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crpr for clk paths 

Signed-off-by: James Cherry <cherry@parallaxsw.com>
This commit is contained in:
James Cherry 2024-12-11 11:09:35 -08:00
parent a976bbacab
commit bbffa9b493
4 changed files with 40 additions and 28 deletions
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37
include/sta/Search.hh
View File

@ -238,25 +238,26 @@ public:
const RiseFall *to_rf, const RiseFall *to_rf,
const MinMax *min_max, const MinMax *min_max,
const PathAnalysisPt *path_ap); const PathAnalysisPt *path_ap);
virtual Tag *thruTag(Tag *from_tag, Tag *thruTag(Tag *from_tag,
Edge *edge, Edge *edge,
const RiseFall *to_rf, const RiseFall *to_rf,
const MinMax *min_max, const MinMax *min_max,
const PathAnalysisPt *path_ap); const PathAnalysisPt *path_ap);
virtual Tag *thruClkTag(PathVertex *from_path, Tag *thruClkTag(PathVertex *from_path,
Tag *from_tag, Tag *from_tag,
bool to_propagates_clk, bool to_propagates_clk,
Edge *edge, Edge *edge,
const RiseFall *to_rf, const RiseFall *to_rf,
const MinMax *min_max, const MinMax *min_max,
const PathAnalysisPt *path_ap); const PathAnalysisPt *path_ap);
ClkInfo *thruClkInfo(PathVertex *from_path, ClkInfo *thruClkInfo(PathVertex *from_path,
ClkInfo *from_tag_clk, ClkInfo *from_clk_info,
Edge *edge, bool from_is_clk,
Vertex *to_vertex, Edge *edge,
const Pin *to_pin, const Pin *to_pin,
const MinMax *min_max, bool to_is_clk,
const PathAnalysisPt *path_ap); const MinMax *min_max,
const PathAnalysisPt *path_ap);
ClkInfo *clkInfoWithCrprClkPath(ClkInfo *from_clk_info, ClkInfo *clkInfoWithCrprClkPath(ClkInfo *from_clk_info,
PathVertex *from_path, PathVertex *from_path,
const PathAnalysisPt *path_ap); const PathAnalysisPt *path_ap);

4
search/ClkInfo.hh
View File

@ -54,8 +54,8 @@ public:
const Arrival &insertion() const { return insertion_; } const Arrival &insertion() const { return insertion_; }
ClockUncertainties *uncertainties() const { return uncertainties_; } ClockUncertainties *uncertainties() const { return uncertainties_; }
PathAPIndex pathAPIndex() const { return path_ap_index_; } PathAPIndex pathAPIndex() const { return path_ap_index_; }
// Clock path for the last driver in the clock network used for // Clock path used for crpr resolution.
// crpr resolution. // Null for clocks because the path cannot point to itself.
PathVertexRep &crprClkPath() { return crpr_clk_path_; } PathVertexRep &crprClkPath() { return crpr_clk_path_; }
const PathVertexRep &crprClkPath() const { return crpr_clk_path_; } const PathVertexRep &crprClkPath() const { return crpr_clk_path_; }
VertexId crprClkVertexId() const; VertexId crprClkVertexId() const;

17
search/Crpr.cc
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@ -152,13 +152,22 @@ CheckCrpr::checkCrpr1(const Path *src_path,
{ {
crpr = 0.0; crpr = 0.0;
crpr_pin = nullptr; crpr_pin = nullptr;
ClkInfo *src_clk_info = src_path->tag(this)->clkInfo(); const Tag *src_tag = src_path->tag(this);
ClkInfo *src_clk_info = src_tag->clkInfo();
ClkInfo *tgt_clk_info = tgt_clk_path->tag(this)->clkInfo(); ClkInfo *tgt_clk_info = tgt_clk_path->tag(this)->clkInfo();
const Clock *src_clk = src_clk_info->clock(); const Clock *src_clk = src_clk_info->clock();
const Clock *tgt_clk = tgt_clk_info->clock(); const Clock *tgt_clk = tgt_clk_info->clock();
const PathVertex src_clk_path1(src_clk_info->crprClkPath(), this); PathVertex src_clk_path1;
const PathVertex *src_clk_path = PathVertexRep &src_crpr_clk_path = src_clk_info->crprClkPath();
src_clk_path1.isNull() ? nullptr : &src_clk_path1; const PathVertex *src_clk_path = nullptr;
if (src_tag->isClock()) {
src_clk_path1.init(src_path->vertex(this), src_path->tag(this), this);
src_clk_path = &src_clk_path1;
}
else if (!src_crpr_clk_path.isNull()) {
src_clk_path1.init(src_crpr_clk_path, this);
src_clk_path = &src_clk_path1;
}
const MinMax *src_clk_min_max = const MinMax *src_clk_min_max =
src_clk_path ? src_clk_path->minMax(this) : src_path->minMax(this); src_clk_path ? src_clk_path->minMax(this) : src_path->minMax(this);
if (src_clk && tgt_clk if (src_clk && tgt_clk

10
search/Search.cc
View File

@ -2417,8 +2417,9 @@ Search::thruClkTag(PathVertex *from_path,
&& to_propagates_clk && to_propagates_clk
&& (role->isWire() && (role->isWire()
|| role == TimingRole::combinational())); || role == TimingRole::combinational()));
ClkInfo *to_clk_info = thruClkInfo(from_path, from_clk_info, ClkInfo *to_clk_info = thruClkInfo(from_path, from_clk_info, from_is_clk,
edge, to_vertex, to_pin, min_max, path_ap); edge, to_pin, to_is_clk,
min_max, path_ap);
Tag *to_tag = mutateTag(from_tag,from_pin,from_rf,from_is_clk,from_clk_info, Tag *to_tag = mutateTag(from_tag,from_pin,from_rf,from_is_clk,from_clk_info,
to_pin, to_rf, to_is_clk, to_is_reg_clk, false, to_pin, to_rf, to_is_clk, to_is_reg_clk, false,
to_clk_info, nullptr, min_max, path_ap); to_clk_info, nullptr, min_max, path_ap);
@ -2429,9 +2430,10 @@ Search::thruClkTag(PathVertex *from_path,
ClkInfo * ClkInfo *
Search::thruClkInfo(PathVertex *from_path, Search::thruClkInfo(PathVertex *from_path,
ClkInfo *from_clk_info, ClkInfo *from_clk_info,
bool from_is_clk,
Edge *edge, Edge *edge,
Vertex *to_vertex,
const Pin *to_pin, const Pin *to_pin,
bool to_is_clk,
const MinMax *min_max, const MinMax *min_max,
const PathAnalysisPt *path_ap) const PathAnalysisPt *path_ap)
{ {
@ -2462,7 +2464,7 @@ Search::thruClkInfo(PathVertex *from_path,
PathVertex *to_crpr_clk_path = nullptr; PathVertex *to_crpr_clk_path = nullptr;
if (sdc_->crprActive() if (sdc_->crprActive()
&& to_vertex->isRegClk()) { && from_is_clk && !to_is_clk) {
to_crpr_clk_path = from_path; to_crpr_clk_path = from_path;
changed = true; changed = true;
} }