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-rw-r--r--common/timing.cc16
1 files changed, 9 insertions, 7 deletions
diff --git a/common/timing.cc b/common/timing.cc
index d37a0f59..ae5783cd 100644
--- a/common/timing.cc
+++ b/common/timing.cc
@@ -32,15 +32,17 @@ typedef std::map<int, unsigned> DelayFrequency;
struct Timing
{
Context *ctx;
+ bool net_delays;
bool update;
delay_t min_slack;
PortRefVector current_path;
PortRefVector *crit_path;
DelayFrequency *slack_histogram;
- Timing(Context *ctx, bool update, PortRefVector *crit_path = nullptr, DelayFrequency *slack_histogram = nullptr)
- : ctx(ctx), update(update), min_slack(1.0e12 / ctx->target_freq), crit_path(crit_path),
- slack_histogram(slack_histogram)
+ Timing(Context *ctx, bool net_delays, bool update, PortRefVector *crit_path = nullptr,
+ DelayFrequency *slack_histogram = nullptr)
+ : ctx(ctx), net_delays(net_delays), update(update), min_slack(1.0e12 / ctx->target_freq),
+ crit_path(crit_path), slack_histogram(slack_histogram)
{
}
@@ -58,7 +60,7 @@ struct Timing
net_budget = budget;
pl = std::max(1, path_length);
}
- auto delay = ctx->getNetinfoRouteDelay(net, usr);
+ auto delay = net_delays ? ctx->getNetinfoRouteDelay(net, usr) : delay_t();
net_budget = std::min(net_budget, follow_user_port(usr, pl, slack - delay));
if (update)
usr.budget = std::min(usr.budget, delay + net_budget);
@@ -149,10 +151,10 @@ void assign_budget(Context *ctx, bool quiet)
{
if (!quiet) {
log_break();
- log_info("Annotating ports with timing budgets for target frequency %.2f MHz\n", ctx->target_freq/1e6);
+ log_info("Annotating ports with timing budgets for target frequency %.2f MHz\n", ctx->target_freq / 1e6);
}
- Timing timing(ctx, true /* update */);
+ Timing timing(ctx, ctx->slack_redist_iter > 0 /* net_delays */, true /* update */);
timing.assign_budget();
if (!quiet || ctx->verbose) {
@@ -194,7 +196,7 @@ void timing_analysis(Context *ctx, bool print_histogram, bool print_path)
PortRefVector crit_path;
DelayFrequency slack_histogram;
- Timing timing(ctx, false /* update */, print_path ? &crit_path : nullptr,
+ Timing timing(ctx, true /* net_delays */, false /* update */, print_path ? &crit_path : nullptr,
print_histogram ? &slack_histogram : nullptr);
auto min_slack = timing.walk_paths();