From 9dbcb32808cb0770300d699c5c3a6ececcf049fe Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Sun, 14 Oct 2001 03:50:53 +0000
Subject: [PATCH]  vvm support for pullup/down gates (PR#288)

---
 t-vvm.cc         | 13 +++++++++++--
 vvm/vvm_gates.cc | 41 ++++++++++++++++++++++++++++++++++++++++-
 vvm/vvm_gates.h  | 29 ++++++++++++++++++++++++++++-
 3 files changed, 79 insertions(+), 4 deletions(-)

diff --git a/t-vvm.cc b/t-vvm.cc
index 192e9f93e..9cd746bb8 100644
--- a/t-vvm.cc
+++ b/t-vvm.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: t-vvm.cc,v 1.212 2001/08/25 23:50:03 steve Exp $"
+#ident "$Id: t-vvm.cc,v 1.213 2001/10/14 03:50:53 steve Exp $"
 #endif
 
 # include "config.h"
@@ -1997,8 +1997,14 @@ void target_vvm::logic(const NetLogic*gate)
 	    out << "static vvm_xor " << mname << "("
 		<< (gate->pin_count()-1 ) << ", ";
 	    break;
+          case NetLogic::PULLDOWN:
+	    out << "static vvm_pulldown " << mname << "(";
+	    break;
+          case NetLogic::PULLUP:
+	    out << "static vvm_pullup " << mname << "(";
+	    break;
 	  default:
-	    out << "#error \"internal ivl error:bad gate type for " <<
+	    out << "#error \"internal ivl error:bad gate type " << gate->type() << " for " <<
 		  gate->name() << "\"" << endl;
       }
 
@@ -3652,6 +3658,9 @@ extern const struct target tgt_vvm = {
 };
 /*
  * $Log: t-vvm.cc,v $
+ * Revision 1.213  2001/10/14 03:50:53  steve
+ *  vvm support for pullup/down gates (PR#288)
+ *
  * Revision 1.212  2001/08/25 23:50:03  steve
  *  Change the NetAssign_ class to refer to the signal
  *  instead of link into the netlist. This is faster
diff --git a/vvm/vvm_gates.cc b/vvm/vvm_gates.cc
index d66d5a846..682f45cbf 100644
--- a/vvm/vvm_gates.cc
+++ b/vvm/vvm_gates.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: vvm_gates.cc,v 1.22 2001/07/25 03:10:50 steve Exp $"
+#ident "$Id: vvm_gates.cc,v 1.23 2001/10/14 03:50:53 steve Exp $"
 #endif
 
 # include "config.h"
@@ -839,8 +839,47 @@ void vvm_xor::take_value(unsigned key, vpip_bit_t val)
       output(compute_xor(input_, width_));
 }
 
+vvm_pullup::vvm_pullup(unsigned d)
+: vvm_1bit_out(d)
+{
+}
+
+void vvm_pullup::start()
+{
+      output(St1);
+}
+
+void vvm_pullup::take_value(unsigned key, vpip_bit_t val)
+{
+}
+
+vvm_pullup::~vvm_pullup()
+{
+}
+
+vvm_pulldown::vvm_pulldown(unsigned d)
+: vvm_1bit_out(d)
+{
+}
+
+void vvm_pulldown::start()
+{
+      output(St0);
+}
+
+void vvm_pulldown::take_value(unsigned key, vpip_bit_t val)
+{
+}
+
+vvm_pulldown::~vvm_pulldown()
+{
+}
+
 /*
  * $Log: vvm_gates.cc,v $
+ * Revision 1.23  2001/10/14 03:50:53  steve
+ *  vvm support for pullup/down gates (PR#288)
+ *
  * Revision 1.22  2001/07/25 03:10:50  steve
  *  Create a config.h.in file to hold all the config
  *  junk, and support gcc 3.0. (Stephan Boettcher)
diff --git a/vvm/vvm_gates.h b/vvm/vvm_gates.h
index 2e2eaced6..ca45da148 100644
--- a/vvm/vvm_gates.h
+++ b/vvm/vvm_gates.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT) && !defined(macintosh)
-#ident "$Id: vvm_gates.h,v 1.71 2001/04/22 23:09:46 steve Exp $"
+#ident "$Id: vvm_gates.h,v 1.72 2001/10/14 03:50:53 steve Exp $"
 #endif
 
 # include  "vvm.h"
@@ -864,6 +864,30 @@ class vvm_bufz  : public vvm_nexus::recvr_t, public vvm_1bit_out {
       void take_value(unsigned, vpip_bit_t val);
 };
 
+/*
+ * The pullup is a trivial device that drives a logic 1 onto its output.
+ */
+class vvm_pullup  : public vvm_nexus::recvr_t, public vvm_1bit_out {
+    public:
+      explicit vvm_pullup(unsigned delay =0);
+      ~vvm_pullup();
+      void start();
+    private:
+      void take_value(unsigned, vpip_bit_t val);
+};
+
+/*
+ * The pulldown is a trivial device that drives a logic 0 onto its output.
+ */
+class vvm_pulldown  : public vvm_nexus::recvr_t, public vvm_1bit_out {
+    public:
+      explicit vvm_pulldown(unsigned delay =0);
+      ~vvm_pulldown();
+      void start();
+    private:
+      void take_value(unsigned, vpip_bit_t val);
+};
+
 /*
  * Threads use the vvm_sync to wait for something to happen. This
  * class cooperates with the various event source classes that receive
@@ -960,6 +984,9 @@ class vvm_posedge  : public vvm_nexus::recvr_t {
 
 /*
  * $Log: vvm_gates.h,v $
+ * Revision 1.72  2001/10/14 03:50:53  steve
+ *  vvm support for pullup/down gates (PR#288)
+ *
  * Revision 1.71  2001/04/22 23:09:46  steve
  *  More UDP consolidation from Stephan Boettcher.
  *