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@rocketmail.com>
SEE ALSO¶
vzt2vcd(1) lxt2vcd(1) vcd2lxt2(1) gtkwave(1)