IEEE P1076.1 Working Group - Table-Driven Modeling Project - Telco Meeting Minutes of April 9, 2012

Status: approved on May 14, 2012

Attendees

• Ernst Christen
• Arpad Muranyi
• Joachim Haase (meeting convener, note taker)

Agenda

• Call to order
• Volunteer for minutes
• Approval of agenda
• Review and approve minutes from the last meeting
• Status of reference implementation v0.9 using VHDL 2008
• Documentation
• Next meeting
• AOB
• Adjourn

Call to order on April 9, 2012 at 8:00 am PDT (17:00 CEST)

Joachim opens the meeting and started to present the meeting slides (ppt).

Volunteer for minutes

Joachim takes the notes.

Approval of agenda

Agenda unanimously approved.

Review and approve minutes from last meeting

Ernst agreed to approve the Minutes of the January 30, 2011 meeting after minor changes (extension of list of attendees with David Smith). The March 5, 2012 meeting was canceled.

Status of the reference implementation

Details concerning the status are shown in the meeting slides . Implementation of the package body is based on VHDL 2008. Udates were done regarding the subsequent topics

• The DEPENDENT_SELECTOR in the case of complex-valued one-dimensional interpolation points to a group of two columns that decsribe a complex number.
• A type REAL_MATRIX (available in VHDL 2002) instead of REAL_VECTOR_ARRAY (only available in VHDL 2008) is used to provide data points for multi-dimensional interpolation in the associated PREPARE_TABLE_DATA function.

For PREPARE_TABLE_DATA functions that read data from a file, an additional argument and corresponding type was required to describe file formats (such as Touchstone, ...). This is yet a open issue.

Discussion open questions concerning a standard proposal

Ernst will check how generic functions (introduced in VHDL 2008) can be used to hide the declaration of types TABLE_DATA_REAL and TABLE_DATA_COMPLEX. The standard proposal shall not restrict tool implementors to use their own optimized data structures.

Arpad points towards potential problems reading in Touchstone files. There are some difference between version 1.0 and the subsequent version of the format. Ernst reminds that the reference implementation cannot provide the full code for read in all file formats. However, the proposal shall provide standardized file headers. This has to be considered by introducing appropriate file format arguments for the PREPARE_TABLE_DATA functions (see also the previous topic).

Arpad will provide material on the Touchstone specification version 2.0.

Next meeting

The next web meeting is planned on Monday, May 7, 2012 at 8am PDT or 17:00 CEST.

AOB

None.

Adjourn

Joachim adjourns the meeting at 17:45 CEST.

Action items

Ernst:

• Contact to ISAC (VHDL) concerning the declaration of types TABLE_DATA_REAL and TABLE_DATA_COMPLEX using generic functions provided in VHDL 2008

Joachim:

• Update of the reference implementation using VHDL 2008