( ESNUG 430 Item 3 ) --------------------------------------------- [06/16/04]

From: Jagan Thinakaran <jagan.thinakaran=user  domain=st got calm>
Subject: compile_new_optimization Turns On Gain-based Synthesis in DC?

Hi John,

I was going through Design Compiler variable list and I came across this
peculiar variable:

                 compile_new_optimization = "false"

The following is an excerpt from its Synopsys man page:

  "Controls which optimization algorithms Design Compiler uses.  When true,
   the new optimization algorithms in Design Compiler are turned on.  This
   switch should be used in conjunction with the set_ultra_optimization
   command, which checks out a DC-Ultra license.  The new optimization 
   algorithms leverage a new gain-based delay model that is automatically
   derived using library analysis."

I set the variable to "true" and compiled a small design.  Can't say I saw 
any difference.  I was wondering if anyone else has tried it.

    - Jagan Thinakaran
      STMicroelectronics Asia Pac Pte Ltd.