P1076 September 25, 2014 Meeting Minutes

Attendees:

• CliffordWalinsky * MartinThompson * JimLewis * PeterFlake

Agenda:

Action Item Review

Meeting Discussion

• Cliff: Done Garbage Collection
• Peter: Subtypes and Functions - add issues from previous meeting to proposals- in progress
• Jim: Package based implementation of mod (record with modulus and integer value) - in progress
• Martin: Integers and Logic Operators - in progress
• Jim: Add warning to ?? on meta value
• Trace back information from warning in package (such as numeric_std) to line number in entity that caused it.
• Jim: Prepare ranking sheet
• Integers: Arbitrary vs. Fixed Size?
  • A BigNum library type based on integer_vector (or other array type) cannot be used in for loops or indcies of arrays, where as a built in type potentially could.
  • Addressing a large RAM in a simulation.
  • What type of uses are BigNums used for: Are indexing and looping important?
  • How do you express a literal for a BigNum? As a string value or as an Universal Integer?
  • Python integer type is BigNum and uses regular integer values
  • Java has a BigNum package and uses string values or arrays of bytes
  • see: Wikipedia Arbitrary Precision Arithmetic

Topics for Future Meetings

• 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: Martin 2nd:Cliff

Next Meeting: Thursday October 2, 2014 8 am Pacific

Previous Meeting: Thursday September 11, 2014