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This is the command vcd2lxt that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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 <[email protected]>

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