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-rw-r--r--common/arch_api.h2
-rw-r--r--common/context.cc23
-rw-r--r--common/context.h2
-rw-r--r--common/nextpnr_namespaces.h2
-rw-r--r--common/place_common.cc2
-rw-r--r--common/placer1.cc4
-rw-r--r--common/timing.cc2
-rw-r--r--common/timing_opt.cc8
8 files changed, 34 insertions, 11 deletions
diff --git a/common/arch_api.h b/common/arch_api.h
index e49d26c1..14a30652 100644
--- a/common/arch_api.h
+++ b/common/arch_api.h
@@ -110,7 +110,7 @@ template <typename R> struct ArchAPI : BaseCtx
virtual typename R::GroupPipsRangeT getGroupPips(GroupId group) const = 0;
virtual typename R::GroupGroupsRangeT getGroupGroups(GroupId group) const = 0;
// Delay Methods
- virtual delay_t predictDelay(const NetInfo *net_info, const PortRef &sink) const = 0;
+ virtual delay_t predictDelay(BelId src_bel, IdString src_pin, BelId dst_bel, IdString dst_pin) const = 0;
virtual delay_t getDelayEpsilon() const = 0;
virtual delay_t getRipupDelayPenalty() const = 0;
virtual float getDelayNS(delay_t v) const = 0;
diff --git a/common/context.cc b/common/context.cc
index 6bba5cbe..faddf825 100644
--- a/common/context.cc
+++ b/common/context.cc
@@ -90,6 +90,25 @@ WireId Context::getNetinfoSinkWire(const NetInfo *net_info, const PortRef &sink,
return WireId();
}
+delay_t Context::predictArcDelay(const NetInfo *net_info, const PortRef &sink) const
+{
+ if (net_info->driver.cell == nullptr || net_info->driver.cell->bel == BelId() || sink.cell->bel == BelId())
+ return 0;
+ IdString driver_pin, sink_pin;
+ // Pick the first pin for a prediction; assume all will be similar enouhg
+ for (auto pin : getBelPinsForCellPin(net_info->driver.cell, net_info->driver.port)) {
+ driver_pin = pin;
+ break;
+ }
+ for (auto pin : getBelPinsForCellPin(sink.cell, sink.port)) {
+ sink_pin = pin;
+ break;
+ }
+ if (driver_pin == IdString() || sink_pin == IdString())
+ return 0;
+ return predictDelay(net_info->driver.cell->bel, driver_pin, sink.cell->bel, sink_pin);
+}
+
delay_t Context::getNetinfoRouteDelay(const NetInfo *net_info, const PortRef &user_info) const
{
#ifdef ARCH_ECP5
@@ -98,7 +117,7 @@ delay_t Context::getNetinfoRouteDelay(const NetInfo *net_info, const PortRef &us
#endif
if (net_info->wires.empty())
- return predictDelay(net_info, user_info);
+ return predictArcDelay(net_info, user_info);
WireId src_wire = getNetinfoSourceWire(net_info);
if (src_wire == WireId())
@@ -128,7 +147,7 @@ delay_t Context::getNetinfoRouteDelay(const NetInfo *net_info, const PortRef &us
if (cursor == src_wire)
max_delay = std::max(max_delay, delay + getWireDelay(src_wire).maxDelay()); // routed
else
- max_delay = std::max(max_delay, predictDelay(net_info, user_info)); // unrouted
+ max_delay = std::max(max_delay, predictArcDelay(net_info, user_info)); // unrouted
}
return max_delay;
}
diff --git a/common/context.h b/common/context.h
index 6adbbdb5..cb8fd257 100644
--- a/common/context.h
+++ b/common/context.h
@@ -51,6 +51,8 @@ struct Context : Arch, DeterministicRNG
// --------------------------------------------------------------
+ delay_t predictArcDelay(const NetInfo *net_info, const PortRef &sink) const;
+
WireId getNetinfoSourceWire(const NetInfo *net_info) const;
SSOArray<WireId, 2> getNetinfoSinkWires(const NetInfo *net_info, const PortRef &sink) const;
