( ESNUG 234 Item 4 ) ---------------------------------------------- [3/14/96]
From: seahuh@sea.ericsson.se (Hartmut Huber)
Subject: Not ALL VHDL Is Created Equal: Synopsys/Leapfrog Library Issues
Hi John!
We are just starting an ASIC design. Setting up the environment, we found
out, that our ASIC vendor (TI) uses both the Synopsys IEEE (etc.) libraries
and Leapfrog's (we are using Cadence Leapfrog for simulation). Simulation
only modules use the Leapfrog libraries but synthesizable modules use it too.
But, when it comes to synthesis, Synopsys' libraries have to be used instead.
Now, it seems just to be impossible to use the same set of libraries both for
synthesis and simulation. Since that libraries and modules have are not new,
it seems odd, that nobody before was as strict as we about that. Maybe it's
not an issue at all? (Synopsys, Inc. told us to use the same set but could
give no reason for that!) After all, both sets of libraries have the same
functionality (IEEE & some more "standard" libs) and SHOULD be exchangeable.
Does anyone know what's really going on and how to handle this?
- Hartmut Huber
Ericsson Schrack
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