ModelSim SE User's Manual - Electrical and Computer Engineering

UM-270 9 - Waveform analysis
Waveform Compare
ModelSim SE User’s Manual
The ModelSim Waveform Compare feature allows you to compare simulation runs.
Differences encountered in the comparison are summarized and listed in the Main window
transcript. Differences are also shown in the Wave and List windows, and you can write a
list of the differences to a file using the compare info command (CR-106).
Note: The Waveform Compare feature is available as an add-on to the LE version.
Contact Model Technology sales for more information.
The basic steps for running a comparison are as follows:
1 Run one simulation and save the dataset. For more information on saving datasets, see
"Saving a simulation to a WLF file" (UM-227).
2 Run a second simulation.
3 Setup and run a comparison.
4 Analyze the differences in the Wave or List window.
Mixed-language waveform compare support
Mixed-language compares are supported as listed in the following table:
C/C++ types bool, char, unsigned char
short, unsigned short
int, unsigned int
long, unsigned long
SystemC types sc_bit, sc_bv, sc_logic, sc_lv
sc_int, sc_uint
sc_bigint, sc_biguint
sc_signed, sc_unsigned
Verilog types net, reg
VHDL types bit, bit_vector, boolean, std_logic, std_logic_vector
The number of elements must match for vectors; specific indexes are ignored.
Three options for setting up a comparison
There are three options for setting up a comparison:
Comparison Wizard – A series of dialogs that "walk" you through the process
GUI – Use various dialogs to "m anually" configure the comparison
Comparison commands – Use a series of compare commands