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-- CXB2001.A

--

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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained

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--     any manner and for any purpose whatsoever, and to have or permit others

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--

--                                    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 subprograms Shift_Left, Shift_Right,

--      Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right are available

--      and produce correct results for values of signed and modular

--      integer types of 8 bits.

--

-- TEST DESCRIPTION:

--      This test uses the shift and rotate functions of package Interfaces

--      with a modular type representative of 8 bits.  The functions

--      are used as the right hand of assignment statements, as part of

--      conditional statements, and as arguments in other function calls.

--

--      A check is performed in the test to determine whether the bit

--      ordering method used by the machine/implementation is high-order

--      first ("Big Endian") or low-order first ("Little Endian").  The

--      specific subtests use this information to evaluate the results of

--      each of the functions under test.

--

--      Note: In the string associated with each Report.Failed statement, the

--            acronym BE refers to Big Endian, LE refers to Little Endian.

--

-- APPLICABILITY CRITERIA:

--      This test is applicable to all implementations that support signed

--      and modular integer types of 8 bits.

--

--

-- CHANGE HISTORY:

--      21 Aug 95   SAIC    Initial prerelease version.

--      07 May 96   SAIC    Incorporated reviewer comments for ACVC 2.1.

--

--!

with Report;

with Interfaces;

with Ada.Exceptions;

procedure CXB2001 is

begin

   Report.Test ("CXB2001",

                "Check that subprograms Shift_Left, Shift_Right, "       &

                "Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right " &

                "produce correct results for values of signed and "      &

                "modular integer types of 8 bits");

   Test_Block:

   declare

      use Ada.Exceptions;

      use Interfaces;

      TC_Amount             : Natural     := Natural'First;

      Big_Endian            : Boolean     := False;

      -- Range of type Unsigned_8 is 0..255 (0..Modulus-1).

      TC_Val_Unsigned_8,

      TC_Result_Unsigned_8  : Unsigned_8  := Unsigned_8'First;

   begin

      -- Determine whether the machine uses high-order first or low-order

      -- first bit ordering.

      -- On a high-order first machine, bit zero of a storage element is

      -- the most significant bit (interpreting the sequence of bits that

      -- represent a component as an unsigned integer value).

      -- On a low-order first machine, bit zero is the least significant.

      -- In this check, a right shift of one place on a Big Endian machine

      -- will yield a result of one, while on a Little Endian machine the

      -- result would be four.

      TC_Val_Unsigned_8 := 2;

      Big_Endian := (Shift_Right(TC_Val_Unsigned_8, 1) = 1);

      -- Note: The shifting and rotating subprograms operate on a bit-by-bit

      --       basis, using the binary representation of the value of the

      --       operands to yield a binary representation for the result.

      -- Function Shift_Left.

      if Big_Endian then   -- High-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := Unsigned_8'Last;  -- 255.

         TC_Result_Unsigned_8 := Shift_Left(Value  => TC_Val_Unsigned_8,

                                            Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 254 then

            Report.Failed("Incorrect result from BE Shift_Left - 1");

         end if;

         if Shift_Left(TC_Val_Unsigned_8, 2) /= 252  or

            Shift_Left(TC_Val_Unsigned_8, 3) /= 248  or

            Shift_Left(TC_Val_Unsigned_8, 5) /= 224  or

            Shift_Left(TC_Val_Unsigned_8, 8) /=   0  or

            Shift_Left(TC_Val_Unsigned_8, 9) /=   0  or

            Shift_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from BE Shift_Left - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Shift_Left(TC_Val_Unsigned_8, 1)           /=  2 or

            Shift_Left(TC_Val_Unsigned_8, Amount => 3) /=  8

         then

            Report.Failed("Incorrect result from BE Shift_Left - 3");

         end if;

         TC_Val_Unsigned_8 := 7;

         if Shift_Left(TC_Val_Unsigned_8, Amount => 4)      /= 112  or

            Shift_Left(Shift_Left(TC_Val_Unsigned_8, 7), 1) /=   0

         then

            Report.Failed("Incorrect result from BE Shift_Left - 4");

         end if;

      else  -- Low-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := Unsigned_8'Last;  -- 255.

