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-- CXF2002.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 multiplying operators for a decimal fixed point type

--      return values that are integral multiples of the small of the type.

--      Check the case where the operand and result types are the same.

--

--      Check that if the mathematical result is between multiples of the

--      small of the result type, the result is truncated toward zero.

--      Check that if the attribute 'Round is applied to the mathematical

--      result, however, the result is rounded to the nearest multiple of

--      the small (away from zero if the result is midway between two

--      multiples of the small).

--

-- TEST DESCRIPTION:

--      Two decimal fixed point types are declared, one with a Machine_Radix

--      value of 2, and one with a value of 10. For each type, checks are

--      performed on the following operations, where the operand and result

--      types are the same:

--

--         - Multiplication.

--         - Multiplication, where the attribute 'Round is applied to the

--           result.

--         - Division.

--         - Division, where the attribute 'Round is applied to the result.

--

--      Each operation is performed within a loop, where one operand is

--      always the same variable. After the loop completes, the cumulative

--      total contained in this variable is compared with the expected

--      result.

--

-- APPLICABILITY CRITERIA:

--      This test is only applicable for a compiler attempting validation

--      for the Information Systems Annex.

--

--

-- CHANGE HISTORY:

--      27 Mar 96   SAIC    Prerelease version for ACVC 2.1.

--

--!

generic

   type Decimal_Fixed is delta <> digits <>;

package CXF2002_0 is

   procedure Multiply_And_Truncate (Balance : in out Decimal_Fixed;

                                    Factor  : in     Decimal_Fixed);

   procedure Divide_And_Truncate   (Balance : in out Decimal_Fixed;

                                    Divisor : in     Decimal_Fixed);

   procedure Multiply_And_Round    (Balance : in out Decimal_Fixed;

                                    Factor  : in     Decimal_Fixed);

   procedure Divide_And_Round      (Balance : in out Decimal_Fixed;

                                    Divisor : in     Decimal_Fixed);

end CXF2002_0;

     --==================================================================--

package body CXF2002_0 is

   procedure Multiply_And_Truncate (Balance : in out Decimal_Fixed;

                                    Factor  : in     Decimal_Fixed) is

      Interest : Decimal_Fixed;

   begin

      Interest := Factor * Balance;      -- Fixed-fixed multiplication.

      Balance  := Balance + Interest;

   end Multiply_And_Truncate;

   procedure Divide_And_Truncate (Balance : in out Decimal_Fixed;

                                  Divisor : in     Decimal_Fixed) is

      Interest : Decimal_Fixed;

   begin

      Interest := Balance / Divisor;     -- Fixed-fixed division.

      Balance  := Balance + Interest;

   end Divide_And_Truncate;

   procedure Multiply_And_Round (Balance : in out Decimal_Fixed;

                                 Factor  : in     Decimal_Fixed) is

      Interest : Decimal_Fixed;

   begin

                                         -- Fixed-fixed multiplication.

      Interest := Decimal_Fixed'Round ( Factor * Balance );

      Balance  := Balance + Interest;

   end Multiply_And_Round;

   procedure Divide_And_Round (Balance : in out Decimal_Fixed;

                               Divisor : in     Decimal_Fixed) is

      Interest : Decimal_Fixed;

   begin

                                         -- Fixed-fixed division.

      Interest := Decimal_Fixed'Round ( Balance / Divisor );

      Balance  := Balance + Interest;

   end Divide_And_Round;

end CXF2002_0;

     --==================================================================--

package CXF2002_1 is

   type Money_Radix2 is delta 0.01 digits 11;  -- range -999,999,999.99 ..

   for Money_Radix2'Machine_Radix use 2;       --       +999,999,999.99

   type Money_Radix10 is delta 0.01 digits 11; -- range -999,999,999.99 ..

   for Money_Radix10'Machine_Radix use 10;     --       +999,999,999.99

end CXF2002_1;

     --==================================================================--

with CXF2002_0;

with CXF2002_1;

with Report;

procedure CXF2002 is

   Loop_Count : constant := 300;

   type Loop_Range is range 1 .. Loop_Count;

begin

   Report.Test ("CXF2002", "Check decimal multiplication and division, and " &

                           "'Round, where the operand and result types are " &

                           "the same");

               ---=---=---=---=---=---=---=---=---=---=---

   RADIX_2_SUBTESTS:

   declare

      package Radix_2 is new CXF2002_0 (CXF2002_1.Money_Radix2);

      use type CXF2002_1.Money_Radix2;

   begin

      RADIX_2_MULTIPLICATION:

      declare

         Rate           : constant CXF2002_1.Money_Radix2 := 0.12;

         Period         : constant Integer                := 12;

         Factor         :          CXF2002_1.Money_Radix2 := Rate / Period;

