P1076 September 11, 2014 Meeting Minutes

Attendees:

• CliffordWalinsky * PeterFlake * JimLewis * DavidKoontz

Agenda:

Action Item Review

Discussion

• Cliff: Garbage Collection
  • Still a work in progress
• Modular types
  • In ADA is an attribute
  • End point is specified
  • Guaranteed to start at 0
  • Alternative (Cliff): Should modulo be done with a different type?
  • AI: Jim, propose a package based approach using record with modulus and integer value
• Peter: Subtypes and Functions
  • Function knowing subtype and/or vector length
  • result'length or target'length. If size is determinable in a given context, then return'length should work within the function body.
  • Inputs to another function or procedure are not necessarily sized.
  • Conclusion: Can't and/or haven't seen a way to go forward here without encoutering significant issues.
  • A mechanism that accesses result'length or target'lenght would potentially slow down all expressions (function calls).

Topics for Future Meetings

• Martin: email to reflector re: Integers and Logic Operators
• Integers: Arbitrary vs. Fixed Size?
• Need more reviewers of matrix math package
• 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
• Jim - Mark bugzillas for which we have a proposal with that status
• Jim - Table driven modeling via protected types 2012_MeetingMay10
• Open - technical leader for 1076.6 activities?
  • std_logic_1164 uses 1076.6 attribute "RTL_SYNTHESIS_OFF" and "RTL_SYNTHESIS_ON"

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: Peter 2nd: Cliff

Next Meeting: Thursday September 25, 2014 8 am Pacific

Previous Meeting: Thursday August 28, 2014