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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 /common/place_common.cc | |
| 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 'common/place_common.cc')
| -rw-r--r-- | common/place_common.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/common/place_common.cc b/common/place_common.cc index bcfa3633..e03fca55 100644 --- a/common/place_common.cc +++ b/common/place_common.cc @@ -50,7 +50,7 @@ wirelen_t get_net_metric(const Context *ctx, const NetInfo *net, MetricType type if (load_cell->bel == BelId()) continue; if (timing_driven) { - delay_t net_delay = ctx->predictDelay(net, load); + delay_t net_delay = ctx->predictArcDelay(net, load); auto slack = load.budget - net_delay; if (slack < 0) negative_slack += slack; |