Attendees:
Mark Hahn, Cadence (Chair)
Bob Dilly, IBM
Jeff Handong, Cadence
Vikas Sharma, IBM
New action items:
Who When What
---------- ------ --------
1. Mark 5/4 Work with Jeff and Ed to come up with
the golden DCDL script for the demo
Open action items:
Who When What
---------- ------ --------
1. Mark 4/20 Close on DAC demo participation from
-> 5/4 Synplicity, Altera
2. Bob 4/20 Determine whether an NDA is required for the
-> 4/27 library data
3. Mark 3/2 Add operating conditions to the taxonomy
-> 3/30
-> 4/13
-> 5/4
4. Mark 4/27 Send example of how the DAC demo subset
-> 5/4 would be extended with typical values
Closed action items:
Who When What
---------- ------ --------
1. Mark 4/27 Send modified version of processor design
to IBM
Next Meeting:
The next meeting will be a teleconference on 5/4
from 9-11 am (PDT).
Details:
1. Review action items
The library NDA question is not yet fully resolved, but we're
proceeding with the assumption that no NDA is required.
2. Discuss typical values for environment conditions
We talked briefly about this, pending completion of Mark's
action item. This will not be part of the DAC subset, in
any case. This is a complicated topic, involving multiple
operating conditions, correlated versus uncorrelated variation,
the ability to generate SDF, and the implications on the internal
data structures required within tools.
2. Discuss DAC demo
The IBM library was successfully translated to TLF using a
workaround. Cadence will enhance the next version of the
translator to address the limitations.
IBM is mostly done with the support for the BuildGates
commands in their translator, and adding the DCDL support
is expected to take a couple of days.
We talked about units: should there be default units or not?
The advantage of having a default is that it's easier for
designers when the default matches the units the designer
wants. The disadvantage is that the designer may not realize
that the default doesn't match the units they want, leading
to erroneous results.
Mark proposed defining a set of default units, but requiring
that the units be explicitly specified. As a shorthand for
saying that the default units are desired, there would be a
"units -default" command. We talked briefly about what the
default values should be: time is a tricky one, because over
the next couple of years the natural units for time will
shift from ns to ps for many designs. However, many libraries
use ns today.
Thanks,
Mark
-- Mark Hahn phone: (408) 428-5399 Senior Architect fax: (408) 428-5959 Cadence Design Systems email: mhahn@cadence.com