LUT cascade mapping.

Author: alanminko

src/base/abci/abc.c

@@ -8853,7 +8853,7 @@ int Abc_CommandCascade( Abc_Frame_t * pAbc, int argc, char ** argv )
 
     if ( pNtk == NULL )
     {
-        Abc_Print( -1, "Empty network.\n" );
+        Abc_Print( -1, "Empty neAtwork.\n" );
         return 1;
     }
 
@@ -8910,12 +8910,12 @@ int Abc_CommandCascade( Abc_Frame_t * pAbc, int argc, char ** argv )
 ***********************************************************************/
 int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
 {
-    extern Abc_Ntk_t * Abc_NtkLutCascade( Abc_Ntk_t * pNtk, int nLutSize, int nLuts, int nRails, int nIters, int fVerbose );
-    extern Abc_Ntk_t * Abc_NtkLutCascade2( Abc_Ntk_t * pNtk, int nLutSize, int nLuts, int nRails, int nIters, int fVerbose );
-    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkRes;
-    int c, nLutSize = 6, nLuts = 8, nRails = 1, nIters = 1, fVerbose = 0;
+    extern Abc_Ntk_t * Abc_NtkLutCascadeGen( int nLutSize, int nStages, int nRails, int nShared, int fVerbose );
+    extern Abc_Ntk_t * Abc_NtkLutCascade2( Abc_Ntk_t * pNtk, int nLutSize, int nLuts, int nRails, int nIters, int fVerbose, char * pGuide );
+    Abc_Ntk_t * pNtk = Abc_FrameReadNtk(pAbc), * pNtkRes; char * pGuide = NULL;
+    int c, nLutSize = 6, nStages = 8, nRails = 1, nShared = 2, nIters = 1, fGen = 0, fVerbose = 0;
     Extra_UtilGetoptReset();
-    while ( ( c = Extra_UtilGetopt( argc, argv, "KNRIvh" ) ) != EOF )
+    while ( ( c = Extra_UtilGetopt( argc, argv, "KMRSIgvh" ) ) != EOF )
     {
         switch ( c )
         {
@@ -8930,15 +8930,15 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
             if ( nLutSize < 0 )
                 goto usage;
             break;
-        case 'N':
+        case 'M':
             if ( globalUtilOptind >= argc )
             {
-                Abc_Print( -1, "Command line switch \"-N\" should be followed by an integer.\n" );
+                Abc_Print( -1, "Command line switch \"-M\" should be followed by an integer.\n" );
                 goto usage;
             }
-            nLuts = atoi(argv[globalUtilOptind]);
+            nStages = atoi(argv[globalUtilOptind]);
             globalUtilOptind++;
-            if ( nLuts < 0 )
+            if ( nStages < 0 )
                 goto usage;
             break;
         case 'R':
@@ -8952,6 +8952,17 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
             if ( nRails < 0 )
                 goto usage;
             break;
+        case 'S':
+            if ( globalUtilOptind >= argc )
+            {
+                Abc_Print( -1, "Command line switch \"-S\" should be followed by an integer.\n" );
+                goto usage;
+            }
+            nShared = atoi(argv[globalUtilOptind]);
+            globalUtilOptind++;
+            if ( nShared < 0 )
+                goto usage;
+            break;
         case 'I':
             if ( globalUtilOptind >= argc )
             {
@@ -8963,6 +8974,9 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
             if ( nIters < 0 )
                 goto usage;
             break;
+        case 'g':
+            fGen ^= 1;
+            break;
         case 'v':
             fVerbose ^= 1;
             break;
@@ -8972,6 +8986,17 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
             goto usage;
         }
     }
+    if ( fGen )
+    {
+        pNtkRes = Abc_NtkLutCascadeGen( nLutSize, nStages, nRails, nShared, fVerbose );
+        if ( pNtkRes == NULL )
+        {
+            Abc_Print( -1, "LUT cascade generation failed.\n" );
+            return 1;
+        }
+        Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
+        return 0;
+    }
 
     if ( pNtk == NULL )
     {
@@ -8988,13 +9013,15 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
         Abc_Print( -1, "Run command \"strash\" to convert the network into an AIG.\n" );
         return 1;
     }
-    if ( Abc_NtkCiNum(pNtk) > nLutSize + (nLutSize - nRails) * (nLuts - 1) )
+    if ( Abc_NtkCiNum(pNtk) > nLutSize + (nLutSize - nRails) * (nStages - 1) )
     {
         Abc_Print( -1, "Cannot decompose %d-input function into a %d-rail cascade of %d %d-LUTs (max suppose size = %d).\n", 
-            Abc_NtkCiNum(pNtk), nRails, nLuts, nLutSize, nLutSize + (nLutSize - nRails) * (nLuts - 1) );
+            Abc_NtkCiNum(pNtk), nRails, nStages, nLutSize, nLutSize + (nLutSize - nRails) * (nStages - 1) );
         return 1;
     }
-    pNtkRes = Abc_NtkLutCascade2( pNtk, nLutSize, nLuts, nRails, nIters, fVerbose );
+    if ( argc == globalUtilOptind + 1 )
+        pGuide = argv[globalUtilOptind];
+    pNtkRes = Abc_NtkLutCascade2( pNtk, nLutSize, nStages, nRails, nIters, fVerbose, pGuide );
     if ( pNtkRes == NULL )
     {
         Abc_Print( -1, "LUT cascade mapping failed.\n" );
@@ -9004,12 +9031,14 @@ int Abc_CommandLutCasDec( Abc_Frame_t * pAbc, int argc, char ** argv )
     return 0;
 
 usage:
-    Abc_Print( -2, "usage: lutcasdec [-KNRI <num>] [-vh]\n" );
+    Abc_Print( -2, "usage: lutcasdec [-KMRSI <num>] [-vh]\n" );
     Abc_Print( -2, "\t           decomposes the primary output functions into LUT cascades\n" );
     Abc_Print( -2, "\t-K <num> : the number of LUT inputs [default = %d]\n", nLutSize );
-    Abc_Print( -2, "\t-N <num> : the number of LUTs in the cascade [default = %d]\n", nLuts );
+    Abc_Print( -2, "\t-M <num> : the maximum delay (the number of stages) [default = %d]\n", nStages );
     Abc_Print( -2, "\t-R <num> : the number of direct connections (rails) [default = %d]\n", nRails );
+    Abc_Print( -2, "\t-S <num> : the number of shared variables in each stage [default = %d]\n", nShared );
     Abc_Print( -2, "\t-I <num> : the number of iterations when looking for a solution [default = %d]\n", nIters );
+    Abc_Print( -2, "\t-g       : toggle generating random cascade with these parameters [default = %s]\n", fGen? "yes": "no" );
     Abc_Print( -2, "\t-v       : toggle verbose printout [default = %s]\n", fVerbose? "yes": "no" );
     Abc_Print( -2, "\t-h       : print the command usage\n");
     return 1;