ncverilog, ncsim, IUS, LDV

[asic1234@gmail.com]

Hi

I am used to Modelsim simulator (vlog followed by vsim).
In the same vein, how do ncverilog, ncsim, IUS5.7, LDV5.1 etc fit in?
Are they all executables to call the simulator (similar to vsim)?
Can somone please clarify

Thanks

 

[Jonathan Bromley]

On Mon, 26 Nov 2007 11:33:22 -0800 (PST),
<asic1234@gmail.com> wrote:

I am used to Modelsim simulator (vlog followed by vsim).
In the same vein, how do ncverilog, ncsim, IUS5.7, LDV5.1 etc fit in?

These are all Cadence trade names for various parts of their
simulator product line.

Are they all executables to call the simulator (similar to vsim)?

Not exactly.

IUS is "Incisive Unified Simulator", the core simulator
product. LDV is.... urrrm, can't remember... an umbrella
term for the whole range of verification products - I guess
Steven Sharp may clarify. Neither of these is the name
of a command - rather, they're names for a collection of
programs sold as a single product.

ncsim is the simulator, and yes, it has somewhat the same
status as vsim - you can run it in GUI or text-only modes,
and you tell it what simulation model you want it to run.
The big difference is that vsim does the elaboration step
when it starts-up, whereas in the Cadence tools you run
the elaborator tool 'ncelab' as an independent step:

task Cadence Modelsim
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compile Verilog ncvlog vlog
elaborate the design ncelab (done by vsim)
simulate the design ncsim vsim

ncverilog is a single-step compile/elaborate/run command;
Modelsim has a similar command "qverilog".

The 'nclaunch' tool provides a useful way to start
learning how to use the Cadence tools, as it lets
you drive all this stuff from a single GUI.

RTFM or ask your Cadence rep for the full details.
--
Jonathan Bromley, Consultant

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