From b9abf9c00c02feb52a2c796199343acebe20d8ef Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Sat, 9 Dec 2006 08:01:00 -0800
Subject: Version abc61209

---
 src/map/fpga/fpgaLib.c | 69 ++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 59 insertions(+), 10 deletions(-)

(limited to 'src/map/fpga/fpgaLib.c')

diff --git a/src/map/fpga/fpgaLib.c b/src/map/fpga/fpgaLib.c
index 00832bce..8ac66cdc 100644
--- a/src/map/fpga/fpgaLib.c
+++ b/src/map/fpga/fpgaLib.c
@@ -39,9 +39,7 @@
 ***********************************************************************/
 int         Fpga_LutLibReadVarMax( Fpga_LutLib_t * p )               { return p->LutMax;     }
 float *     Fpga_LutLibReadLutAreas( Fpga_LutLib_t * p )             { return p->pLutAreas;  }
-float *     Fpga_LutLibReadLutDelays( Fpga_LutLib_t * p )            { return p->pLutDelays; }
 float       Fpga_LutLibReadLutArea( Fpga_LutLib_t * p, int Size )    { assert( Size <= p->LutMax ); return p->pLutAreas[Size];  }
-float       Fpga_LutLibReadLutDelay( Fpga_LutLib_t * p, int Size )   { assert( Size <= p->LutMax ); return p->pLutDelays[Size]; }
 
 /**Function*************************************************************
 
@@ -59,7 +57,7 @@ Fpga_LutLib_t * Fpga_LutLibCreate( char * FileName, int fVerbose )
     char pBuffer[1000], * pToken;
     Fpga_LutLib_t * p;
     FILE * pFile;
-    int i;
+    int i, k;
 
     pFile = fopen( FileName, "r" );
     if ( pFile == NULL )
@@ -87,16 +85,30 @@ Fpga_LutLib_t * Fpga_LutLibCreate( char * FileName, int fVerbose )
             return NULL;
         }
 
+        // read area
         pToken = strtok( NULL, " \t\n" );
         p->pLutAreas[i] = (float)atof(pToken);
 
-        pToken = strtok( NULL, " \t\n" );
-        p->pLutDelays[i] = (float)atof(pToken);
+        // read delays
+        k = 0;
+        while ( pToken = strtok( NULL, " \t\n" ) )
+            p->pLutDelays[i][k++] = (float)atof(pToken);
+
+        // check for out-of-bound
+        if ( k > i )
+        {
+            printf( "LUT %d has too many pins (%d). Max allowed is %d.\n", i, k, i );
+            return NULL;
+        }
+
+        // check if var delays are specifies
+        if ( k > 1 )
+            p->fVarPinDelays = 1;
 
         if ( i == FPGA_MAX_LUTSIZE )
         {
             printf( "Skipping LUTs of size more than %d.\n", i );
-            break;
+            return NULL;
         }
         i++;
     }
@@ -106,6 +118,32 @@ Fpga_LutLib_t * Fpga_LutLibCreate( char * FileName, int fVerbose )
         p->LutMax = FPGA_MAX_LEAVES;
         printf( "Warning: LUTs with more than %d input will not be used.\n", FPGA_MAX_LEAVES );
     }
+
+    // check the library
+    if ( p->fVarPinDelays )
+    {
+        for ( i = 1; i <= p->LutMax; i++ )
+            for ( k = 0; k < i; k++ )
+            {
+                if ( p->pLutDelays[i][k] <= 0.0 )
+                    printf( "Warning: Pin %d of LUT %d has delay %f. Pin delays should be non-negative numbers. Technology mapping may not work correctly.\n", 
+                        k, i, p->pLutDelays[i][k] );
+                if ( k && p->pLutDelays[i][k-1] > p->pLutDelays[i][k] )
+                    printf( "Warning: Pin %d of LUT %d has delay %f. Pin %d of LUT %d has delay %f. Pin delays should be in non-degreasing order. Technology mapping may not work correctly.\n", 
+                        k-1, i, p->pLutDelays[i][k-1], 
+                        k, i, p->pLutDelays[i][k] );
+            }
+    }
+    else
+    {
+        for ( i = 1; i <= p->LutMax; i++ )
+        {
+            if ( p->pLutDelays[i][0] <= 0.0 )
+                printf( "Warning: LUT %d has delay %f. Pin delays should be non-negative numbers. Technology mapping may not work correctly.\n", 
+                    k, i, p->pLutDelays[i][0] );
+        }
+    }
+
     return p;
 }
 
@@ -162,11 +200,22 @@ void Fpga_LutLibFree( Fpga_LutLib_t * pLutLib )
 ***********************************************************************/
 void Fpga_LutLibPrint( Fpga_LutLib_t * pLutLib )
 {
-    int i;
+    int i, k;
     printf( "# The area/delay of k-variable LUTs:\n" );
     printf( "# k    area     delay\n" );
-    for ( i = 1; i <= pLutLib->LutMax; i++ )
-        printf( "%d   %7.2f   %7.2f\n", i, pLutLib->pLutAreas[i], pLutLib->pLutDelays[i] );
+    if ( pLutLib->fVarPinDelays )
+    {
+        for ( i = 1; i <= pLutLib->LutMax; i++ )
+        {
+            printf( "%d   %7.2f  ", i, pLutLib->pLutAreas[i] );
+            for ( k = 0; k < i; k++ )
+                printf( " %7.2f", pLutLib->pLutDelays[i][k] );
+            printf( "\n" );
+        }
+    }
+    else
+        for ( i = 1; i <= pLutLib->LutMax; i++ )
+            printf( "%d   %7.2f   %7.2f\n", i, pLutLib->pLutAreas[i], pLutLib->pLutDelays[i][0] );
 }
 
 /**Function*************************************************************
@@ -186,7 +235,7 @@ int Fpga_LutLibDelaysAreDiscrete( Fpga_LutLib_t * pLutLib )
     int i;
     for ( i = 1; i <= pLutLib->LutMax; i++ )
     {
-        Delay = pLutLib->pLutDelays[i];
+        Delay = pLutLib->pLutDelays[i][0];
         if ( ((float)((int)Delay)) != Delay )
             return 0;
     }
-- 
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