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inverted equivalent points

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what r inverted equivalent points? how we will come to know some points are inverted equivqlent?


Originally posted in cdnusers.org by sujittikekar1
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  • An inverted equivalent point is one that has the phase inverted.

    Let's say you have a flop with an inverter in front of it. You may get slightly better synthesis results by pushing that inverter through the flop, to its output. Also necessary: flipping any asynch set and/or reset pins.

    Quite a few customer will NOT allow synthesis to do this since it affects a lot of post-synthesis processes and to QoR improvement may not be real.

    Conformal will look for flops with inverted phases only when 'set mapping method -phase' is used. You can also do it manually using 'add mapped point -invert'.

    Chrystian


    Originally posted in cdnusers.org by croy
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  • An inverted equivalent point is one that has the phase inverted.

    Let's say you have a flop with an inverter in front of it. You may get slightly better synthesis results by pushing that inverter through the flop, to its output. Also necessary: flipping any asynch set and/or reset pins.

    Quite a few customer will NOT allow synthesis to do this since it affects a lot of post-synthesis processes and to QoR improvement may not be real.

    Conformal will look for flops with inverted phases only when 'set mapping method -phase' is used. You can also do it manually using 'add mapped point -invert'.

    Chrystian


    Originally posted in cdnusers.org by croy
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