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diff --git a/gcc/testsuite/ada/acats/tests/cxa/cxa5a06.a b/gcc/testsuite/ada/acats/tests/cxa/cxa5a06.a
new file mode 100644
index 000000000..191a96d75
--- /dev/null
+++ b/gcc/testsuite/ada/acats/tests/cxa/cxa5a06.a
@@ -0,0 +1,334 @@
+-- CXA5A06.A
+--
+--                             Grant of Unlimited Rights
+--
+--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
+--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
+--     unlimited rights in the software and documentation contained herein.
+--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
+--     this public release, the Government intends to confer upon all 
+--     recipients unlimited rights  equal to those held by the Government.  
+--     These rights include rights to use, duplicate, release or disclose the 
+--     released technical data and computer software in whole or in part, in 
+--     any manner and for any purpose whatsoever, and to have or permit others 
+--     to do so.
+--
+--                                    DISCLAIMER
+--
+--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
+--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
+--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
+--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
+--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
+--     PARTICULAR PURPOSE OF SAID MATERIAL.
+--*
+--
+-- OBJECTIVE:
+--      Check that the functions Arccos and Arccosh provide correct 
+--      results.
+--
+-- TEST DESCRIPTION:
+--      This test examines both the version of Arccos and Arccosh 
+--      the instantiation of the Ada.Numerics.Generic_Elementary_Functions 
+--      with a type derived from type Float, as well as the preinstantiated 
+--      version of this package for type Float.
+--      Prescribed results, including instances prescribed to raise 
+--      exceptions, are examined in the test cases.  In addition, 
+--      certain evaluations are performed where the actual function result 
+--      is compared with the expected result (within an epsilon range of 
+--      accuracy).
+--
+-- TEST FILES:
+--      The following files comprise this test:
+--
+--         FXA5A00.A   (foundation code)
+--         CXA5A06.A
+--
+--
+-- CHANGE HISTORY:
+--      27 Mar 95   SAIC    Initial prerelease version.
+--      13 Jun 95   SAIC    Incorporated use of Dont_Optimize procedure, and
+--                          use of Result_Within_Range function overloaded for
+--                          FXA5A00.New_Float_Type.
+--      28 Feb 97   PWB.CTA Removed checks with explicit Cycle => 2.0*Pi
+--
+-- CHANGE NOTE:
+--      According to Ken Dritz, author of the Numerics Annex of the RM,
+--      one should never specify the cycle 2.0*Pi for the trigonometric
+--      functions.  In particular, if the machine number for the first
+--      argument is not an exact multiple of the machine number for the
+--      explicit cycle, then the specified exact results cannot be
+--      reasonably expected.  The affected checks in this test have been
+--      marked as comments, with the additional notation "pwb-math".
+--      Phil Brashear
+--!
+
+with Ada.Numerics.Elementary_Functions;
+with Ada.Numerics.Generic_Elementary_Functions;
+with FXA5A00;
+with Report;
+
+procedure CXA5A06 is
+begin
+
+   Report.Test ("CXA5A06", "Check that the functions Arccos and Arccosh " &
+                           "provide correct results");
+
+   Test_Block:
+   declare
+
+      use Ada.Numerics;
+      use FXA5A00;
+
+      package GEF is new Ada.Numerics.Generic_Elementary_Functions(New_Float);
+      package  EF renames Ada.Numerics.Elementary_Functions;
+
+      The_Result       : Float;
+      New_Float_Result : New_Float;
+
+      procedure Dont_Optimize_Float     is new Dont_Optimize(Float);
+      procedure Dont_Optimize_New_Float is new Dont_Optimize(New_Float);
+
+   begin
+
+      -- Testing of Arccos Function, both instantiated and pre-instantiated
+      -- version.
+
+      -- Check that Argument_Error is raised by the Arccos function when the
+      -- absolute value of the input parameter is greater than 1.0.
+
+      begin
+         New_Float_Result := GEF.Arccos(New_Float(FXA5A00.One_Plus_Delta));
+         Report.Failed("Argument_Error not raised by the Arccos function " &
+                       "when the input parameter is greater than 1.0");
+         Dont_Optimize_New_Float(New_Float_Result, 1);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccos "    &
+                          "function when the input parameter is greater " &
+                          "than 1.0");
+      end;
+
+      begin
+         The_Result := EF.Arccos(-FXA5A00.Large);
+         Report.Failed("Argument_Error not raised by the Arccos function " &
+                       "when the input parameter is a large negative value");
+         Dont_Optimize_Float(The_Result, 2);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccos " &
+                          "function when the input parameter is a "    &
+                          "large negative value");
+      end;
+
+
+      -- Check the prescribed results of the Arccos function.
