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| author | gatecat <gatecat@ds0.me> | 2021-12-19 16:41:34 +0000 |
|---|---|---|
| committer | gatecat <gatecat@ds0.me> | 2021-12-19 17:15:15 +0000 |
| commit | ddb084e9a8a0cba10536951236cde824526e8071 (patch) | |
| tree | d03ba5688367cb476a06b19d04ca78d0352afce3 /nexus/arch.h | |
| parent | 56d550733346000584b9490fac0953fe07124035 (diff) | |
| download | nextpnr-ddb084e9a8a0cba10536951236cde824526e8071.tar.gz nextpnr-ddb084e9a8a0cba10536951236cde824526e8071.tar.bz2 nextpnr-ddb084e9a8a0cba10536951236cde824526e8071.zip | |
archapi: Use arbitrary rather than actual placement in predictDelay
This makes predictDelay be based on an arbitrary belpin pair rather
than a arc of a net based on cell placement. This way 'what-if'
decisions can be evaluated without actually changing placement;
potentially useful for parallel placement.
A new helper predictArcDelay behaves like the old predictDelay to
minimise the impact on existing passes; only arches need be updated.
Signed-off-by: gatecat <gatecat@ds0.me>
Diffstat (limited to 'nexus/arch.h')
| -rw-r--r-- | nexus/arch.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/nexus/arch.h b/nexus/arch.h index edebec1b..0bd1b62c 100644 --- a/nexus/arch.h +++ b/nexus/arch.h @@ -1291,7 +1291,7 @@ struct Arch : BaseArch<ArchRanges> // ------------------------------------------------- delay_t estimateDelay(WireId src, WireId dst) const override; - delay_t predictDelay(const NetInfo *net_info, const PortRef &sink) const override; + delay_t predictDelay(BelId src_bel, IdString src_pin, BelId dst_bel, IdString dst_pin) const override; delay_t getDelayEpsilon() const override { return 20; } delay_t getRipupDelayPenalty() const override; delay_t getWireRipupDelayPenalty(WireId wire) const; |