-- CXB2002.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 16 bits. -- -- TEST DESCRIPTION: -- This test uses the shift and rotate functions of package Interfaces -- with a modular type representative of 16 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 16 bits. -- -- -- CHANGE HISTORY: -- 21 Aug 95 SAIC Initial prerelease version. -- 07 May 96 SAIC Incorporated reviewer comments for ACVC 2.1. -- 26 Oct 96 SAIC Removed subtests based on Big/Little Endian. -- 17 Feb 97 PWB.CTA Corrected "-" to "+" in parenthesized expressions. --! with Report; with Interfaces; with Ada.Exceptions; procedure CXB2002 is begin Report.Test ("CXB2002", "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 16 bits"); Test_Block: declare use Ada.Exceptions; use Interfaces; TC_Amount : Natural := Natural'First; -- Range of type Unsigned_16 is 0..65535 (0..Modulus-1). TC_Val_Unsigned_16, TC_Result_Unsigned_16 : Unsigned_16 := Unsigned_16'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 := 3; TC_Val_Unsigned_16 := Unsigned_16'Last; -- 65535. TC_Result_Unsigned_16 := Shift_Left(TC_Val_Unsigned_16, TC_Amount); if TC_Result_Unsigned_16 /= Unsigned_16'Last - (2**0 + 2**1 + 2**2) then Report.Failed("Incorrect result from Shift_Left - 1"); end if; if Shift_Left(TC_Val_Unsigned_16, 0) /= Unsigned_16'Last or Shift_Left(TC_Val_Unsigned_16, 5) /= Unsigned_16'Last - (2**0 + 2**1 + 2**2 + 2**3 +2**4) or Shift_Left(TC_Val_Unsigned_16, 16) /= 0 then Report.Failed("Incorrect result from Shift_Left - 2"); end if; -- Function Shift_Right. TC_Amount := 3; TC_Val_Unsigned_16 := Unsigned_16'Last; -- 65535. TC_Result_Unsigned_16 := Shift_Right(Value => TC_Val_Unsigned_16, Amount => TC_Amount); if TC_Result_Unsigned_16 /= Unsigned_16'Last-(2**15 + 2**14 + 2**13) then Report.Failed("Incorrect result from Shift_Right - 1"); end if; if Shift_Right(TC_Val_Unsigned_16, 0) /= Unsigned_16'Last or Shift_Right(TC_Val_Unsigned_16, 5) /= Unsigned_16'Last-(2**15 + 2**14 + 2**13 + 2**12 + 2**11) or Shift_Right(TC_Val_Unsigned_16, 16) /= 0 then Report.Failed("Incorrect result from Shift_Right - 2"); end if; -- Tests of Shift_Left and Shift_Right in combination. TC_Val_Unsigned_16 := Unsigned_16'Last; if Shift_Left(Shift_Right(TC_Val_Unsigned_16, 4), 4) /= Unsigned_16'Last-(2**0 + 2**1 + 2**2 + 2**3) or Shift_Left(Shift_Right(TC_Val_Unsigned_16, 1), 3) /= Unsigned_16'Last-(2**0 + 2**1 + 2**2) or Shift_Right(Shift_Left(TC_Val_Unsigned_16, 2), 4) /= Unsigned_16'Last-(2**15+ 2**14 + 2**13 + 2**12) or Shift_Right(Shift_Left(TC_Val_Unsigned_16, 2), 16) /= 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. -- Modulus of type Unsigned_16 is 2**16; one half is 2**15. TC_Amount := 3; TC_Val_Unsigned_16 := 2**15 - 1; -- Less than one half of modulus. TC_Result_Unsigned_16 := Shift_Right_Arithmetic(TC_Val_Unsigned_16, TC_Amount); if TC_Result_Unsigned_16 /= TC_Val_Unsigned_16 - (2**14 + 2**13 + 2**12) then Report.Failed ("Incorrect result from Shift_Right_Arithmetic - 1"); end if; if Shift_Right_Arithmetic(TC_Val_Unsigned_16, 0) /= TC_Val_Unsigned_16 or Shift_Right_Arithmetic(TC_Val_Unsigned_16, 5) /= TC_Val_Unsigned_16 - (2**14 + 2**13 + 2**12 + 2**11 + 2**10) or Shift_Right_Arithmetic(TC_Val_Unsigned_16, 16) /= 0 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_16 := 2**15; -- One half of modulus. TC_Result_Unsigned_16 := Shift_Right_Arithmetic(TC_Val_Unsigned_16, TC_Amount); if TC_Result_Unsigned_16 /= TC_Val_Unsigned_16 + 2**14 then Report.Failed ("Incorrect result from Shift_Right_Arithmetic - 3"); end if; TC_Amount := 1; TC_Val_Unsigned_16 := 2**15 + 1; -- Greater than half of modulus. TC_Result_Unsigned_16 := Shift_Right_Arithmetic(TC_Val_Unsigned_16, TC_Amount); if TC_Result_Unsigned_16 /= TC_Val_Unsigned_16 + 2**14 - 2**0 then Report.Failed ("Incorrect result from Shift_Right_Arithmetic - 4"); end if; if Shift_Right_Arithmetic(TC_Val_Unsigned_16, 0) /= TC_Val_Unsigned_16 or Shift_Right_Arithmetic(TC_Val_Unsigned_16, 4) /= TC_Val_Unsigned_16 - 2**0 + 2**14 + 2**13 + 2**12 + 2**11 or Shift_Right_Arithmetic(TC_Val_Unsigned_16, 16) /= Unsigned_16'Last then Report.Failed ("Incorrect result from Shift_Right_Arithmetic - 5"); end if; -- Function Rotate_Left. TC_Amount := 3; TC_Val_Unsigned_16 := Unsigned_16'Last; -- 65535. TC_Result_Unsigned_16 := Rotate_Left(Value => TC_Val_Unsigned_16, Amount => TC_Amount); if TC_Result_Unsigned_16 /= Unsigned_16'Last then Report.Failed("Incorrect result from Rotate_Left - 1"); end if; TC_Val_Unsigned_16 := 2**15 + 2**14 + 2**1 + 2**0; if Rotate_Left(TC_Val_Unsigned_16, 0) /= 2**15 + 2**14 + 2**1 + 2**0 or Rotate_Left(TC_Val_Unsigned_16, 5) /= 2**6 + 2**5 + 2**4 + 2**3 or Rotate_Left(TC_Val_Unsigned_16, 16) /= TC_Val_Unsigned_16 then Report.Failed("Incorrect result from Rotate_Left - 2"); end if; -- Function Rotate_Right. TC_Amount := 1; TC_Val_Unsigned_16 := 2**1 + 2**0; TC_Result_Unsigned_16 := Rotate_Right(Value => TC_Val_Unsigned_16, Amount => TC_Amount); if TC_Result_Unsigned_16 /= 2**15 + 2**0 then Report.Failed("Incorrect result from Rotate_Right - 1"); end if; if Rotate_Right(TC_Val_Unsigned_16, 0) /= 2**1 + 2**0 or Rotate_Right(TC_Val_Unsigned_16, 5) /= 2**12 + 2**11 or Rotate_Right(TC_Val_Unsigned_16, 16) /= 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_16 := 32769; if Rotate_Left(Rotate_Right(TC_Val_Unsigned_16, 4), 3) /= 49152 or Rotate_Left(Rotate_Right(TC_Val_Unsigned_16, 1), 3) /= 6 or Rotate_Right(Rotate_Left(TC_Val_Unsigned_16, 3), 7) /= 6144 or Rotate_Right(Rotate_Left(TC_Val_Unsigned_16, 1), 16) /= 3 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 CXB2002;