+
+      if GEF.Arccos(X => 1.0) /= 0.0 or
+          EF.Arccos(1.0)      /= 0.0
+      then
+         Report.Failed("Incorrect result returned by the Arccos function " &
+                       "when provided a parameter value of 0.0");
+      end if;
+
+
+      -- Check the results of the Arccos function with various input 
+      -- parameters.
+ 
+      if not Result_Within_Range(GEF.Arccos(0.77),  0.692,  0.001) or
+         not Result_Within_Range( EF.Arccos(0.37),  1.19,   0.01)  or
+         not Result_Within_Range(GEF.Arccos(0.0),   Pi/2.0, 0.01)  or
+         not Result_Within_Range( EF.Arccos(-0.11), 1.68,   0.01)  or
+         not Result_Within_Range(GEF.Arccos(-0.67), 2.31,   0.01)  or
+         not Result_Within_Range( EF.Arccos(-0.94), 2.79,   0.01)  or
+         not Result_Within_Range(GEF.Arccos(-1.0),  Pi,     0.01) 
+      then
+         Report.Failed("Incorrect result returned from the Arccos " &
+                       "function when provided a variety of input " &
+                       "parameters");
+      end if;
+
+
+      -- Testing of the Arccos function with specified Cycle parameter.
+
+      -- Check that Argument_Error is raised by the Arccos function, with
+      -- specified Cycle parameter, when the absolute value of the input
+      -- parameter is greater than 1.0.
+
+      begin
+--pwb-math: Next line: Changed 2.0*Pi to 360.0
+         New_Float_Result := GEF.Arccos(New_Float(Large), Cycle => 360.0);
+         Report.Failed("Argument_Error not raised by the Arccos function " &
+                       "with specified Cycle parameter, when the input "   &
+                       "parameter is a large positive value");
+         Dont_Optimize_New_Float(New_Float_Result, 3);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccos "     &
+                          "function with specified Cycle parameter, when " &
+                          "the input parameter is a large positive value");
+      end;
+
+      begin
+--pwb-math: Next line: Changed 2.0*Pi to 360.0
+         The_Result := EF.Arccos(FXA5A00.Minus_One_Minus_Delta, 360.0);
+         Report.Failed("Argument_Error not raised by the Arccos function " &
+                       "with specified Cycle parameter, when the input "   &
+                       "parameter is less than -1.0");
+         Dont_Optimize_Float(The_Result, 4);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccos " &
+                          "function with specified Cycle parameter, "  &
+                          "when the input parameter is less than -1.0");
+      end;
+
+
+      -- Check that Argument_Error is raised by the Arccos function with
+      -- specified cycle when the value of the Cycle parameter is zero or
+      -- negative.
+
+      begin
+         New_Float_Result := GEF.Arccos(X => 1.0, Cycle => 0.0 );
+         Report.Failed("Argument_Error not raised by the Arccos function " &
+                       "with specified Cycle parameter, when the Cycle "   &
+                       "parameter is 0.0");
+         Dont_Optimize_New_Float(New_Float_Result, 5);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccos "     &
+                          "function with specified Cycle parameter, when " &
+                          "the Cycle parameter is 0.0");
+      end;
+
+      begin
+         The_Result := EF.Arccos(1.0, Cycle => -2.0*Pi);
+         Report.Failed("Argument_Error not raised by the Arccos function " &
+                       "with specified Cycle parameter, when the Cycle "   &
+                       "parameter is negative");
+         Dont_Optimize_Float(The_Result, 6);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccos "     &
+                          "function with specified Cycle parameter, when " &
+                          "the Cycle parameter is negative");
+      end;
+
+      
+      -- Check the prescribed result of the Arccos function with specified
+      -- Cycle parameter.
+
+--pwb-math: Next two lines: Changed 2.0*Pi to 360.0
+      if GEF.Arccos(X => 1.0, Cycle => 360.0) /= 0.0 or
+          EF.Arccos(1.0, 360.0)               /= 0.0
+      then 
+         Report.Failed("Incorrect result from the Arccos function with " &
+                       "specified Cycle parameter, when the input "      &
+                       "parameter value is 1.0");
+      end if;
+
+
+      -- Check the results of the Arccos function, with specified Cycle
+      -- parameter, with various input parameters.
