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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.   Addition‐
	      ally, 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)

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