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Routing Results

Are the new switches useful? Yes!


  1. new switches
    • use constant delay model
    • worst-case intrinsic delays
    • based on fanout-3

  2. modify VPR to model fanout delay

  3. measure critical path delay,
    fanout delay:
    • old buf: +5% avg, 16% worst-case
    • new bufm: +1% avg, +5% worst-case

  4. bufm better than bufp
Normalized Results
4-input LUT,
6 LUTs per cluster
Buffer
Type 		Area Delay Area*Delay
buf 1.0 1.0 1.0
bufp 0.97 0.98 0.95
bufm 0.97 0.93 0.91