[vhdl-200x] Approval for Merger of 1164 into 1076

Subject: [vhdl-200x] Approval for Merger of 1164 into 1076
From: Bailey, Stephen (SBailey@model.com)
Date: Sun Feb 22 2004 - 16:12:36 PST

This is a call for vote. The issue being voted on is:

Approval of the merger of 1164 standard into the 1076 standard.

  ___ Approve (comments are optional)

  ___ Disapprove (please provide comments)

  ___ Abstain


The 1164 standard defines the package std_logic_1164 which defines the std_[u]logic and std_[u]logic_vector types, resolution function and various overloaded and non-overloaded operations on these types. The 1164 standard is defined entirely in legal VHDL source code.

The benefits of merging the two standards include:

  - Easier maintenance in keeping the two standards synchronized. (The importance of synchronized maintenance is very high considering that something approaching 100% of designs use this package.)

  - Ability for 1076 to more proactively analyze, research and resolve requests for enhancements to 1164 in ways that may require language enhancements to maximize the value. (For example, some ability to exploit std_logic's don't care ('-') state such that it can be used in matching/equality expressions and in case statements.)

  - Reduction in DASC bureaucracy and, hopefully, an increase in operational efficiency of the two tightly related groups. Although not a primary consideration, the DASC SC, at the recent DATE meeting, did request that both 1164 and 1076 WGs explore the merger of the two groups.

While merging these two WGs would establish a precedent of sorts, it by no means indicates that all 1076-related standards will be merged into 1076. For many 1076-related standards (1076.6, 1076.1, 1076.1.1 and, probably 1076.3), there are reasons to keep the WGs separate. For example, 1076.6 defines synthesis semantics/inference while 1076 defines simulation semantics; 1076.3 (math packages) could be generalized to cover Verilog as well as VHDL and the 1076.1 and 1076.1.1 WGs' scope is analog whereas 1076 is digital. Therefore, please evaluate this proposed merger solely within the context of what is proposed.

Peter Ashenden, as chair of 1164, is concurrently seeking the approval of the 1164 WG membership for this merger.

Please submit your vote to me (sbailey@model.com) by 8 March 2004. Any discussion can be submitted to the entire WG at vhdl-200x@eda.org.

Thank you.

Stephen Bailey
TME, Mentor Graphic's Model Technology Group
303-775-1655 (mobile, preferred)
720-494-1202 (office)

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