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Update archapi.md

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Signed-off-by: Clifford Wolf <clifford@clifford.at>
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Clifford Wolf 2018-08-01 11:38:41 +02:00
parent 0038fe268e
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1 changed files with 10 additions and 1 deletions
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docs/archapi.md
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@ -367,7 +367,7 @@ Delay Methods
### delay\_t estimateDelay(WireId src, WireId dst) const
Return an estimate for the total `maxDelay()` delay from the given src wire to
Return a rough estimate for the total `maxDelay()` delay from the given src wire to
the given dst wire.
This should return a low upper bound for the fastest route from `src` to `dst`.
@ -378,6 +378,11 @@ result, and for that estimate it is considered more accaptable to return a
slightly too high result and it is considered less accaptable to return a
too low result (thus "low upper bound").
### delay\_t predictDelay(const NetInfo \*net\_info, const PortRef &sink) const
Return a reasonably good estimate for the total `maxDelay()` delay for the
given arc. This should return a low upper bound for the fastest route for that arc.
### delay\_t getDelayEpsilon() const
Return a small delay value that can be used as small epsilon during routing.
@ -397,6 +402,10 @@ Convert an `delay_t` to an actual real-world delay in nanoseconds.
Convert a `delay_t` to an integer for checksum calculations.
### delay\_t getBudgetOverride(const NetInfo \*net\_info, const PortRef &sink, delay\_t budget) const
Overwrite or modify the timing budget for a given arc. Returns the new budget.
Flow Methods
------------