vcd2lxt

VCD2LXT(1)                    Filetype Conversion                   VCD2LXT(1)



NAME
       vcd2lxt - Converts VCD files to interlaced or linear LXT files

SYNTAX
       vcd2lxt [VCDFILE] [LXTFILE] [option]...

DESCRIPTION
       Converts VCD files to interlaced or linear LXT files.  Noncompressed
       interlaced files will provide the fastest access, linear files will
       provide the slowest yet have the greatest compression ratios.

OPTIONS
       -stats Prints out statistics on all nets in VCD file in addition to
              performing the conversion.

       -clockpack
              Apply two-way subtraction algorithm in order to identify nets
              whose value changes by a constant XOR or whose value
              increases/decreases by a constant amount per constant unit of
              time.  This option can reduce dumpfile size dramatically as
              value changes can be represented by an equation rather than
              explicitly as a triple of time, net, and value.

       -chgpack
              Emit data to file after being filtered through zlib (gzip).

       -linear
              Write out LXT in "linear" format with no backpointers.  These
              are re-generated during initialization in gtkwave.
              Additionally, use libbz2 (bzip2) as the compression filter.

       -dictpack <size>
              Store value changes greater than or equal to size bits as an
              index into a dictionary.  Experimentation shows that a value of
              18 is optimal for most cases.

EXAMPLES
       Note that you should specify dumpfile.vcd directly or use "-" for
       stdin.

       vcd2lxt dumpfile.vcd dumpfile.lxt -clockpack -chgpack -dictpack 18
              This turns on clock packing, zlib compression, and enables the
              dictionary encoding.  Note that using no options writes out a
              normal LXT file.

       vcd2lxt dumpfile.vcd dumpfile.lxt -clockpack -linear -dictpack 18
              Uses linear mode for even smaller files.

AUTHORS
       Anthony Bybell <bybell@rocketmail.com>

SEE ALSO
       lxt2vcd(1) vcd2lxt2(1) gtkwave(1)



Anthony Bybell                      1.3.34                          VCD2LXT(1)