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--- CXB2003.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 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 32 bits.
---
--- TEST DESCRIPTION:
--- This test uses the shift and rotate functions of package Interfaces
--- with a modular type representative of 32 bits. The functions
--- are used as the right hand of assignment statements, as part of
--- conditional statements, and as arguments in other function calls.
---
--- APPLICABILITY CRITERIA:
--- This test is applicable to all implementations that support signed
--- and modular integer types of 32 bits.
---
---
--- CHANGE HISTORY:
--- 23 Aug 95 SAIC Initial prerelease version.
--- 07 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
--- 26 Oct 96 SAIC Removed all references to Big/Little endian.
---
---!
-
-with Report;
-with Interfaces;
-with Ada.Exceptions;
-
-procedure CXB2003 is
-begin
-
- Report.Test ("CXB2003",
- "Check that subprograms Shift_Left, Shift_Right, " &
- "Shift_Right_Arithmetic, Rotate_Left, and Rotate_Right " &
- "are available and produce correct results");
-
- Test_Block:
- declare
-
- use Interfaces;
- use Ada.Exceptions;
-
- TC_Amount : Natural := Natural'First;
-
- -- Range of type Unsigned_32 is 0..(2**32)-1 (0..Modulus-1).
- TC_Val_Unsigned_32,
- TC_Result_Unsigned_32 : Unsigned_32 := Unsigned_32'First;
-
- begin
-
- -- 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.
-
- TC_Amount := 2;
- TC_Val_Unsigned_32 := Unsigned_32'Last;
- TC_Result_Unsigned_32 := Shift_Left(TC_Val_Unsigned_32, TC_Amount);
-
- if TC_Result_Unsigned_32 /= Unsigned_32'Last - (2**0 + 2**1) then
- Report.Failed("Incorrect result from Shift_Left - 1");
- end if;
-
- TC_Result_Unsigned_32 := Unsigned_32'Last - (2**0 + 2**1 + 2**2 +
- 2**3 + 2**4);
- if Shift_Left(TC_Val_Unsigned_32, 5) /= TC_Result_Unsigned_32 or
- Shift_Left(TC_Val_Unsigned_32, 0) /= Unsigned_32'Last
- then
- Report.Failed("Incorrect result from Shift_Left - 2");
- end if;
-
-
- -- Function Shift_Right.
-
- TC_Amount := 3;
- TC_Val_Unsigned_32 := Unsigned_32'Last;
- TC_Result_Unsigned_32 := Shift_Right(Value => TC_Val_Unsigned_32,
- Amount => TC_Amount);
- if TC_Result_Unsigned_32 /=
- Unsigned_32'Last - (2**31 + 2**30 + 2**29)
- then
- Report.Failed("Incorrect result from Shift_Right - 1");
- end if;
-
- if Shift_Right(TC_Val_Unsigned_32, 0) /= Unsigned_32'Last or
- Shift_Right(TC_Val_Unsigned_32, 2) /= Unsigned_32'Last -
- (2**31 + 2**30)
- then
- Report.Failed("Incorrect result from Shift_Right - 2");
- end if;
-
-
- -- Tests of Shift_Left and Shift_Right in combination.
-
- TC_Val_Unsigned_32 := Unsigned_32'Last;
-
- if Shift_Left(Shift_Right(TC_Val_Unsigned_32, 4), 4) /=
- Unsigned_32'Last - (2**0 + 2**1 + 2**2 + 2**3) or
- Shift_Left(Shift_Right(TC_Val_Unsigned_32, 3), 1) /=
- Unsigned_32'Last - (2**31 + 2**30 + 2**0) or
- Shift_Left(Shift_Right(TC_Val_Unsigned_32, 5), 3) /=
- Unsigned_32'Last - (2**31 + 2**30 + 2**2 + 2**1 + 2**0) or
- Shift_Right(Shift_Left(TC_Val_Unsigned_32, 2), 1) /=
- Unsigned_32'Last - (2**31 + 2**0)
- then
- Report.Failed("Incorrect result from Shift_Left - " &
- "Shift_Right functions used in combination");
- end if;
-
-
- -- Function Shift_Right_Arithmetic.
-
- -- Case where the parameter Value is less than
- -- one half of the modulus. Zero bits will be shifted in.
