P1076 June 26, 2014 Meeting Minutes



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

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Topic revision: r8 - 2014-06-26 - 16:18:44 - JimLewis
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