Added PC histogram option.

  - Spits out all PCs (on 4B granularity) executed with count.
  - Requires a compile time configuration option.
  - Also requires a run-time flag.

1 files changed, 2 insertions, 0 deletions

diff --git a/riscv/sim.h b/riscv/sim.h
index d437c1a..9e1362e 100644
--- a/riscv/sim.h
+++ b/riscv/sim.h
@@ -23,6 +23,7 @@ public:
   bool running();
   void stop();
   void set_debug(bool value);
+  void set_histogram(bool value);
   void set_procs_debug(bool value);
   htif_isasim_t* get_htif() { return htif.get(); }
 
@@ -48,6 +49,7 @@ private:
   size_t current_step;
   size_t current_proc;
   bool debug;
+  bool histogram_enabled; // provide a histogram of PCs
 
   // presents a prompt for introspection into the simulation
   void interactive();