src/map/fpga/fpgaLib.c File Reference

#include "fpgaInt.h"

Include dependency graph for fpgaLib.c:

Go to the source code of this file.

Functions
int	Fpga_LutLibReadVarMax (Fpga_LutLib_t *p)
float *	Fpga_LutLibReadLutAreas (Fpga_LutLib_t *p)
float	Fpga_LutLibReadLutArea (Fpga_LutLib_t *p, int Size)
Fpga_LutLib_t *	Fpga_LutLibCreate (char *FileName, int fVerbose)
Fpga_LutLib_t *	Fpga_LutLibDup (Fpga_LutLib_t *p)
void	Fpga_LutLibFree (Fpga_LutLib_t *pLutLib)
void	Fpga_LutLibPrint (Fpga_LutLib_t *pLutLib)
int	Fpga_LutLibDelaysAreDiscrete (Fpga_LutLib_t *pLutLib)

---

Function Documentation

Fpga_LutLib_t* Fpga_LutLibCreate	(	char *	FileName,
		int	fVerbose
	)

Function*************************************************************

Synopsis [Reads the description of LUTs from the LUT library file.]

Description []

SideEffects []

SeeAlso []

Definition at line 55 of file fpgaLib.c.

{
    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;
}

int Fpga_LutLibDelaysAreDiscrete

(

Fpga_LutLib_t *

pLutLib

)

Function*************************************************************

Synopsis [Returns 1 if the delays are discrete.]

Description []

SideEffects []

SeeAlso []

Definition at line 232 of file fpgaLib.c.

{
    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;
}

Fpga_LutLib_t* Fpga_LutLibDup

(

Fpga_LutLib_t *

p

)

Function*************************************************************

Synopsis [Duplicates the LUT library.]

Description []

SideEffects []

SeeAlso []

Definition at line 161 of file fpgaLib.c.

{
    Fpga_LutLib_t * pNew;
    pNew = ALLOC( Fpga_LutLib_t, 1 );
    *pNew = *p;
    pNew->pName = Extra_UtilStrsav( pNew->pName );
    return pNew;
}

void Fpga_LutLibFree

(

Fpga_LutLib_t *

pLutLib

)

Function*************************************************************

Synopsis [Frees the LUT library.]

Description []

SideEffects []

SeeAlso []

Definition at line 181 of file fpgaLib.c.

{
    if ( pLutLib == NULL )
        return;
    FREE( pLutLib->pName );
    FREE( pLutLib );
}

void Fpga_LutLibPrint

(

Fpga_LutLib_t *

pLutLib

)

Function*************************************************************

Synopsis [Prints the LUT library.]

Description []

SideEffects []

SeeAlso []

Definition at line 201 of file fpgaLib.c.

{
    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] );
}

float Fpga_LutLibReadLutArea	(	Fpga_LutLib_t *	p,
		int	Size
	)

Definition at line 42 of file fpgaLib.c.

{ assert( Size <= p->LutMax ); return p->pLutAreas[Size];  }

float* Fpga_LutLibReadLutAreas

(

Fpga_LutLib_t *

p

)

Definition at line 41 of file fpgaLib.c.

{ return p->pLutAreas;  }

int Fpga_LutLibReadVarMax

(

Fpga_LutLib_t *

p

)

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

] DECLARATIONS /// FUNCTION DEFINITIONS ///Function*************************************************************

Synopsis [APIs to access LUT library.]

Description []

SideEffects []

SeeAlso []

Definition at line 40 of file fpgaLib.c.

{ return p->LutMax;     }