From aed885ecc5028311d276c48072aeb226f2918c86 Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Mon, 10 Apr 2006 02:40:18 +0000
Subject: [PATCH]  Add support for generate loops w/ wires and gates.

---
 PGenerate.cc | 57 ++++++++++++++++++++++++++++++++
 PGenerate.h  | 92 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 149 insertions(+)
 create mode 100644 PGenerate.cc
 create mode 100644 PGenerate.h

diff --git a/PGenerate.cc b/PGenerate.cc
new file mode 100644
index 000000000..272f5f1fb
--- /dev/null
+++ b/PGenerate.cc
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2006 Stephen Williams (steve@icarus.com)
+ *
+ *    This source code is free software; you can redistribute it
+ *    and/or modify it in source code form under the terms of the GNU
+ *    General Public License as published by the Free Software
+ *    Foundation; either version 2 of the License, or (at your option)
+ *    any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+#ifdef HAVE_CVS_IDENT
+#ident "$Id: PGenerate.cc,v 1.1 2006/04/10 02:40:18 steve Exp $"
+#endif
+
+# include  "PGenerate.h"
+# include  "PWire.h"
+
+PGenerate::PGenerate(unsigned id)
+: id_number(id)
+{
+}
+
+PGenerate::~PGenerate()
+{
+}
+
+PWire* PGenerate::add_wire(PWire*wire)
+{
+      PWire*&ep = wires[wire->path()];
+      if (ep) return ep;
+
+      assert(ep == 0);
+      ep = wire;
+      return wire;
+}
+
+PWire* PGenerate::get_wire(const hname_t&name) const
+{
+      map<hname_t,PWire*>::const_iterator obj = wires.find(name);
+      if (obj == wires.end())
+	    return 0;
+      else
+	    return (*obj).second;
+}
+
+void PGenerate::add_gate(PGate*gate)
+{
+      gates.push_back(gate);
+}
diff --git a/PGenerate.h b/PGenerate.h
new file mode 100644
index 000000000..9b5ef76fc
--- /dev/null
+++ b/PGenerate.h
@@ -0,0 +1,92 @@
+#ifndef __PGenerate_H
+#define __PGenerate_H
+/*
+ * Copyright (c) 2006 Stephen Williams (steve@icarus.com)
+ *
+ *    This source code is free software; you can redistribute it
+ *    and/or modify it in source code form under the terms of the GNU
+ *    General Public License as published by the Free Software
+ *    Foundation; either version 2 of the License, or (at your option)
+ *    any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+#ifdef HAVE_CVS_IDENT
+#ident "$Id: PGenerate.h,v 1.1 2006/04/10 02:40:18 steve Exp $"
+#endif
+
+# include  "LineInfo.h"
+# include  "StringHeap.h"
+# include  "HName.h"
+# include  <list>
+# include  <map>
+
+class Design;
+class NetScope;
+class PExpr;
+class PGate;
+class PWire;
+
+/*
+ * This represents a generate scheme.
+ */
+class PGenerate : public LineInfo {
+
+    public:
+      PGenerate(unsigned id_number);
+      ~PGenerate();
+
+	// Generate schemes have an ID number, for when the scope is
+	// implicit.
+      const unsigned id_number;
+      perm_string scope_name;
+
+      enum scheme_t {GS_NONE, GS_LOOP, GS_CONDIT};
+      scheme_t scheme_type;
+
+	// generate loops have an index variable and three
+	// expressions: for (index = <init>; <test>; index=<step>)
+      perm_string loop_index;
+      PExpr*loop_init;
+      PExpr*loop_test;
+      PExpr*loop_step;
+
+      map<hname_t,PWire*>wires;
+      PWire* add_wire(PWire*);
+      PWire* get_wire(const hname_t&name) const;
+
+      list<PGate*> gates;
+      void add_gate(PGate*);
+
+	// This method is called by the elaboration of a module to
+	// generate scopes. the container is the scope that is to
+	// contain the generated scope.
+      bool generate_scope(Design*des, NetScope*container);
+
+      bool elaborate_sig(Design*des) const;
+      bool elaborate(Design*des) const;
+
+      void dump(ostream&out) const;
+
+    private:
+      bool generate_scope_loop_(Design*des, NetScope*container);
+
+	// These are the scopes created by generate_scope.
+      list<NetScope*>scope_list_;
+	// internal function called on each scope generated by this scheme.
+      bool elaborate_sig_(Design*des, NetScope*scope) const;
+      bool elaborate_(Design*des, NetScope*scope) const;
+
+    private: // not implemented
+      PGenerate(const PGenerate&);
+      PGenerate& operator= (const PGenerate&);
+};
+
+#endif