1VCD2LXT(1) Filetype Conversion VCD2LXT(1)
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6 vcd2lxt - Converts VCD files to interlaced or linear LXT files
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9 vcd2lxt [VCDFILE] [LXTFILE] [option]...
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12 Converts VCD files to interlaced or linear LXT files. Noncompressed
13 interlaced files will provide the fastest access, linear files will
14 provide the slowest yet have the greatest compression ratios.
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17 -stats Prints out statistics on all nets in VCD file in addition to
18 performing the conversion.
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20 -clockpack
21 Apply two-way subtraction algorithm in order to identify nets
22 whose value changes by a constant XOR or whose value
23 increases/decreases by a constant amount per constant unit of
24 time. This option can reduce dumpfile size dramatically as
25 value changes can be represented by an equation rather than
26 explicitly as a triple of time, net, and value.
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28 -chgpack
29 Emit data to file after being filtered through zlib (gzip).
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31 -linear
32 Write out LXT in "linear" format with no backpointers. These
33 are re-generated during initialization in gtkwave. Additionâ
34 ally, use libbz2 (bzip2) as the compression filter.
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36 -dictpack <size>
37 Store value changes greater than or equal to size bits as an
38 index into a dictionary. Experimentation shows that a value of
39 18 is optimal for most cases.
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42 Note that you should specify dumpfile.vcd directly or use "-" for
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45 vcd2lxt dumpfile.vcd dumpfile.lxt -clockpack -chgpack -dictpack 18
46 This turns on clock packing, zlib compression, and enables the
47 dictionary encoding. Note that using no options writes out a
48 normal LXT file.
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50 vcd2lxt dumpfile.vcd dumpfile.lxt -clockpack -linear -dictpack 18
51 Uses linear mode for even smaller files.
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54 Anthony Bybell <bybell@rocketmail.com>
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57 lxt2vcd(1) vcd2lxt2(1) gtkwave(1)
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61Anthony Bybell 1.3.34 VCD2LXT(1)