From fdba9eb279ae353abc16ff9be62d2097f6235182 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Wed, 23 Nov 2022 22:17:07 -0800
Subject: [PATCH] power activity thru regs caps at 1/clk_period

Signed-off-by: James Cherry <cherry@parallaxsw.com>
---
 include/sta/PowerClass.hh |  2 ++
 power/Power.cc            | 21 ++++++++++++++++++---
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/include/sta/PowerClass.hh b/include/sta/PowerClass.hh
index 3482b9f0..dbfeb168 100644
--- a/include/sta/PowerClass.hh
+++ b/include/sta/PowerClass.hh
@@ -38,7 +38,9 @@ public:
 	      float duty,
 	      PwrActivityOrigin origin);
   float activity() const { return activity_; }
+  void setActivity(float activity);
   float duty() const { return duty_; }
+  void setDuty(float duty);
   PwrActivityOrigin origin() { return origin_; }
   const char *originName() const;
   void set(float activity,
diff --git a/power/Power.cc b/power/Power.cc
index 0144ea3d..5a7e62e3 100644
--- a/power/Power.cc
+++ b/power/Power.cc
@@ -572,10 +572,13 @@ Power::seedRegOutputActivities(const Instance *reg,
   const Pin *out_pin = network_->findPin(reg, output);
   if (!hasUserActivity(out_pin)) {
     PwrActivity activity = evalActivity(seq->data(), reg);
+    // Register output activity cannnot exceed one transition per clock cycle,
+    // but latch output can.
+    if (seq->isRegister()
+        && activity.activity() > 1.0)
+      activity.setActivity(1.0);
     if (invert)
-      activity.set(activity.activity(),
-                   1.0 - activity.duty(),
-                   activity.origin());
+      activity.setDuty(1.0 - activity.duty());
     setSeqActivity(reg, output, activity);
   }
 }
@@ -1190,6 +1193,18 @@ PwrActivity::PwrActivity() :
   check();
 }
 
+void
+PwrActivity::setActivity(float activity)
+{
+  activity_ = activity;
+}
+
+void
+PwrActivity::setDuty(float duty)
+{
+  duty_ = duty;
+}
+
 void
 PwrActivity::set(float activity,
 		 float duty,