ObjIsAnd(pNode) )
+            continue;
+        // detect sets/resets
+        Gia_CollectSuper( p, pNode, vSuper );
+        Vec_IntForEachEntry( vSuper, Ent, k )
+            if ( pSets[Ent] > 1 || pResets[Ent] > 1 )
+            {
+                nHaveSetReset++;
+                break;
+            }
+    }
+    Vec_IntFree( vSuper );
+    Gia_ManCreateRefs( p );
+    printf( "Flops with set/reset = %6d. Flops with enable = %6d.\n", nHaveSetReset, nHaveEnable );
+    if ( fSetReset )
+    {
+        Gia_ManPrintSignals( p, pSets, "Set signals" );
+        Gia_ManPrintSignals( p, pResets, "Reset signals" );
+    }
+    Gia_ManPrintSignals( p, pEnables, "Enable signals" );
+    ABC_FREE( p->pRefs );
+    ABC_FREE( pSets );
+    ABC_FREE( pResets );
+    ABC_FREE( pEnables );
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+