From 466ab5c2c70278fef2ee1735bc364c989266adb2 Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Wed, 15 Jun 2005 00:47:15 +0000
Subject: [PATCH]  Resolv do not propogate inputs that do not change.

---
 vvp/resolv.cc  |  8 +++++++-
 vvp/vvp_net.cc | 21 ++++++++++++++++++++-
 vvp/vvp_net.h  |  9 ++++++++-
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/vvp/resolv.cc b/vvp/resolv.cc
index 531dcd8bd..5dd00f5d6 100644
--- a/vvp/resolv.cc
+++ b/vvp/resolv.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #ifdef HAVE_CVS_IDENT
-#ident "$Id: resolv.cc,v 1.23 2005/04/13 06:34:20 steve Exp $"
+#ident "$Id: resolv.cc,v 1.24 2005/06/15 00:47:15 steve Exp $"
 #endif
 
 # include  "resolv.h"
@@ -64,6 +64,9 @@ void resolv_functor::recv_vec8(vvp_net_ptr_t port, vvp_vector8_t bit)
       unsigned pdx = port.port();
       vvp_net_t*ptr = port.ptr();
 
+      if (val_[pdx].eeq(bit))
+	    return;
+
       val_[pdx] = bit;
 
       vvp_vector8_t out (bit);
@@ -90,6 +93,9 @@ void resolv_functor::recv_vec8(vvp_net_ptr_t port, vvp_vector8_t bit)
 
 /*
  * $Log: resolv.cc,v $
+ * Revision 1.24  2005/06/15 00:47:15  steve
+ *  Resolv do not propogate inputs that do not change.
+ *
  * Revision 1.23  2005/04/13 06:34:20  steve
  *  Add vvp driver functor for logic outputs,
  *  Add ostream output operators for debugging.
diff --git a/vvp/vvp_net.cc b/vvp/vvp_net.cc
index 68108a9ec..105be1d59 100644
--- a/vvp/vvp_net.cc
+++ b/vvp/vvp_net.cc
@@ -16,7 +16,7 @@
  *    along with this program; if not, write to the Free Software
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
-#ident "$Id: vvp_net.cc,v 1.31 2005/06/13 00:54:04 steve Exp $"
+#ident "$Id: vvp_net.cc,v 1.32 2005/06/15 00:47:15 steve Exp $"
 
 # include  "config.h"
 # include  "vvp_net.h"
@@ -632,6 +632,22 @@ void vvp_vector8_t::set_bit(unsigned idx, vvp_scalar_t val)
       bits_[idx] = val;
 }
 
+bool vvp_vector8_t::eeq(const vvp_vector8_t&that) const
+{
+      if (size_ != that.size_)
+	    return false;
+
+      if (size_ == 0)
+	    return true;
+
+      for (unsigned idx = 0 ;  idx < size_ ;  idx += 1) {
+	    if (! bits_[idx] .eeq( that.bits_[idx] ))
+		return false;
+      }
+
+      return true;
+}
+
 ostream& operator<<(ostream&out, const vvp_vector8_t&that)
 {
       out << "C8<";
@@ -1393,6 +1409,9 @@ vvp_bit4_t compare_gtge_signed(const vvp_vector4_t&a,
 
 /*
  * $Log: vvp_net.cc,v $
+ * Revision 1.32  2005/06/15 00:47:15  steve
+ *  Resolv do not propogate inputs that do not change.
+ *
  * Revision 1.31  2005/06/13 00:54:04  steve
  *  More unified vec4 to hex string functions.
  *
diff --git a/vvp/vvp_net.h b/vvp/vvp_net.h
index 5fdece21e..ab40d7e0b 100644
--- a/vvp/vvp_net.h
+++ b/vvp/vvp_net.h
@@ -18,7 +18,7 @@
  *    along with this program; if not, write to the Free Software
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
-#ident "$Id: vvp_net.h,v 1.33 2005/06/14 00:42:06 steve Exp $"
+#ident "$Id: vvp_net.h,v 1.34 2005/06/15 00:47:15 steve Exp $"
 
 # include  "config.h"
 # include  <stddef.h>
@@ -196,6 +196,7 @@ class vvp_scalar_t {
       unsigned strength0() const;
       unsigned strength1() const;
 
+      bool eeq(vvp_scalar_t that) const { return value_ == that.value_; }
       bool is_hiz() const { return value_ == 0; }
 
     private:
@@ -233,6 +234,9 @@ class vvp_vector8_t {
       vvp_scalar_t value(unsigned idx) const;
       void set_bit(unsigned idx, vvp_scalar_t val);
 
+	// Test that the vectors are exactly equal
+      bool eeq(const vvp_vector8_t&that) const;
+
       vvp_vector8_t(const vvp_vector8_t&that);
       vvp_vector8_t& operator= (const vvp_vector8_t&that);
 
@@ -756,6 +760,9 @@ class vvp_wide_fun_t : public vvp_net_fun_t {
 
 /*
  * $Log: vvp_net.h,v $
+ * Revision 1.34  2005/06/15 00:47:15  steve
+ *  Resolv do not propogate inputs that do not change.
+ *
  * Revision 1.33  2005/06/14 00:42:06  steve
  *  Accomodate fussy compilers.
  *