         TC_Result_Unsigned_8 := Shift_Left(TC_Val_Unsigned_8, TC_Amount);

         if TC_Result_Unsigned_8 /= 127 then

            Report.Failed("Incorrect result from LE Shift_Left - 1");

         end if;

         if Shift_Left(TC_Val_Unsigned_8, 2) /=  63  or

            Shift_Left(TC_Val_Unsigned_8, 3) /=  31  or

            Shift_Left(TC_Val_Unsigned_8, 5) /=   7  or

            Shift_Left(TC_Val_Unsigned_8, 8) /=   0  or

            Shift_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from LE Shift_Left - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Shift_Left(TC_Val_Unsigned_8, 1) /= 0 or

            Shift_Left(TC_Val_Unsigned_8, 7) /= 0

         then

            Report.Failed("Incorrect result from LE Shift_Left - 3");

         end if;

         TC_Val_Unsigned_8 := 129;

         if Shift_Left(TC_Val_Unsigned_8, 4)                /= 8  or

            Shift_Left(Shift_Left(TC_Val_Unsigned_8, 7), 1) /= 0

         then

            Report.Failed("Incorrect result from LE Shift_Left - 4");

         end if;

      end if;

      -- Function Shift_Right.

      if Big_Endian then   -- High-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := Unsigned_8'Last;  -- 255.

         TC_Result_Unsigned_8 := Shift_Right(TC_Val_Unsigned_8, TC_Amount);

         if TC_Result_Unsigned_8 /= 127 then

            Report.Failed("Incorrect result from BE Shift_Right - 1");

         end if;

         if Shift_Right(TC_Val_Unsigned_8, 2) /=  63  or

            Shift_Right(TC_Val_Unsigned_8, 3) /=  31  or

            Shift_Right(TC_Val_Unsigned_8, 5) /=   7  or

            Shift_Right(TC_Val_Unsigned_8, 8) /=   0  or

            Shift_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from BE Shift_Right - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Shift_Right(TC_Val_Unsigned_8, 1) /= 0 or

            Shift_Right(TC_Val_Unsigned_8, 7) /= 0

         then

            Report.Failed("Incorrect result from BE Shift_Right - 3");

         end if;

         TC_Val_Unsigned_8 := 129;

         if Shift_Right(TC_Val_Unsigned_8, 4)                 /= 8  or

            Shift_Right(Shift_Right(TC_Val_Unsigned_8, 7), 1) /= 0

         then

            Report.Failed("Incorrect result from BE Shift_Right - 4");

         end if;

      else  -- Low-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := Unsigned_8'Last;  -- 255.

         TC_Result_Unsigned_8 := Shift_Right(Value  => TC_Val_Unsigned_8,

                                             Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 254 then

            Report.Failed("Incorrect result from LE Shift_Right - 1");

         end if;

         if Shift_Right(TC_Val_Unsigned_8, 2) /= 252  or

            Shift_Right(TC_Val_Unsigned_8, 3) /= 248  or

            Shift_Right(TC_Val_Unsigned_8, 5) /= 224  or

            Shift_Right(TC_Val_Unsigned_8, 8) /=   0  or

            Shift_Right(TC_Val_Unsigned_8, 9) /=   0  or

            Shift_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from LE Shift_Right - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Shift_Right(TC_Val_Unsigned_8, 1)           /=  2 or

            Shift_Right(TC_Val_Unsigned_8, Amount => 3) /=  8

         then

            Report.Failed("Incorrect result from LE Shift_Right - 3");

         end if;

         TC_Val_Unsigned_8 := 7;

         if Shift_Right(TC_Val_Unsigned_8, Amount => 4)       /= 112  or

            Shift_Right(Shift_Right(TC_Val_Unsigned_8, 7), 1) /=   0

         then

            Report.Failed("Incorrect result from LE Shift_Right - 4");

         end if;

      end if;

      -- Tests of Shift_Left and Shift_Right in combination.

      if Big_Endian then   -- High-order first bit ordering.

