02 July 2013

How Hardware s Inferred- if vs case

5.2.5. if vs case

Multiflexer is faster circuit. Therefore is priority encoding structure is not required then use ‘case’ staements instead of ‘if-else’ statement.

Use late arriving signal early in an ‘if-else’ loop to keep these late arriving signals with critical timing closest to the output of a logic block.


[HM] Himanshu Bhatnagar, Advanced ASIC chip Synthesis Using Synopsys Design Compiler, Physical Compiler and PrimeTime, Kluwer Academic Publishers, Second edition, 2002
[DC] Design Compiler® User Guide, Version X-2005.09, September 2005
[RC] Using Encounter® RTL Compiler, Product Version 8.1.202, April 2009
[BH] J. Bhasker, Rakesh Chadha, Static Timing Analysis for Nanometer Designs A Practical Approach, 2009

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