-
- TC_Amount := 3;
- TC_Val_Unsigned_32 := 2**15 + 2**10 + 2**1;
- TC_Result_Unsigned_32 := Shift_Right_Arithmetic(TC_Val_Unsigned_32,
- TC_Amount);
- if TC_Result_Unsigned_32 /= (2**12 + 2**7) then
- Report.Failed
- ("Incorrect result from Shift_Right_Arithmetic - 1");
- end if;
-
- if Shift_Right_Arithmetic(TC_Val_Unsigned_32, 0) /=
- TC_Val_Unsigned_32 or
- Shift_Right_Arithmetic(TC_Val_Unsigned_32, 5) /=
- (2**10 + 2**5)
- then
- Report.Failed
- ("Incorrect result from Shift_Right_Arithmetic - 2");
- 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_32 := 2**31; -- One half of modulus
- TC_Result_Unsigned_32 := Shift_Right_Arithmetic(TC_Val_Unsigned_32,
- TC_Amount);
- if TC_Result_Unsigned_32 /= (2**31 + 2**30) then
- Report.Failed
- ("Incorrect result from Shift_Right_Arithmetic - 3");
- end if;
-
- TC_Amount := 1;
- TC_Val_Unsigned_32 := (2**31 + 2**1);
- TC_Result_Unsigned_32 := Shift_Right_Arithmetic(TC_Val_Unsigned_32,
- TC_Amount);
- if TC_Result_Unsigned_32 /= (2**31 + 2**30 + 2**0) then
- Report.Failed
- ("Incorrect result from Shift_Right_Arithmetic - 4");
- end if;
-
- if Shift_Right_Arithmetic(TC_Val_Unsigned_32, 0) /=
- TC_Val_Unsigned_32 or
- Shift_Right_Arithmetic(TC_Val_Unsigned_32, 3) /=
- (2**31 + 2**30 + 2**29 + 2**28)
- then
- Report.Failed
- ("Incorrect result from Shift_Right_Arithmetic - 5");
- end if;
-
-
- -- Function Rotate_Left.
-
- TC_Amount := 3;
- TC_Val_Unsigned_32 := Unsigned_32'Last;
- TC_Result_Unsigned_32 := Rotate_Left(Value => TC_Val_Unsigned_32,
- Amount => TC_Amount);
- if TC_Result_Unsigned_32 /= Unsigned_32'Last then
- Report.Failed("Incorrect result from Rotate_Left - 1");
- end if;
-
- TC_Val_Unsigned_32 := 2**31 + 2**30;
- if Rotate_Left(TC_Val_Unsigned_32, 1) /= (2**31 + 2**0) or
- Rotate_Left(TC_Val_Unsigned_32, 5) /= (2**4 + 2**3) or
- Rotate_Left(TC_Val_Unsigned_32, 32) /= TC_Val_Unsigned_32
- then
- Report.Failed("Incorrect result from Rotate_Left - 2");
- end if;
-
-
- -- Function Rotate_Right.
-
- TC_Amount := 2;
- TC_Val_Unsigned_32 := (2**1 + 2**0);
- TC_Result_Unsigned_32 := Rotate_Right(Value => TC_Val_Unsigned_32,
- Amount => TC_Amount);
- if TC_Result_Unsigned_32 /= (2**31 + 2**30) then
- Report.Failed("Incorrect result from Rotate_Right - 1");
- end if;
-
- if Rotate_Right(TC_Val_Unsigned_32, 3) /= (2**30 + 2**29) or
- Rotate_Right(TC_Val_Unsigned_32, 6) /= (2**27 + 2**26) or
- Rotate_Right(TC_Val_Unsigned_32, 32) /= (2**1 + 2**0)
- then
- Report.Failed("Incorrect result from Rotate_Right - 2");
- end if;
-
-
- -- Tests of Rotate_Left and Rotate_Right in combination.
-
- TC_Val_Unsigned_32 := (2**31 + 2**15 + 2**3);
-
- if Rotate_Left(Rotate_Right(TC_Val_Unsigned_32, 4), 3) /=
- (2**30 + 2**14 + 2**2) or
- Rotate_Left(Rotate_Right(TC_Val_Unsigned_32, 1), 3) /=
- (2**17 + 2**5 + 2**1) or
- Rotate_Right(Rotate_Left(TC_Val_Unsigned_32, 3), 7) /=
- (2**31 + 2**27 + 2**11) or
- Rotate_Right(Rotate_Left(TC_Val_Unsigned_32, 1), 32) /=
- (2**16 + 2**4 + 2**0)
- then
- Report.Failed("Incorrect result from Rotate_Left - " &
- "Rotate_Right functions used in combination");
- 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 CXB2003;
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