docs/wiki/geda-gtkwave_vcd2lxt_mp.html

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  15 <h1 class="sectionedit277"><a name="converts_vcd_files_to_interlaced_or_linear_lxt_files_vcd2lxt" id="converts_vcd_files_to_interlaced_or_linear_lxt_files_vcd2lxt">Converts VCD files to interlaced or linear LXT files (vcd2lxt)</a></h1>
  16 <div class="level1">
  17 <pre class="code">VCD2LXT(1)                  Filetype Conversion                   VCD2LXT(1)
  18
  19
  20
  21 NAME
  22        vcd2lxt - Converts VCD files to interlaced or linear LXT files
  23
  24 SYNTAX
  25        vcd2lxt [VCDFILE] [LXTFILE] [option]...
  26
  27 DESCRIPTION
  28        Converts  VCD  files  to interlaced or linear LXT files.  Noncompressed
  29        interlaced files will provide the fastest  access,  linear  files  will
  30        provide the slowest yet have the greatest compression ratios.
  31
  32 OPTIONS
  33        -stats Prints  out  statistics  on  all nets in VCD file in addition to
  34               performing the conversion.
  35
  36        -clockpack
  37               Apply two-way subtraction algorithm in order  to  identify  nets
  38               whose   value   changes   by  a  constant  XOR  or  whose  value
  39               increases/decreases by a constant amount per  constant  unit  of
  40               time.   This  option  can  reduce  dumpfile size dramatically as
  41               value changes can be represented  by  an  equation  rather  than
  42               explicitly as a triple of time, net, and value.
  43
  44        -chgpack
  45               Emit data to file after being filtered through zlib (gzip).
  46
  47        -linear
  48               Write  out  LXT  in &quot;linear&quot; format with no backpointers.        These
  49               are re-generated during initialization  in  gtkwave.   Addition-
  50               ally, use libbz2 (bzip2) as the compression filter.
  51
  52        -dictpack &lt;size&gt;
  53               Store  value  changes  greater  than or equal to size bits as an
  54               index into a dictionary.  Experimentation shows that a value  of
  55               18 is optimal for most cases.
  56
  57 EXAMPLES
  58        Note  that  you  should  specify  dumpfile.vcd  directly or use &quot;-&quot; for
  59        stdin.
  60
  61        vcd2lxt dumpfile.vcd dumpfile.lxt -clockpack -chgpack -dictpack 18
  62               This turns on clock packing, zlib compression, and  enables  the
  63               dictionary  encoding.   Note  that using no options writes out a
  64               normal LXT file.
  65
  66        vcd2lxt dumpfile.vcd dumpfile.lxt -clockpack -linear -dictpack 18
  67               Uses linear mode for even smaller files.
  68
  69 AUTHORS
  70        Anthony Bybell &lt;bybell@nc.rr.com&gt;
  71
  72 SEE ALSO
  73        lxt2vcd(1) vcd2lxt2(1) gtkwave(1)
  74
  75
  76
  77 Anthony Bybell                      1.3.34                          VCD2LXT(1)</pre>
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