[DeviceResourcesWriter] Output resource timings for US+ #1001
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Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
…e.resistance.slow.max Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
clavin-xlnx
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src/com/xilinx/rapidwright/interchange/DeviceResourcesWriter.java
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Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
Signed-off-by: Eddie Hung <[email protected]>
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eddieh-xlnx
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| private static DelayEstimatorBase delayEstimator; | ||
| private static DelayModel intrasiteAndLogicDelayModel; | ||
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| private static final float PICSECONDS_TO_SECONDS = 1e-12f; |
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Max delay timings for the following UltraScale+ resources, as described initially by Maidee et al. -- An Open-source Lightweight Timing Model for RapidWright and subsequently implemented in RapidWright:
Device.pipTimings.internalDelay.slow.slow.max.max, capturing the "base" k0+k1*L(TG) component of paper's Equation 1)Device.nodeTimings.capacitance*Device.nodeTimings.resistance, capturing the "discontinuity" k2*d(TG) component of paper's Equation 1; see footnote A)SitePIP.delay.slow.slow.max.maxin seconds)CellBelMapping.pinsDelay.cornerModel.slow.slow.max.maxin seconds)Footnote A -- due to there not being a delay field in
NodeTiming, the discontinuity delay of specific nodes (i.e. those that cross BRAM/URAM/DSP/IO/etc. columns) is captured using the product of theNodeTiming.capacitanceandNodeTiming.resistancefields (T=RC) for a value in second. In this implementation, C is fixed to 1e-12 meaning that R represents the delay in picoseconds.Since bidirectional PIPs (e.g.
INT_X0Y0/INT.INT_NODE_IMUX_5_INT_OUT0<<->>BYPASS_E8) can only reference one delay value, only the forward delay (INT_NODE_*->>BYPASS_E8) is captured.