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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [testsuite/] [ada/] [acats/] [tests/] [c4/] [c490003.a] - Blame information for rev 294

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1 294 jeremybenn
-- C490003.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that a static expression is legal if its evaluation fails
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--      no language-defined check other than Overflow_Check. Check that such
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--      a static expression is legal if it is part of a larger static
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--      expression, even if its value is outside the base range of the
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--      expected type.
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--
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--      Check that if a static expression is part of the right operand of a
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--      short circuit control form whose value is determined by its left
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--      operand, it is not evaluated.
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--
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--      Check that a static expression in a non-static context is evaluated
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--      exactly.
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--
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-- TEST DESCRIPTION:
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--      The first part of the objective is tested by constructing static
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--      expressions which involve predefined operations of integer, floating
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--      point, and fixed point subtypes. Intermediate expressions within the
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--      static expressions have values outside the base range of the expected
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--      type. In one case, the extended-range intermediates are compared as
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--      part of a boolean expression. In the remaining two cases, further
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--      predefined operations on the intermediates bring the final result
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--      within the base range. An implementation which compiles these static
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--      expressions satisfies this portion of the objective. A check is
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--      performed at run-time to ensure that the static expressions evaluate
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--      to values within the base range of their respective expected types.
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--
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--      The second part of the objective is tested by constructing
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--      short-circuit control forms whose left operands have the values
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--      shown below:
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--
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--         (TRUE)  or else  (...)
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--         (FALSE) and then (...)
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--
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--      In both cases the left operand determines the value of the condition.
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--      In the test each right operand involves a division by zero, which will
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--      raise Constraint_Error if evaluated. A check is made that no exception
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--      is raised when each short-circuit control form is evaluated, and that
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--      the value of the condition is that of the left operand.
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--
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--      The third part of the objective is tested by evaluating static
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--      expressions involving many operations in contexts which do not
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--      require a static expression, and verifying that the exact
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--      mathematical results are calculated.
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--
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--
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-- CHANGE HISTORY:
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--      15 Sep 95   SAIC    Initial prerelease version for ACVC 2.1.
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--      20 Oct 96   SAIC    Modified expressions in C490003_0 to avoid
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--                          the use of universal operands.
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--
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--!
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with System;
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package C490003_0 is
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   type My_Flt is digits System.Max_Digits;
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   Flt_Range_Diff : My_Flt := (My_Flt'Base'Last - My_Flt'Base'First) -
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                              (My_Flt'Last - My_Flt'First);           -- OK.
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   type My_Fix is delta 0.125 range -128.0 .. 128.0;
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   Symmetric : Boolean := (My_Fix'Base'Last - My_Fix'Base'First) =
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                          (My_Fix'Base'Last + My_Fix'Base'Last);      -- OK.
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   Center : constant Integer := Integer'Base'Last -
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                                 (Integer'Base'Last -
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                                  Integer'Base'First) / 2;            -- OK.
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end C490003_0;
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     --==================================================================--
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with Ada.Numerics;
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package C490003_1 is
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   Zero       : constant := 0.0;
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   Pi         : constant := Ada.Numerics.Pi;
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   Two_Pi     : constant := 2.0 * Pi;
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   Half_Pi    : constant := Pi/2.0;
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   Quarter    : constant := 90.0;
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   Half       : constant := 180.0;
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   Full       : constant := 360.0;
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   Deg_To_Rad : constant := Half_Pi/90;
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   Rad_To_Deg : constant := 1.0/Deg_To_Rad;
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end C490003_1;
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     --==================================================================--
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with C490003_0;
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with C490003_1;
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with Report;
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procedure C490003 is
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begin
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   Report.Test ("C490003", "Check that static expressions failing "          &
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                "Overflow_Check are legal if part of a larger static "       &
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                "expression. Check that static expressions as right "        &
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                "operands of short-circuit control forms are not "           &
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                "evaluated if value of control form is determined by "       &
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                "left operand. Check that static expressions in non-static " &
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                "contexts are evaluated exactly");
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--
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-- Static expressions within larger static expressions:
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--
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   if C490003_0.Flt_Range_Diff not in C490003_0.My_Flt'Base'Range then
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      Report.Failed ("Error evaluating static expression: floating point");
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   end if;
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   if C490003_0.Symmetric not in Boolean'Range then
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      Report.Failed ("Error evaluating static expression: fixed point");
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   end if;
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   if C490003_0.Center not in Integer'Base'Range then
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      Report.Failed ("Error evaluating static expression: integer");
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   end if;
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--
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-- Short-circuit control forms:
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--
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   declare
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      N : constant := 0.0;
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   begin
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      begin
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         if not ( (N = 0.0) or else (1.0/N > 0.5) ) then
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            Report.Failed ("Error evaluating OR ELSE");
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         end if;
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      exception
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         when Constraint_Error =>
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            Report.Failed ("Right side of OR ELSE was evaluated");
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         when others           =>
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            Report.Failed ("OR ELSE: unexpected exception raised");
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      end;
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      begin
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         if (N /= 0.0) and then (1.0/N <= 0.5) then
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            Report.Failed ("Error evaluating AND THEN");
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         end if;
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      exception
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         when Constraint_Error =>
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            Report.Failed ("Right side of AND THEN was evaluated");
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         when others           =>
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            Report.Failed ("AND THEN: unexpected exception raised");
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      end;
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   end;
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--
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-- Exact evaluation of static expressions:
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--
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   declare
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      use C490003_1;
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      Left  : constant := 6.0 + 0.3125*( (Full*0.375) + (Half/2.4) -
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                             ((Quarter + 36.0)/3.0) )/10.0;            -- 11.25
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      Right : constant := (Pi/3.0) * 1.2 * (15.0/96.0);                -- Pi/16
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   begin
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      if Deg_To_Rad*Left /= Right then
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         Report.Failed ("Static expressions not evaluated exactly: #1");
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      end if;
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      if ((Pi*Rad_To_Deg)*2.0 + 4.0*Quarter)/16.0 /= Rad_To_Deg*(Pi/4.0) then
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         Report.Failed ("Static expressions not evaluated exactly: #2");
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      end if;
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   end;
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   Report.Result;
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end C490003;

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