synopsys ..." and interprets the "full_case" directive to mean that if a case statement is not "full" that the outputs are "don't care's" for all unspecified case items. If the case statement includes a case default, the "full_case" directive will be ignored. Example 3 shows a ca...
1,if the case is parallel, then use case is faster than use if else ,even the two has the same function.So,if your expression is mutually exclusive,then use case. 2,If your expression is not mutually exclusive,use if else ,then, it will be synthesed to priority encodeed circuits, us...
SystemVerilog's priority & unique - A Solution to Verilog's "full_case" & "parallel_case" Evil Twins! Clifford E. Cummings Sunburst Design, Inc. ABSTRACT At Boston SNUG 1999, I introduced the evil twins of Verilog synthesis, "full_case" and "parallel_case.[2]" In the 1999 Boston ...
"full_caseparallel_case",theEvilTwinsofVerilogSynthesisCliffordE.CummingsSunburstDesign,Inc.ABSTRACTTwoofthemostoverusedandabuseddirectiv..
内容提示: "full_case parallel_case", the Evil Twins of VerilogSynthesisClifford E. CummingsSunburst Design, Inc.ABSTRACTTwo of the most over used and abused directives included in Verilog models are the directives"//synopsys full_case parallel_case". The popular myth that exists surrounding "...
Clifford Cummings
"full_case parallel_case", the Evil Twins of Verilog Synthesis SNUG-1999 Boston, MA Voted Best Paper 1st Place Clifford E. Cummings Sunburst Design, Inc. ABSTRACT Two of the most over used and abused directives included in Verilog models are the directives "//synopsys full_case parallel_...
内容提示: "full_case parallel_case", the Evil Twins of VerilogSynthesisClifford E. CummingsSunburst Design, Inc.ABSTRACTTwo of the most over used and abused directives included in Verilog models are the directives"//synopsys full_case parallel_case". The popular myth that exists surrounding "...
So it's effectively just an inverted priority, no use for this attributes. In addition, I would follow IEEE 1364.1 (Standard for Verilog RTL synthesis) that opts against usage of th full- and parallel_case attributes in synthesized Verilog. Translate 0 Kudos Copy link Reply ...
SystemVerilog Saves the Day—the Evil Twins are Defeated!"unique" and "priority" are the new Heroes The villains of synthesis for many a design are the "parallel_case" and "full_case" synthesis pragmas. The dastardly deeds of these infamous pragmas have been well documented in a past ...