         TC_Val_Unsigned_8  := 32;

         if Shift_Left(Shift_Right(TC_Val_Unsigned_8, 2), 2) /=

            TC_Val_Unsigned_8                                       or

            Shift_Left(Shift_Right(TC_Val_Unsigned_8, 1), 3) /= 128 or

            Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 6) /=   2 or

            Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 8) /=   0

         then

            Report.Failed("Incorrect result from BE Shift_Left - " &

                          "Shift_Right functions used in combination");

         end if;

      else  -- Low-order first bit ordering.

         TC_Val_Unsigned_8  := 32;

         if Shift_Left(Shift_Right(TC_Val_Unsigned_8, 2), 2) /=

            TC_Val_Unsigned_8                                       or

            Shift_Left(Shift_Right(TC_Val_Unsigned_8, 1), 3) /=   8 or

            Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 3) /=  64 or

            Shift_Right(Shift_Left(TC_Val_Unsigned_8, 2), 4) /= 128

         then

            Report.Failed("Incorrect result from LE Shift_Left - " &

                          "Shift_Right functions used in combination");

         end if;

      end if;

      -- Function Shift_Right_Arithmetic.

      if Big_Endian then   -- High-order first bit ordering.

         -- Case where the parameter Value is less than

         -- one half of the modulus.  Zero bits will be shifted in.

         -- Modulus of type Unsigned_8 is 256; half of the modulus is 128.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 127;  -- Less than one half of modulus.

         TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,

                                                        TC_Amount);

         if TC_Result_Unsigned_8 /= 63 then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 1");

         end if;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /=  31  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /=  15  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /=   3  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 8) /=   0  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, Amount => 1) /= 0 or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3)           /= 0

         then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 3");

         end if;

         -- Case where the parameter Value is greater than or equal to

         -- one half of the modulus.  One bits will be shifted in.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 128;  -- One half of modulus.

         TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,

                                                        Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 192 then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 4");

         end if;

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 129;  -- Greater than one half of modulus.

         TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,

                                                        Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 192 then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 5");

         end if;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /= 224  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 240  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /= 252  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 7) /= Unsigned_8'Last or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 6");

         end if;

         TC_Val_Unsigned_8 := Unsigned_8'Last;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 1) /=

            Unsigned_8'Last

         then

            Report.Failed

              ("Incorrect result from BE Shift_Right_Arithmetic - 7");

         end if;

      else  -- Low-order first bit ordering

         -- Case where the parameter Value is less than

         -- one half of the modulus.  Zero bits will be shifted in.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 127;  -- Less than one half of modulus.

         TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,

                                                        TC_Amount);

         if TC_Result_Unsigned_8 /= 254 then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 1");

         end if;

         TC_Val_Unsigned_8 := 2;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /=   8  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /=  16  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /=  64  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 8) /=   0  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 2");

         end if;

         TC_Val_Unsigned_8 := 64;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, Amount => 1) /= 128 or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3)           /=   0

         then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 3");

         end if;

         -- Case where the parameter Value is greater than or equal to

         -- one half of the modulus.  One bits will be shifted in.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 128;  -- One half of modulus.

         TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,

                                                        Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 3 then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 4");

         end if;

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 129;  -- Greater than one half of modulus.

         TC_Result_Unsigned_8 := Shift_Right_Arithmetic(TC_Val_Unsigned_8,

                                                        Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 3 then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 5");

         end if;

         TC_Val_Unsigned_8    := 135;  -- Greater than one half of modulus.

