From 00bc28a1c997254175f3e9971a0f9601136783f9 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Fri, 22 Jan 2021 20:32:47 -0700
Subject: [PATCH] Liberty is_level_shifter

---
 include/sta/Liberty.hh      |  3 +++
 liberty/Liberty.cc          |  7 +++++++
 liberty/LibertyReader.cc    | 12 ++++++++++++
 liberty/LibertyReaderPvt.hh |  1 +
 4 files changed, 23 insertions(+)

diff --git a/include/sta/Liberty.hh b/include/sta/Liberty.hh
index d01c91eb..145bdf74 100644
--- a/include/sta/Liberty.hh
+++ b/include/sta/Liberty.hh
@@ -413,6 +413,8 @@ public:
   void setIsMemory(bool is_memory);
   bool isPad() const { return is_pad_; }
   void setIsPad(bool is_pad);
+  bool isLevelShifter() const { return is_level_shifter_; }
+  void setIsLevelShifter(bool is_level_shifter);
   bool interfaceTiming() const { return interface_timing_; }
   void setInterfaceTiming(bool value);
   bool isClockGateLatchPosedge() const;
@@ -536,6 +538,7 @@ protected:
   bool is_macro_;
   bool is_memory_;
   bool is_pad_;
+  bool is_level_shifter_;
   bool has_internal_ports_;
   bool interface_timing_;
   ClockGateType clock_gate_type_;
diff --git a/liberty/Liberty.cc b/liberty/Liberty.cc
index e7d58844..0b3a3d5c 100644
--- a/liberty/Liberty.cc
+++ b/liberty/Liberty.cc
@@ -852,6 +852,7 @@ LibertyCell::LibertyCell(LibertyLibrary *library,
   is_macro_(false),
   is_memory_(false),
   is_pad_(false),
+  is_level_shifter_(false),
   has_internal_ports_(false),
   interface_timing_(false),
   clock_gate_type_(ClockGateType::none),
@@ -1008,6 +1009,12 @@ LibertyCell::LibertyCell::setIsPad(bool is_pad)
   is_pad_ = is_pad;
 }
 
+void
+LibertyCell::LibertyCell::setIsLevelShifter(bool is_level_shifter)
+{
+  is_level_shifter_ = is_level_shifter;
+}
+
 void
 LibertyCell::setInterfaceTiming(bool value)
 {
diff --git a/liberty/LibertyReader.cc b/liberty/LibertyReader.cc
index 1ac77ae3..8489d654 100644
--- a/liberty/LibertyReader.cc
+++ b/liberty/LibertyReader.cc
@@ -289,6 +289,7 @@ LibertyReader::defineVisitors()
   defineAttrVisitor("is_macro", &LibertyReader::visitIsMacro);
   defineAttrVisitor("is_memory", &LibertyReader::visitIsMemory);
   defineAttrVisitor("is_pad", &LibertyReader::visitIsPad);
+  defineAttrVisitor("is_level_shifter", &LibertyReader::visitIsLevelShifter);
   defineAttrVisitor("interface_timing", &LibertyReader::visitInterfaceTiming);
   defineAttrVisitor("scaling_factors", &LibertyReader::visitScalingFactors);
 
@@ -2456,6 +2457,17 @@ LibertyReader::visitIsPad(LibertyAttr *attr)
   }
 }
 
+void
+LibertyReader::visitIsLevelShifter(LibertyAttr *attr)
+{
+  if (cell_) {
+    bool is_level_shifter, exists;
+    getAttrBool(attr, is_level_shifter, exists);
+    if (exists)
+      cell_->setIsLevelShifter(is_level_shifter);
+  }
+}
+
 void
 LibertyReader::visitInterfaceTiming(LibertyAttr *attr)
 {
diff --git a/liberty/LibertyReaderPvt.hh b/liberty/LibertyReaderPvt.hh
index b18a3863..e45a516c 100644
--- a/liberty/LibertyReaderPvt.hh
+++ b/liberty/LibertyReaderPvt.hh
@@ -184,6 +184,7 @@ public:
   virtual void visitIsMacro(LibertyAttr *attr);
   virtual void visitIsMemory(LibertyAttr *attr);
   virtual void visitIsPad(LibertyAttr *attr);
+  void visitIsLevelShifter(LibertyAttr *attr);
   virtual void visitInterfaceTiming(LibertyAttr *attr);
   virtual void visitScalingFactors(LibertyAttr *attr);
   virtual void visitCellLeakagePower(LibertyAttr *attr);