IEEE 200X Fast Track Change Proposal

ID:      FT-19

Proposer:     Jim Lewis
email:        Jim@SynthWorks.com

Status:       Proposed
Proposed:     12/03
Analyzed:     Date
Resolved:     Date

Enhancement Summary:  Fuzzy Case
Define boolean equivalence

Related issues:
Relevant LRM sections:   
   7.2 Operators (iff COND is defined as a unary operator) 
   7.2.8 new section to describe semantics of new comparison operators

Enhancement Detail: 
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Fuzzy Case
   furthermore, use ?= to allow a fuzzy case:
     case?
       Uses "?=" for matching targets
       Allows '-' in std_logic targets, except,
       case targets must still be non-overlapping


Comparison Operators that return bit or std_ulogic

  Define fuzzy comparisons that return bit or or std_ulogic:
    ?=, ?/=, ?<, ?>, ?<=, ?>=
    Alternately:  eq, ne, lt, gt, le, ge

    these functions compare std_logic_vector as unsigned and return std_logic
    handle '-'  correctly



Analysis:
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[To be performed by the 200X Fast Track Working Group]


Resolution:
----------------------------
[To be performed by the 200X Fast Track Working Group]