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diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/do_arith_op.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/do_arith_op.vhd
new file mode 100644
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+++ b/testsuite/vests/vhdl-ams/ashenden/compliant/subprograms/do_arith_op.vhd
@@ -0,0 +1,85 @@
+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- 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. 
+
+-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+entity do_arith_op is
+end entity do_arith_op;
+
+
+architecture test of do_arith_op is
+
+  type func_code is (add, subtract);
+
+  signal op1 : integer := 10;
+  signal op2 : integer := 3;
+  signal dest : integer := 0;
+  signal func : func_code := add;
+
+  signal Z_flag : boolean := false;
+
+  constant Tpd : delay_length := 3 ns;
+
+begin
+
+  stimulus : process is
+
+    -- code from book
+
+    procedure do_arith_op ( op : in func_code ) is
+      variable result : integer;
+    begin
+      case op is
+        when add =>
+          result := op1 + op2;
+        when subtract =>
+          result := op1 - op2;
+      end case;
+      dest  <=  result after Tpd;
+      Z_flag  <=  result = 0 after Tpd;
+    end procedure do_arith_op;
+
+    -- end code from book
+
+  begin
+    wait for 10 ns;
+
+    -- code from book (in text)
+
+    do_arith_op ( add );
+
+    -- end code from book
+
+    wait for 10 ns;
+
+    -- code from book (in text)
+
+    do_arith_op ( func );
+
+    -- end code from book
+
+    wait for 10 ns;
+    do_arith_op ( subtract );
+    wait for 10 ns;
+    op2 <= 10;
+    wait for 10 ns;
+    do_arith_op ( subtract );
+
+    wait;
+  end process stimulus;
+
+end architecture test;