1 files changed, 74 insertions, 0 deletions
diff --git a/src/aig/saig/saigScl.c b/src/aig/saig/saigScl.c
new file mode 100644
index 00000000..b747eff9
--- /dev/null
+++ b/src/aig/saig/saigScl.c
@@ -0,0 +1,74 @@
+/**CFile****************************************************************
+
+  FileName    [saigScl.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Sequential AIG package.]
+
+  Synopsis    [Sequential cleanup.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: saigScl.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "saig.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Report registers useless for SEC.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+void Saig_ManReportUselessRegisters( Aig_Man_t * pAig )
+{
+    Aig_Obj_t * pObj, * pDriver;
+    int i, Counter1, Counter2;
+    // set PIO numbers
+    Aig_ManSetPioNumbers( pAig );
+    // check how many POs are driven by a register whose ref count is 1
+    Counter1 = 0;
+    Saig_ManForEachPo( pAig, pObj, i )
+    {
+        pDriver = Aig_ObjFanin0(pObj);
+        if ( Saig_ObjIsLo(pAig, pDriver) && Aig_ObjRefs(pDriver) == 1 )
+            Counter1++;
+    }
+    // check how many PIs have ref count 1 and drive a register
+    Counter2 = 0;
+    Saig_ManForEachLi( pAig, pObj, i )
+    {
+        pDriver = Aig_ObjFanin0(pObj);
+        if ( Saig_ObjIsPi(pAig, pDriver) && Aig_ObjRefs(pDriver) == 1 )
+            Counter2++;
+    }
+    if ( Counter1 )
+        printf( "Network has %d (out of %d) registers driving POs.\n", Counter1, Saig_ManRegNum(pAig) );
+    if ( Counter2 )
+        printf( "Network has %d (out of %d) registers driven by PIs.\n", Counter2, Saig_ManRegNum(pAig) );
+}
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+