         Initial        : constant CXF2002_1.Money_Radix2 :=   100_000.00;

         Trunc_Expected : constant CXF2002_1.Money_Radix2 := 1_978_837.50;

         Round_Expected : constant CXF2002_1.Money_Radix2 := 1_978_846.75;

         Balance        : CXF2002_1.Money_Radix2;

      begin

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_2.Multiply_And_Truncate (Balance, Factor);

         end loop;

         if Balance /= Trunc_Expected then

            Report.Failed ("Wrong result: Radix 2 multiply and truncate");

         end if;

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_2.Multiply_And_Round (Balance, Factor);

         end loop;

         if Balance /= Round_Expected then

            Report.Failed ("Wrong result: Radix 2 multiply and round");

         end if;

                       ---=---=---=---=---=---=---

      end RADIX_2_MULTIPLICATION;

      RADIX_2_DIVISION:

      declare

         Rate           : constant CXF2002_1.Money_Radix2 := 0.25;

         Period         : constant Integer                := 12;

         Factor         :          CXF2002_1.Money_Radix2 := Rate / Period;

         Divisor        : constant CXF2002_1.Money_Radix2 := 1.0 / Factor;

         Initial        : constant CXF2002_1.Money_Radix2 :=     5_500.36;

         Trunc_Expected : constant CXF2002_1.Money_Radix2 := 2_091_332.87;

         Round_Expected : constant CXF2002_1.Money_Radix2 := 2_091_436.88;

         Balance        : CXF2002_1.Money_Radix2;

      begin

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_2.Divide_And_Truncate (Balance, Divisor);

         end loop;

         if Balance /= Trunc_Expected then

            Report.Failed ("Wrong result: Radix 2 divide and truncate");

         end if;

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_2.Divide_And_Round (Balance, Divisor);

         end loop;

         if Balance /= Round_Expected then

            Report.Failed ("Wrong result: Radix 2 divide and round");

         end if;

                       ---=---=---=---=---=---=---

      end RADIX_2_DIVISION;

   end RADIX_2_SUBTESTS;

               ---=---=---=---=---=---=---=---=---=---=---

   RADIX_10_SUBTESTS:

   declare

      package Radix_10 is new CXF2002_0 (CXF2002_1.Money_Radix10);

      use type CXF2002_1.Money_Radix10;

   begin

      RADIX_10_MULTIPLICATION:

      declare

         Rate           : constant CXF2002_1.Money_Radix10 := 0.37;

         Period         : constant Integer                 := 12;

         Factor         :          CXF2002_1.Money_Radix10 := Rate / Period;

         Initial        : constant CXF2002_1.Money_Radix10 :=       459.33;

         Trunc_Expected : constant CXF2002_1.Money_Radix10 := 3_259_305.54;

         Round_Expected : constant CXF2002_1.Money_Radix10 := 3_260_544.11;

         Balance        : CXF2002_1.Money_Radix10;

      begin

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_10.Multiply_And_Truncate (Balance, Factor);

         end loop;

         if Balance /= Trunc_Expected then

            Report.Failed ("Wrong result: Radix 10 multiply and truncate");

         end if;

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_10.Multiply_And_Round (Balance, Factor);

         end loop;

         if Balance /= Round_Expected then

            Report.Failed ("Wrong result: Radix 10 multiply and round");

         end if;

                       ---=---=---=---=---=---=---

      end RADIX_10_MULTIPLICATION;

      RADIX_10_DIVISION:

      declare

         Rate           : constant CXF2002_1.Money_Radix10 := 0.15;

         Period         : constant Integer                 := 12;

         Factor         :          CXF2002_1.Money_Radix10 := Rate / Period;

         Divisor        : constant CXF2002_1.Money_Radix10 := 1.0 / Factor;

         Initial        : constant CXF2002_1.Money_Radix10 :=    29_842.08;

         Trunc_Expected : constant CXF2002_1.Money_Radix10 :=   590_519.47;

         Round_Expected : constant CXF2002_1.Money_Radix10 :=   590_528.98;

         Balance        : CXF2002_1.Money_Radix10;

      begin

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_10.Divide_And_Truncate (Balance, Divisor);

         end loop;

         if Balance /= Trunc_Expected then

            Report.Failed ("Wrong result: Radix 10 divide and truncate");

         end if;

                       ---=---=---=---=---=---=---

         Balance := Initial;

         for I in Loop_Range loop

            Radix_10.Divide_And_Round (Balance, Divisor);

         end loop;

         if Balance /= Round_Expected then

            Report.Failed ("Wrong result: Radix 10 divide and round");

         end if;

                       ---=---=---=---=---=---=---

      end RADIX_10_DIVISION;

   end RADIX_10_SUBTESTS;

               ---=---=---=---=---=---=---=---=---=---=---

   Report.Result;

end CXF2002;