+ 
+      if --pwb-math not Result_Within_Range(GEF.Arccos( 0.04, 2.0*Pi), 1.53, 0.01) or
+--pwb-math         not Result_Within_Range( EF.Arccos( 0.14, 2.0*Pi), 1.43, 0.01) or
+--pwb-math         not Result_Within_Range(GEF.Arccos( 0.57, 2.0*Pi), 0.96, 0.01) or
+--pwb-math         not Result_Within_Range( EF.Arccos( 0.99, 2.0*Pi), 0.14, 0.01) or
+         not Result_Within_Range(GEF.Arccos(-1.0, 360.0), 180.0,  0.1)  or
+         not Result_Within_Range(GEF.Arccos(-1.0, 100.0),  50.0,  0.1)  or
+         not Result_Within_Range(GEF.Arccos( 0.0, 360.0),  90.0,  0.1)  or
+         not Result_Within_Range(GEF.Arccos( 0.0, 100.0),  25.0,  0.1)
+      then
+         Report.Failed("Incorrect result returned from the Arccos " &
+                       "function with specified Cycle parameter, "  &
+                       "when provided a variety of input parameters");
+      end if;
+
+
+
+      -- Testing of Arccosh Function, both instantiated and pre-instantiated
+      -- version.
+
+      -- Check that Argument_Error is raised by the Arccosh function when
+      -- the value of the parameter X is less than 1.0.
+
+      begin 
+         New_Float_Result := GEF.Arccosh(New_Float(FXA5A00.One_Minus_Delta));
+         Report.Failed("Argument_Error not raised by the Arccosh function " &
+                       "when the parameter value is less than 1.0");
+         Dont_Optimize_New_Float(New_Float_Result, 7);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccosh " &
+                          "function when given a parameter value less " &
+                          "than 1.0");
+      end;
+                    
+      begin 
+         The_Result := EF.Arccosh(0.0);
+         Report.Failed("Argument_Error not raised by the Arccosh function " &
+                       "when the parameter value is 0.0");
+         Dont_Optimize_Float(The_Result, 8);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccosh " &
+                          "function when given a parameter value of 0.0");
+      end;
+                    
+      begin 
+         New_Float_Result := GEF.Arccosh(New_Float(-FXA5A00.Large));
+         Report.Failed("Argument_Error not raised by the Arccosh function " &
+                       "when the large negative parameter value");
+         Dont_Optimize_New_Float(New_Float_Result, 9);
+      exception
+         when Argument_Error => null;  -- OK, expected exception.
+         when others         =>
+            Report.Failed("Unexpected exception raised by the Arccosh "     &
+                          "function when given a large negative parameter " & 
+                          "value");
+      end;
+                    
+
+      -- Check the prescribed results of the Arccosh function.
+
+      if GEF.Arccosh(X => 1.0) /= 0.0 or
+          EF.Arccosh(1.0)      /= 0.0
+      then
+         Report.Failed("Incorrect result returned by the Arccosh " &
+                       "function when provided a parameter value of 0.0");
+      end if;
+
+
+      -- Check the results of the Arccosh function with various input 
+      -- parameters.
+ 
+      if not Result_Within_Range(GEF.Arccosh(1.03), 0.244, 0.001) or
+         not Result_Within_Range( EF.Arccosh(1.28), 0.732, 0.001) or
+         not Result_Within_Range(GEF.Arccosh(1.50), 0.962, 0.001) or
+         not Result_Within_Range( EF.Arccosh(1.77), 1.17,  0.01)  or
+         not Result_Within_Range(GEF.Arccosh(2.00), 1.32,  0.01)  or
+         not Result_Within_Range( EF.Arccosh(4.30), 2.14,  0.01)  or
+         not Result_Within_Range(GEF.Arccosh(6.90), 2.62,  0.01) 
+      then
+         Report.Failed("Incorrect result returned from the Arccosh " &
+                       "function when provided a variety of input "  &
+                       "parameters");
+      end if;
+
+
+   exception
+      when others => Report.Failed ("Exception raised in Test_Block");
+   end Test_Block;
+
+   Report.Result;
+
+end CXA5A06;