diff options
Diffstat (limited to 'src/map/fpga/fpgaLib.c')
| -rw-r--r-- | src/map/fpga/fpgaLib.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/src/map/fpga/fpgaLib.c b/src/map/fpga/fpgaLib.c new file mode 100644 index 00000000..e74def32 --- /dev/null +++ b/src/map/fpga/fpgaLib.c @@ -0,0 +1,249 @@ +/**CFile**************************************************************** + + FileName [fpgaLib.c] + + PackageName [MVSIS 1.3: Multi-valued logic synthesis system.] + + Synopsis [Technology mapping for variable-size-LUT FPGAs.] + + Author [MVSIS Group] + + Affiliation [UC Berkeley] + + Date [Ver. 2.0. Started - August 18, 2004.] + + Revision [$Id: fpgaLib.c,v 1.4 2005/01/23 06:59:41 alanmi Exp $] + +***********************************************************************/ + +#include "fpgaInt.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [APIs to access LUT library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fpga_LutLibReadVarMax( Fpga_LutLib_t * p ) { return p->LutMax; } +float * Fpga_LutLibReadLutAreas( Fpga_LutLib_t * p ) { return p->pLutAreas; } +float Fpga_LutLibReadLutArea( Fpga_LutLib_t * p, int Size ) { assert( Size <= p->LutMax ); return p->pLutAreas[Size]; } + +/**Function************************************************************* + + Synopsis [Reads the description of LUTs from the LUT library file.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fpga_LutLib_t * Fpga_LutLibCreate( char * FileName, int fVerbose ) +{ + char pBuffer[1000], * pToken; + Fpga_LutLib_t * p; + FILE * pFile; + int i, k; + + pFile = fopen( FileName, "r" ); + if ( pFile == NULL ) + { + printf( "Cannot open LUT library file \"%s\".\n", FileName ); + return NULL; + } + + p = ALLOC( Fpga_LutLib_t, 1 ); + memset( p, 0, sizeof(Fpga_LutLib_t) ); + p->pName = Extra_UtilStrsav( FileName ); + + i = 1; + while ( fgets( pBuffer, 1000, pFile ) != NULL ) + { + pToken = strtok( pBuffer, " \t\n" ); + if ( pToken == NULL ) + continue; + if ( pToken[0] == '#' ) + continue; + if ( i != atoi(pToken) ) + { + printf( "Error in the LUT library file \"%s\".\n", FileName ); + free( p ); + return NULL; + } + + // read area + pToken = strtok( NULL, " \t\n" ); + p->pLutAreas[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 ); + return NULL; + } + i++; + } + p->LutMax = i-1; + if ( p->LutMax > FPGA_MAX_LEAVES ) + { + 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-decreasing 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; +} + +/**Function************************************************************* + + Synopsis [Duplicates the LUT library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Fpga_LutLib_t * Fpga_LutLibDup( Fpga_LutLib_t * p ) +{ + Fpga_LutLib_t * pNew; + pNew = ALLOC( Fpga_LutLib_t, 1 ); + *pNew = *p; + pNew->pName = Extra_UtilStrsav( pNew->pName ); + return pNew; +} + +/**Function************************************************************* + + Synopsis [Frees the LUT library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fpga_LutLibFree( Fpga_LutLib_t * pLutLib ) +{ + if ( pLutLib == NULL ) + return; + FREE( pLutLib->pName ); + FREE( pLutLib ); +} + + +/**Function************************************************************* + + Synopsis [Prints the LUT library.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Fpga_LutLibPrint( Fpga_LutLib_t * pLutLib ) +{ + int i, k; + printf( "# The area/delay of k-variable LUTs:\n" ); + printf( "# k area delay\n" ); + 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************************************************************* + + Synopsis [Returns 1 if the delays are discrete.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Fpga_LutLibDelaysAreDiscrete( Fpga_LutLib_t * pLutLib ) +{ + float Delay; + int i; + for ( i = 1; i <= pLutLib->LutMax; i++ ) + { + Delay = pLutLib->pLutDelays[i][0]; + if ( ((float)((int)Delay)) != Delay ) + return 0; + } + return 1; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |