From f7526c6c4b636b23b41555f18848fb9a5aefd512 Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Fri, 5 Nov 1999 19:36:36 +0000
Subject: [PATCH]  parse drive strengths.

---
 README.txt |  2 ++
 parse.y    | 23 ++++++++++++++++++++---
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/README.txt b/README.txt
index ae2ec6242..2d288e21f 100644
--- a/README.txt
+++ b/README.txt
@@ -327,6 +327,8 @@ current state of support for Verilog.
             reg [7:0] del;
 	    always #(reg) $display($time,,"del = %d", del); // sorry
 
+  - drive strengths are parsed, bug ignored.
+
 Specify blocks are parsed but ignored in general.
 
 
diff --git a/parse.y b/parse.y
index 85121a49f..c10ac832b 100644
--- a/parse.y
+++ b/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 1.74 1999/10/15 05:03:33 steve Exp $"
+#ident "$Id: parse.y,v 1.75 1999/11/05 19:36:36 steve Exp $"
 #endif
 
 # include  "parse_misc.h"
@@ -336,6 +336,23 @@ description
 		}
 	;
 
+drive_strength
+	: '(' dr_strength0 ',' dr_strength1 ')'
+	| '(' dr_strength1 ',' dr_strength0 ')'
+	| '(' dr_strength0 ',' K_highz1 ')'
+	| '(' dr_strength1 ',' K_highz0 ')'
+	| '(' K_highz1 ',' dr_strength0 ')'
+	| '(' K_highz0 ',' dr_strength1 ')'
+	;
+
+drive_strength_opt
+	: drive_strength
+	|
+	;
+
+dr_strength0 : K_supply0 | K_strong0 | K_pull0 | K_weak0 ;
+dr_strength1 : K_supply1 | K_strong1 | K_pull1 | K_weak1 ;
+
 event_control
 	: '@' IDENTIFIER
 		{ yyerror(@1, "sorry: event control not supported.");
@@ -1061,8 +1078,8 @@ module_item
 		{ pform_make_modgates($1, $2, $3);
 		  delete $1;
 		}
-	| K_assign delay_opt assign_list ';'
-		{ pform_make_pgassign_list($3, $2, @1.text, @1.first_line); }
+	| K_assign drive_strength_opt delay_opt assign_list ';'
+		{ pform_make_pgassign_list($4, $3, @1.text, @1.first_line); }
 	| K_assign error '=' expression ';'
 	| K_always statement
 		{ PProcess*tmp = pform_make_behavior(PProcess::PR_ALWAYS, $2);