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2013_MeetingAug1
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P1076 August 1, 2013 Meeting Minutes
Attendees:
JimLewis
*
DavidBishop
*
PeterFlake
*
RyanHinton
*
JarekKaczynski
Agenda:
Check closure on AI from review lists.
Review items in the
collected requirements list
Review
ISAC issues and Bugzilla
Math Package Bugs
Floating Point: Conversion to FP from Signed Fixed Point - to_float
Most negative signed fixed point does not get translated correctly - returns 0 instead
fixed on fphdl site
Fixed Point Package: Add_Carry procedure
For signed and unsigned fixed point, the carry out is wrong (returns wrong value)
Can do: (Carry_sl, A_sfixed) <= A_sfixed + 1 ;
Floating and Fixed Point Package: ?/=
Used not ?=
Instead of 'U' you get 'X'
Fixed Point Documentation
Sizing rules on fixed point reciprocal is incorrect. Code is correct
Updated on FPHDL page - see FAQ at bottom is a list of bugs and corrected documentation
fixed on fphdl site
Currently many vendors pulling files from FPHDL page
When vendors switch to using generic version, they are likely to pull the version from IEEE and have bugs.
Math Package Upgrades
IEEE 754/854 updates added 3 rounding routines
Decimal floating point within a binary number
binary floating point has rounding issues
.1 added to itself 10 times will yield a rounding error
New Proposals:
Generic Matrix Package - Ryan
Using packages with type generics
Arbitrary Precision Floating Point- Ryan
Action Item to Ryan to look into constraint methods.
Review of old lists
MP E2 - Eliminate passive statement restriction on entities
Like package/package body, may cause issues for encryption
May complicate analysis process.
Without having an architecture name, would cause issues for configurations, ...
Block statements require a name
Recommendation: Drop
New Items
Configure entity instances - AI: Andy Jones.
Action Items:
Action Item to Ryan to look into constraint methods for type real.
Review and Approve Meeting Minutes:
Motion: Peter 2nd:Ryan (2nd half) / David (first half)
Next Meeting Date (proposed):
Thursday August 29, 8 am Pacific
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Topic revision: r3 - 2020-02-17 - 15:36:12 -
JimLewis
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