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 2) /= 31  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 3) /= 63  or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 5) /= Unsigned_8'Last or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 7) /= Unsigned_8'Last or

            Shift_Right_Arithmetic(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 6");

         end if;

         TC_Val_Unsigned_8 := Unsigned_8'Last;

         if Shift_Right_Arithmetic(TC_Val_Unsigned_8, 1) /=

            Unsigned_8'Last

         then

            Report.Failed

              ("Incorrect result from LE Shift_Right_Arithmetic - 7");

         end if;

      end if;

      -- Function Rotate_Left.

      if Big_Endian then  -- High-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 129;

         TC_Result_Unsigned_8 := Rotate_Left(Value  => TC_Val_Unsigned_8,

                                             Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 3 then

            Report.Failed("Incorrect result from BE Rotate_Left - 1");

         end if;

         if Rotate_Left(TC_Val_Unsigned_8, 2) /=   6  or

            Rotate_Left(TC_Val_Unsigned_8, 3) /=  12  or

            Rotate_Left(TC_Val_Unsigned_8, 5) /=  48  or

            Rotate_Left(TC_Val_Unsigned_8, 8) /= 129  or

            Rotate_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from BE Rotate_Left - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Rotate_Left(Value => TC_Val_Unsigned_8, Amount => 1) /= 2 or

            Rotate_Left(TC_Val_Unsigned_8, Amount => 3)          /= 8

         then

            Report.Failed("Incorrect result from BE Rotate_Left - 3");

         end if;

         TC_Val_Unsigned_8 := 82;

         if Rotate_Left(TC_Val_Unsigned_8, Amount => 4)       /=  37  or

            Rotate_Left(Rotate_Left(TC_Val_Unsigned_8, 7), 1) /=  82

         then

            Report.Failed("Incorrect result from BE Rotate_Left - 4");

         end if;

      else   -- Low-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 1;

         TC_Result_Unsigned_8 := Rotate_Left(TC_Val_Unsigned_8, TC_Amount);

         if TC_Result_Unsigned_8 /= 128 then

            Report.Failed("Incorrect result from LE Rotate_Left - 1");

         end if;

         TC_Val_Unsigned_8    := 15;

         if Rotate_Left(TC_Val_Unsigned_8, 2) /=  195  or

            Rotate_Left(TC_Val_Unsigned_8, 3) /=  225  or

            Rotate_Left(TC_Val_Unsigned_8, 5) /=  120  or

            Rotate_Left(TC_Val_Unsigned_8, 8) /= TC_Val_Unsigned_8 or

            Rotate_Left(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from LE Rotate_Left - 2");

         end if;

         TC_Val_Unsigned_8 := Unsigned_8'Last;

         if Rotate_Left(TC_Val_Unsigned_8, 1) /= Unsigned_8'Last then

            Report.Failed("Incorrect result from LE Rotate_Left - 3");

         end if;

         TC_Val_Unsigned_8 := 12;

         if Rotate_Left(TC_Val_Unsigned_8, 1) /=   6 or

            Rotate_Left(TC_Val_Unsigned_8, 3) /= 129

         then

            Report.Failed("Incorrect result from LE Rotate_Left - 4");

         end if;

         TC_Val_Unsigned_8 := 129;

         if Rotate_Left(TC_Val_Unsigned_8, 4)                 /=  24  or

            Rotate_Left(Rotate_Left(TC_Val_Unsigned_8, 7), 1) /= 129

         then

            Report.Failed("Incorrect result from LE Rotate_Left - 5");

         end if;

      end if;

      -- Function Rotate_Right.

      if Big_Endian then  -- High-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 1;

         TC_Result_Unsigned_8 := Rotate_Right(TC_Val_Unsigned_8, TC_Amount);

         if TC_Result_Unsigned_8 /= 128 then

            Report.Failed("Incorrect result from BE Rotate_Right - 1");

         end if;

         TC_Val_Unsigned_8    := 15;

         if Rotate_Right(TC_Val_Unsigned_8, 2) /=  195  or

            Rotate_Right(TC_Val_Unsigned_8, 3) /=  225  or

            Rotate_Right(TC_Val_Unsigned_8, 5) /=  120  or

            Rotate_Right(TC_Val_Unsigned_8, 8) /= TC_Val_Unsigned_8 or

            Rotate_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from BE Rotate_Right - 2");

         end if;

