src/map/fpga/fpga.c

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#include "fpgaInt.h"
#include "main.h"


static int Fpga_CommandReadLibrary( Abc_Frame_t * pAbc, int argc, char **argv );
static int Fpga_CommandPrintLibrary( Abc_Frame_t * pAbc, int argc, char **argv );

// the library file format should be as follows:
/*
# The area/delay of k-variable LUTs:
# k  area   delay
1      1      1
2      2      2
3      4      3
4      8      4
5     16      5
6     32      6
*/


void Fpga_Init( Abc_Frame_t * pAbc )
{
    // set the default library
    //Fpga_LutLib_t s_LutLib = { "lutlib", 6, 0, {0,1,2,4,8,16,32}, {{0},{1},{2},{3},{4},{5},{6}} };
//    Fpga_LutLib_t s_LutLib = { "lutlib", 5, 0, {0,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib = { "lutlib", 4, 0, {0,1,1,1,1}, {{0},{1},{1},{1},{1}} };
    //Fpga_LutLib_t s_LutLib = { "lutlib", 3, 0, {0,1,1,1}, {{0},{1},{1},{1}} };

    Abc_FrameSetLibLut( Fpga_LutLibDup(&s_LutLib) );

    Cmd_CommandAdd( pAbc, "FPGA mapping", "read_lut",   Fpga_CommandReadLibrary,   0 ); 
    Cmd_CommandAdd( pAbc, "FPGA mapping", "print_lut",  Fpga_CommandPrintLibrary,  0 ); 
}

void Fpga_End()
{
    Fpga_LutLibFree( Abc_FrameReadLibLut() );
}


int Fpga_CommandReadLibrary( Abc_Frame_t * pAbc, int argc, char **argv )
{
    FILE * pFile;
    FILE * pOut, * pErr;
    Fpga_LutLib_t * pLib;
    Abc_Ntk_t * pNet;
    char * FileName;
    int fVerbose;
    int c;

    pNet = Abc_FrameReadNtk(pAbc);
    pOut = Abc_FrameReadOut(pAbc);
    pErr = Abc_FrameReadErr(pAbc);

    // set the defaults
    fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "vh")) != EOF ) 
    {
        switch (c) 
        {
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }


    if ( argc != globalUtilOptind + 1 )
    {
        goto usage;
    }

    // get the input file name
    FileName = argv[globalUtilOptind];
    if ( (pFile = fopen( FileName, "r" )) == NULL )
    {
        fprintf( pErr, "Cannot open input file \"%s\". ", FileName );
        if ( FileName = Extra_FileGetSimilarName( FileName, ".genlib", ".lib", ".gen", ".g", NULL ) )
            fprintf( pErr, "Did you mean \"%s\"?", FileName );
        fprintf( pErr, "\n" );
        return 1;
    }
    fclose( pFile );

    // set the new network
    pLib = Fpga_LutLibCreate( FileName, fVerbose );
    if ( pLib == NULL )
    {
        fprintf( pErr, "Reading LUT library has failed.\n" );
        goto usage;
    }
    // replace the current library
    Fpga_LutLibFree( Abc_FrameReadLibLut() );
    Abc_FrameSetLibLut( pLib );
    return 0;

usage:
    fprintf( pErr, "\nusage: read_lut [-vh]\n");
    fprintf( pErr, "\t          read the LUT library from the file\n" );  
    fprintf( pErr, "\t-v      : toggles enabling of verbose output [default = %s]\n", (fVerbose? "yes" : "no") );
    fprintf( pErr, "\t-h      : print the command usage\n");
    fprintf( pErr, "\t                                        \n");
    fprintf( pErr, "\t          File format for a LUT library:\n");
    fprintf( pErr, "\t          (the default library is shown)\n");
    fprintf( pErr, "\t                                        \n");
    fprintf( pErr, "\t          # The area/delay of k-variable LUTs:\n");
    fprintf( pErr, "\t          # k  area   delay\n");
    fprintf( pErr, "\t          1      1      1\n");
    fprintf( pErr, "\t          2      2      2\n");
    fprintf( pErr, "\t          3      4      3\n");
    fprintf( pErr, "\t          4      8      4\n");
    fprintf( pErr, "\t          5     16      5\n");
    fprintf( pErr, "\t          6     32      6\n");
    return 1;       /* error exit */
}

int Fpga_CommandPrintLibrary( Abc_Frame_t * pAbc, int argc, char **argv )
{
    FILE * pOut, * pErr;
    Abc_Ntk_t * pNet;
    int fVerbose;
    int c;

    pNet = Abc_FrameReadNtk(pAbc);
    pOut = Abc_FrameReadOut(pAbc);
    pErr = Abc_FrameReadErr(pAbc);

    // set the defaults
    fVerbose = 1;
    Extra_UtilGetoptReset();
    while ( (c = Extra_UtilGetopt(argc, argv, "vh")) != EOF ) 
    {
        switch (c) 
        {
            case 'v':
                fVerbose ^= 1;
                break;
            case 'h':
                goto usage;
                break;
            default:
                goto usage;
        }
    }


    if ( argc != globalUtilOptind )
    {
        goto usage;
    }

    // set the new network
    Fpga_LutLibPrint( Abc_FrameReadLibLut() );
    return 0;

usage:
    fprintf( pErr, "\nusage: read_print [-vh]\n");
    fprintf( pErr, "\t          print the current LUT library\n" );  
    fprintf( pErr, "\t-v      : toggles enabling of verbose output [default = %s]\n", (fVerbose? "yes" : "no") );
    fprintf( pErr, "\t-h      : print the command usage\n");
    return 1;       /* error exit */
}

void Fpga_SetSimpleLutLib( int nLutSize )
{
    Fpga_LutLib_t s_LutLib10= { "lutlib",10, 0, {0,1,1,1,1,1,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib9 = { "lutlib", 9, 0, {0,1,1,1,1,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib8 = { "lutlib", 8, 0, {0,1,1,1,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib7 = { "lutlib", 7, 0, {0,1,1,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib6 = { "lutlib", 6, 0, {0,1,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib5 = { "lutlib", 5, 0, {0,1,1,1,1,1}, {{0},{1},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib4 = { "lutlib", 4, 0, {0,1,1,1,1}, {{0},{1},{1},{1},{1}} };
    Fpga_LutLib_t s_LutLib3 = { "lutlib", 3, 0, {0,1,1,1}, {{0},{1},{1},{1}} };
    Fpga_LutLib_t * pLutLib;
    assert( nLutSize >= 3 && nLutSize <= 10 );
    switch ( nLutSize )
    {
        case 3:  pLutLib = &s_LutLib3; break;
        case 4:  pLutLib = &s_LutLib4; break;
        case 5:  pLutLib = &s_LutLib5; break;
        case 6:  pLutLib = &s_LutLib6; break;
        case 7:  pLutLib = &s_LutLib7; break;
        case 8:  pLutLib = &s_LutLib8; break;
        case 9:  pLutLib = &s_LutLib9; break;
        case 10: pLutLib = &s_LutLib10; break;
        default: pLutLib = NULL; break;
    }
    if ( pLutLib == NULL )
        return;
    Fpga_LutLibFree( Abc_FrameReadLibLut() );
    Abc_FrameSetLibLut( Fpga_LutLibDup(pLutLib) );
}

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