NAME
vcd2vzt - Converts VCD files to VZT files
SYNTAX
vcd2vzt [option]... [VCDFILE] [VZTFILE]
DESCRIPTION
Converts VCD files to VZT files.
OPTIONS
-v,--vcdname <filename>
Specify VCD input filename.
-l,--vztname <filename>
Specify VZT output filename.
-d,--depth <value>
Specify 0..9 gzip compression depth, default is 4.
-m,--maxgranule <value>
Specify number of granules per section, default is 8. One
granule is equal to 32 timesteps.
-b,--break <value>
Specify break size (default = 0 = off). When the break size is
exceeded, the VZT dumper will dump all state information at the
next convenient granule plus dictionary boundary.
-z,--ziptype <value>
Specify zip type (default = 0 gzip, 1 = bzip2, 2 = lzma). This
allows you to override the default compression algorithm to use
a more effective one at the expense of greater runtime. Note
that bzip2 does not decompress as fast as gzip so the viewer
will be about two times slower when decompressing blocks.
-t,--twostate
Forces MVL2 twostate mode (default is MVL4). When enabled, the
trace will only store 0/1 values for binary facilities. This is
useful for functional simulation and will speed up dumping as
well as make traces somewhat smaller.
-r, --rle
Uses an bitwise RLE compression on the value table. Default is
off. When enabled, this causes the trace data table to be
stored using an alternate representation which can improve
compression in many cases.
-h,--help
Show help screen.
EXAMPLES
Note that you should specify dumpfile.vcd directly or use "-" for
stdin.
vcd2vzt dumpfile.vcd dumpfile.lxt --depth 9 --break 1073741824
This sets the compression level to 9 and sets the break size to
1GB.
vcd2vzt dumpfile.vcd dumpfile.lxt --depth 9 --maxgranule 512
Allows more granules per section which allows for greater
compression at the expense of memory usage.
LIMITATIONS
vcd2vzt does not store glitches as these are coalesced together into
one value change during the writing of the VZT file.
AUTHORS
Anthony Bybell <bybell@nc.rr.com>
SEE ALSO
vzt2vcd(1) lxt2vcd(1) vcd2lxt2(1) gtkwave(1)