From ae1d5227de57e9e0b2db9e0fcd33c27a54d8d514 Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Sun, 1 Apr 2001 06:40:44 +0000
Subject: [PATCH]  Support empty statements for hanging labels.

---
 vvp/codes.cc   | 10 +++++++++-
 vvp/codes.h    |  8 +++++++-
 vvp/compile.cc | 16 +++++++++++++++-
 vvp/compile.h  |  6 +++++-
 vvp/parse.y    | 10 +++++++---
 5 files changed, 43 insertions(+), 7 deletions(-)

diff --git a/vvp/codes.cc b/vvp/codes.cc
index 0a26528a0..236394544 100644
--- a/vvp/codes.cc
+++ b/vvp/codes.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: codes.cc,v 1.5 2001/03/22 05:28:41 steve Exp $"
+#ident "$Id: codes.cc,v 1.6 2001/04/01 06:40:44 steve Exp $"
 #endif
 
 # include  "codes.h"
@@ -74,6 +74,11 @@ vvp_cpoint_t codespace_allocate(void)
       return res;
 }
 
+vvp_cpoint_t codespace_next(void)
+{
+      return code_count;
+}
+
 vvp_code_t codespace_index(vvp_cpoint_t point)
 {
       assert(point < code_count);
@@ -121,6 +126,9 @@ void codespace_dump(FILE*fd)
 
 /*
  * $Log: codes.cc,v $
+ * Revision 1.6  2001/04/01 06:40:44  steve
+ *  Support empty statements for hanging labels.
+ *
  * Revision 1.5  2001/03/22 05:28:41  steve
  *  Add code label forward references.
  *
diff --git a/vvp/codes.h b/vvp/codes.h
index 0d85ab119..236e29178 100644
--- a/vvp/codes.h
+++ b/vvp/codes.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: codes.h,v 1.12 2001/04/01 06:12:13 steve Exp $"
+#ident "$Id: codes.h,v 1.13 2001/04/01 06:40:44 steve Exp $"
 #endif
 
 
@@ -87,6 +87,9 @@ extern void codespace_init(void);
  */
 extern vvp_cpoint_t codespace_allocate(void);
 
+extern vvp_cpoint_t codespace_next(void);
+
+
 /*
  * Return a pointer to the indexed instruction in the codespace. The
  * ptr must be a value returned from codespace_allocate. The compiler
@@ -100,6 +103,9 @@ extern void codespace_dump(FILE*fd);
 
 /*
  * $Log: codes.h,v $
+ * Revision 1.13  2001/04/01 06:40:44  steve
+ *  Support empty statements for hanging labels.
+ *
  * Revision 1.12  2001/04/01 06:12:13  steve
  *  Add the bitwise %and instruction.
  *
diff --git a/vvp/compile.cc b/vvp/compile.cc
index 1d0b926b7..3e1b6c2ff 100644
--- a/vvp/compile.cc
+++ b/vvp/compile.cc
@@ -17,7 +17,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: compile.cc,v 1.24 2001/04/01 06:12:13 steve Exp $"
+#ident "$Id: compile.cc,v 1.25 2001/04/01 06:40:45 steve Exp $"
 #endif
 
 # include  "compile.h"
@@ -482,6 +482,17 @@ void compile_code(char*label, char*mnem, comp_operands_t opa)
       free(mnem);
 }
 
+void compile_codelabel(char*label)
+{
+      symbol_value_t val;
+      vvp_cpoint_t ptr = codespace_next();
+
+      val.num = ptr;
+      sym_set_value(sym_codespace, label, val);
+
+      free(label);
+}
+
 void compile_vpi_call(char*label, char*name, unsigned argc, vpiHandle*argv)
 {
       vvp_cpoint_t ptr = codespace_allocate();
@@ -696,6 +707,9 @@ void compile_dump(FILE*fd)
 
 /*
  * $Log: compile.cc,v $
+ * Revision 1.25  2001/04/01 06:40:45  steve
+ *  Support empty statements for hanging labels.
+ *
  * Revision 1.24  2001/04/01 06:12:13  steve
  *  Add the bitwise %and instruction.
  *
diff --git a/vvp/compile.h b/vvp/compile.h
index 319b4ff3d..36605f946 100644
--- a/vvp/compile.h
+++ b/vvp/compile.h
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: compile.h,v 1.12 2001/03/29 03:46:36 steve Exp $"
+#ident "$Id: compile.h,v 1.13 2001/04/01 06:40:45 steve Exp $"
 #endif
 
 # include  <stdio.h>
@@ -104,6 +104,7 @@ typedef struct comp_operands_s*comp_operands_t;
 extern void compile_code(char*label, char*mnem, comp_operands_t opa);
 extern void compile_vpi_call(char*label, char*name,
 			     unsigned argc, vpiHandle*argv);
+extern void compile_codelabel(char*label);
 
 /*
  * The parser uses these functions to compile .scope statements.
@@ -134,6 +135,9 @@ extern void compile_dump(FILE*fd);
 
 /*
  * $Log: compile.h,v $
+ * Revision 1.13  2001/04/01 06:40:45  steve
+ *  Support empty statements for hanging labels.
+ *
  * Revision 1.12  2001/03/29 03:46:36  steve
  *  Support named events as mode 2 functors.
  *
diff --git a/vvp/parse.y b/vvp/parse.y
index 524e403c9..d630496af 100644
--- a/vvp/parse.y
+++ b/vvp/parse.y
@@ -19,7 +19,7 @@
  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 #if !defined(WINNT)
-#ident "$Id: parse.y,v 1.14 2001/03/29 03:46:36 steve Exp $"
+#ident "$Id: parse.y,v 1.15 2001/04/01 06:40:45 steve Exp $"
 #endif
 
 # include  "parse_misc.h"
@@ -123,9 +123,10 @@ statement
      on the specific instruction. */
 
 	| label_opt T_INSTR operands_opt ';'
-		{ compile_code($1, $2, $3);
-		}
+		{ compile_code($1, $2, $3); }
 
+	| T_LABEL ';'
+		{ compile_codelabel($1); }
 
   /* %vpi_call statements are instructions that have unusual operand
      requirements so are handled by their own rules. */
@@ -307,6 +308,9 @@ int compile_design(const char*path)
 
 /*
  * $Log: parse.y,v $
+ * Revision 1.15  2001/04/01 06:40:45  steve
+ *  Support empty statements for hanging labels.
+ *
  * Revision 1.14  2001/03/29 03:46:36  steve
  *  Support named events as mode 2 functors.
  *