-- 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;