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vcd2lxt

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vcd2lxt: Converts VCD files to interlaced or linear LXT files

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@nc.rr.com>

SEE ALSO

lxt2vcd(1) vcd2lxt2(1) gtkwave(1) VCD2LXT(1)
 
 
 

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