From 5daa0c347e436e49837c1196cecf3478d4684f78 Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Fri, 16 May 2025 17:23:32 -0700
Subject: [PATCH] Small changes to "lutcasdec".

---
 src/base/abci/abc.c    |  2 +-
 src/base/abci/abcCas.c | 13 ++++++++-----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/base/abci/abc.c b/src/base/abci/abc.c
index 83f1e06ba..d0bf054ab 100644
--- a/src/base/abci/abc.c
+++ b/src/base/abci/abc.c
@@ -9299,7 +9299,7 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
             return 1;
         }
         Abc_NtkLutCascadeFile( pFileName, nVarNum, nLutSize, nStages, nRails, nIters, nJRatio, Seed, fVerbose, fVeryVerbose, fPrintMyu );
-        return 1;
+        return 0;
     }
     if ( fGen )
     {
diff --git a/src/base/abci/abcCas.c b/src/base/abci/abcCas.c
index f4136f4ce..9eb682c62 100644
--- a/src/base/abci/abcCas.c
+++ b/src/base/abci/abcCas.c
@@ -726,7 +726,8 @@ word * Abc_LutCascadeDec( char * pGuide, word * pTruth, int nVarsOrig, Vec_Int_t
     for ( i = 0; Vec_IntSize(vVarIDs) > nLutSize; i++ ) {
         nRVars = Abc_LutCascadeDecStage( pGuide, i, vFuncs, vVarIDs, nRVars, nRails, nLutSize, nJRatio, fVerbose, vCas, i ? NULL : pMyu );
         if ( i+2 > nStages ) {
-            printf( "The length of the cascade (%d) exceeds the max allowed number of stages (%d).\n", i+2, nStages );
+            if ( fVerbose )
+                printf( "The length of the cascade (%d) exceeds the max allowed number of stages (%d).\n", i+2, nStages );
             nRVars = -1;
         }
         if ( nRVars == -1 )
@@ -1466,10 +1467,12 @@ void Abc_NtkLutCascadeFile( char * pFileName, int nVarsOrig, int nLutSize, int n
             if ( MyuStats[i] )
                 printf( "   %2d Myu   : Function count = %8d (%6.2f %%)\n", i, MyuStats[i], 100.0*MyuStats[i]/nFuncs/IterReal );
     }
-    printf( "Level count statistics for %d-rail LUT cascade:\n", nRails );
-    for ( i = 0; i < 50; i++ )
-        if ( StageStats[i] )
-            printf( "   %2d level : Function count = %8d (%6.2f %%)\n", i, StageStats[i], 100.0*StageStats[i]/nFuncs );
+    if ( nRails > 1 ) {
+        printf( "Level count statistics for %d-rail LUT cascade:\n", nRails );
+        for ( i = 0; i < 50; i++ )
+            if ( StageStats[i] )
+                printf( "   %2d level : Function count = %8d (%6.2f %%)\n", i, StageStats[i], 100.0*StageStats[i]/nFuncs );
+    }
     printf( "LUT count statistics for %d-rail LUT cascade:\n", nRails );
     for ( i = 0; i < 50; i++ )
         if ( LutStats[i] )