size_t getNetinfoSinkWireCount(const NetInfo *net_info, const PortRef &sink) const;
diff --git a/common/nextpnr_namespaces.h b/common/nextpnr_namespaces.h
index 6fb0aa77..b758d7c5 100644
--- a/common/nextpnr_namespaces.h
+++ b/common/nextpnr_namespaces.h
@@ -33,6 +33,8 @@
#define USING_NEXTPNR_NAMESPACE
#endif
+#define NPNR_UNUSED(x) ((void)x)
+
#if defined(__GNUC__) || defined(__clang__)
#define NPNR_ATTRIBUTE(...) __attribute__((__VA_ARGS__))
#define NPNR_NORETURN __attribute__((noreturn))
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;
diff --git a/common/placer1.cc b/common/placer1.cc
index 4db1c951..6de035b4 100644
--- a/common/placer1.cc
+++ b/common/placer1.cc
@@ -866,11 +866,11 @@ class SAPlacer
if (ctx->getPortTimingClass(net->driver.cell, net->driver.port, cc) == TMG_IGNORE)
return 0;
if (cfg.budgetBased) {
- double delay = ctx->getDelayNS(ctx->predictDelay(net, net->users.at(user)));
+ double delay = ctx->getDelayNS(ctx->predictArcDelay(net, net->users.at(user)));
return std::min(10.0, std::exp(delay - ctx->getDelayNS(net->users.at(user).budget) / 10));
} else {
float crit = tmg.get_criticality(CellPortKey(net->users.at(user)));
- double delay = ctx->getDelayNS(ctx->predictDelay(net, net->users.at(user)));
+ double delay = ctx->getDelayNS(ctx->predictArcDelay(net, net->users.at(user)));
return delay * std::pow(crit, crit_exp);
}
}
diff --git a/common/timing.cc b/common/timing.cc
index e305d82d..f30d4fc5 100644
--- a/common/timing.cc
+++ b/common/timing.cc
@@ -1378,7 +1378,7 @@ void timing_analysis(Context *ctx, bool print_histogram, bool print_fmax, bool p
auto driver_wire = ctx->getNetinfoSourceWire(net);
auto sink_wire = ctx->getNetinfoSinkWire(net, sink_ref, 0);
log_info(" prediction: %f ns estimate: %f ns\n",
- ctx->getDelayNS(ctx->predictDelay(net, sink_ref)),
+ ctx->getDelayNS(ctx->predictArcDelay(net, sink_ref)),
ctx->getDelayNS(ctx->estimateDelay(driver_wire, sink_wire)));
auto cursor = sink_wire;
delay_t delay;
diff --git a/common/timing_opt.cc b/common/timing_opt.cc
index 6dd93d67..a73a70cf 100644
--- a/common/timing_opt.cc
+++ b/common/timing_opt.cc
@@ -99,7 +99,7 @@ class TimingOptimiser
continue;
for (auto user : net->users) {
if (user.cell == cell && user.port == port.first) {
- if (ctx->predictDelay(net, user) >
+ if (ctx->predictArcDelay(net, user) >
1.1 * max_net_delay.at(std::make_pair(cell->name, port.first)))
return false;
}
@@ -111,7 +111,7 @@ class TimingOptimiser
BelId dstBel = user.cell->bel;
if (dstBel == BelId())
continue;
- if (ctx->predictDelay(net, user) >
+ if (ctx->predictArcDelay(net, user) >
1.1 * max_net_delay.at(std::make_pair(user.cell->name, user.port))) {
return false;
@@ -413,7 +413,7 @@ class TimingOptimiser
for (size_t j = 0; j < pn->users.size(); j++) {
auto &usr = pn->users.at(j);
if (usr.cell == path.at(i)->cell && usr.port == path.at(i)->port) {
- original_delay += ctx->predictDelay(pn, usr);
+ original_delay += ctx->predictArcDelay(pn, usr);
break;
}
}
@@ -497,7 +497,7 @@ class TimingOptimiser
for (size_t j = 0; j < pn->users.size(); j++) {
auto &usr = pn->users.at(j);
if (usr.cell == path.at(i)->cell && usr.port == path.at(i)->port) {
- total_delay += ctx->predictDelay(pn, usr);
+ total_delay += ctx->predictArcDelay(pn, usr);
break;
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 13:30:57 +0000