         TC_Val_Unsigned_8 := Unsigned_8'Last;

         if Rotate_Right(TC_Val_Unsigned_8, 1) /= Unsigned_8'Last then

            Report.Failed("Incorrect result from BE Rotate_Right - 3");

         end if;

         TC_Val_Unsigned_8 := 12;

         if Rotate_Right(TC_Val_Unsigned_8, 1) /=   6 or

            Rotate_Right(TC_Val_Unsigned_8, 3) /= 129

         then

            Report.Failed("Incorrect result from BE Rotate_Right - 4");

         end if;

         TC_Val_Unsigned_8 := 129;

         if Rotate_Right(TC_Val_Unsigned_8, 4)                  /=  24  or

            Rotate_Right(Rotate_Right(TC_Val_Unsigned_8, 7), 1) /= 129

         then

            Report.Failed("Incorrect result from BE Rotate_Right - 5");

         end if;

      else  -- Low-order first bit ordering.

         TC_Amount            := 1;

         TC_Val_Unsigned_8    := 129;

         TC_Result_Unsigned_8 := Rotate_Right(Value  => TC_Val_Unsigned_8,

                                              Amount => TC_Amount);

         if TC_Result_Unsigned_8 /= 3 then

            Report.Failed("Incorrect result from LE Rotate_Right - 1");

         end if;

         if Rotate_Right(TC_Val_Unsigned_8, 2) /=   6  or

            Rotate_Right(TC_Val_Unsigned_8, 3) /=  12  or

            Rotate_Right(TC_Val_Unsigned_8, 5) /=  48  or

            Rotate_Right(TC_Val_Unsigned_8, 8) /= 129  or

            Rotate_Right(TC_Val_Unsigned_8, 0) /= TC_Val_Unsigned_8

         then

            Report.Failed("Incorrect result from LE Rotate_Right - 2");

         end if;

         TC_Val_Unsigned_8 := 1;

         if Rotate_Right(Value => TC_Val_Unsigned_8, Amount => 1) /= 2 or

            Rotate_Right(TC_Val_Unsigned_8, Amount => 3)          /= 8

         then

            Report.Failed("Incorrect result from LE Rotate_Right - 3");

         end if;

         TC_Val_Unsigned_8 := 82;

         if Rotate_Right(TC_Val_Unsigned_8, Amount => 4)        /=  37  or

            Rotate_Right(Rotate_Right(TC_Val_Unsigned_8, 7), 1) /=  82

         then

            Report.Failed("Incorrect result from LE Rotate_Right - 4");

         end if;

      end if;

      -- Tests of Rotate_Left and Rotate_Right in combination.

      if Big_Endian then  -- High-order first bit ordering.

         TC_Val_Unsigned_8  := 17;

         if Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 2), 2) /=

            TC_Val_Unsigned_8                                        or

            Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 1), 3) /= 68 or

            Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 3), 7) /= 17 or

            Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 2), 8) /= 68

         then

            Report.Failed("Incorrect result from BE Rotate_Left - " &

                          "Rotate_Right functions used in combination");

         end if;

      else  -- Low-order first bit ordering.

         TC_Val_Unsigned_8 := 4;

         if Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 2), 2) /=

            TC_Val_Unsigned_8                                        or

            Rotate_Left(Rotate_Right(TC_Val_Unsigned_8, 1), 3) /=  1 or

            Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 3), 7) /= 64 or

            Rotate_Right(Rotate_Left(TC_Val_Unsigned_8, 2), 8) /=  1

         then

            Report.Failed("Incorrect result from LE Rotate_Left - " &

                          "Rotate_Right functions used in combination");

         end if;

      end if;

   exception

      when The_Error : others =>

         Report.Failed ("The following exception was raised in the " &

                        "Test_Block: " & Exception_Name(The_Error));

   end Test_Block;

   Report.Result;

end CXB2001;