P1076 June 26, 2014 Meeting Minutes

Attendees:

• CliffordWalinsky * JimLewis * DavidBishop * StevenDovich *

Agenda:

Action Item Review

Items marked completed before meeting

• ISAC IR2125 StdulogicResolution Done
  • Proposes either modifying Resolved or creating an alternate one
  • Recommends creating an alternate one in an open source package
• ISAC IR2113 ReadRom Done
  • Proposes creating types and File IO functions for Memory Arrays
  • David has seen a ReadMemV. It would be convenient to use that naming.
• ISAC IR2003 MultiCyclePath Done
  • Creates a tracking proposal without any solution.
• ISAC IR2108 WaitLevel Done
  • Level sensitive check - A "wait" that checks condition before stopping
  • Focus is on updating language to support passing an expression to a input signal parameter, however, as pointed out in the proposal this has issues since an expression passed to a signal parameter will have the left most value of the type. Here that is ok since it is false.
• Object Orientation - Done
  • Jim: added tracking proposal done
  • Needs justification and use models added to proposal
  • Added links to Peter's protected type proposal, Suave, and VHDL Plus
• Dynamic Processes, Instances, Fork and Join - Jim: Added Tracking Proposal
  • 2012_MeetingJune21
  • Original Verilog, simple fork and join - not used much. Hence, not much value in implementing a simple mechanism
  • SV - more complicated and have ability to kill later
• MultipleDesignHierarchies
  • Cliff: Multiple Hierarchy Roots
  • Monitor Entity/Architecture watching things in the design, ...

Things Done During Meeting

• Need more reviewers of matrix math package
  • Ryan, Martin
  • Building a list of change proposals
  • Proposal of operators such as ".*"
• P1735 - Is in its finalization stages.
  • Steve to start on reconciliation into what we need to update in VHDL
• Open - technical leader for 1076.6 activities?
  • std_logic_1164 uses 1076.6 attribute "RTL_SYNTHESIS_OFF" and "RTL_SYNTHESIS_ON"
• Martin - 2033 - Increment operator with modulo wrap around.
  • One Option: Does ADA do something like this? Can it be done as a subtype constraint?
  • Another Option: Add inc / dec packages or to standard packages?
• Ryan: Arbitrary width real: see Nov 8 2012 meeting
• Open - Multi dimensional Array restructuring: Array <--> Matrix Transformations 2012_MeetingJuly19 MeetingDecember15
  • Matlab has built-in reshape functions
  • In VHDL - explicit vs implicit defined operator
  • David Bishop: Requiring an implicit operator could delay implementations
  • Can this be handled by anonymous types on interfaces or generics on a package?
  • Language facility for creating implicit operators?
• Ryan - Slicing Multidimensional Arrays (FT15) maybe related to above 2012_MeetingMay24
• David Bishop: Bugzilla 17 - add_carry in numeric_std as well as fixed/floating packages
  • In the fixed point package, but not floating point package.
  • Not in numeric_std. Add for consistency?
• David Bishop: Bugzilla 15 - Should numeric_bit/std have resize with size_res parameter?
  • David proposed it for consistency with the fixed and floating point packages
• David Bishop - 262 - Fixed Generic Pkg and checking valid range
• Jim - Mark bugzillas for which we have a proposal with that status
• Jim - Table driven modeling via protected types 2012_MeetingMay10
• Jim - 2109 - Requests semaphore implementation via a protected type
  • Requires wait inside of a protected type
  • ?Requires signal inside of a protected type?
  • Also interested in a resolution function based semaphore implementation
• OPEN - 2026 - Upward propagating Generics.
  • Would an external name reference to a constant accomplish some of the intent here?
  • An "OUT" generic would need to have similar constraints to the external name usage.
  • One use models: Out generic of one design connecting to in generic of another.
  • Need other use models

Ranking Criteria

• Rank based on need
  • Item needs to be fixed
  • Useful for an application
• Rank based on complexity
  • How hard to implement
• Noted several items in Collected Requirements as Must Do
• AI: Jim: Create ranking sheet.

Review and Approve Meeting Minutes:

• Motion: Cliff 2nd: Steve

Next Meeting: Thursday July 10, 2014 8 am Pacific

Previous Meeting: Thursday Thursday June 12, 2014