gomp-20050608-branch/gcc/testsuite/ada/acats/tests/c4/c45323a.ada

   1 -- C45323A.ADA
   2
   3 --                             Grant of Unlimited Rights
   4 --
   5 --     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
   6 --     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
   7 --     unlimited rights in the software and documentation contained herein.
   8 --     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
   9 --     this public release, the Government intends to confer upon all
  10 --     recipients unlimited rights  equal to those held by the Government.
  11 --     These rights include rights to use, duplicate, release or disclose the
  12 --     released technical data and computer software in whole or in part, in
  13 --     any manner and for any purpose whatsoever, and to have or permit others
  14 --     to do so.
  15 --
  16 --                                    DISCLAIMER
  17 --
  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
  20 --     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
  21 --     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
  22 --     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 -- OBJECTIVE:
  26 --     CHECK THAT THE NONASSOCIATIVITY OF REAL ARITHMETIC IS PRESERVED
  27 --     FOR FLOATING POINT PRECISION 5, EVEN WHEN OPTIMIZATION WOULD
  28 --     BENEFIT IF FLOATING POINT ADDITION WERE ASSOCIATIVE.
  29
  30 -- HISTORY:
  31 --     JET 08/10/88  CREATED ORIGINAL TEST.
  32
  33 WITH REPORT; USE REPORT;
  34 PROCEDURE C45323A IS
  35
  36      TYPE FLOAT5 IS DIGITS 5;
  37
  38      A, B, C, D, E : FLOAT5;
  39
  40      FUNCTION IDENT(F : FLOAT5) RETURN FLOAT5 IS
  41      BEGIN
  42           RETURN F * FLOAT5(IDENT_INT(1));
  43      END IDENT;
  44
  45 BEGIN
  46      TEST ("C45323A", "CHECK THAT THE NONASSOCIATIVITY OF REAL " &
  47                       "ARITHMETIC IS PRESERVED FOR FLOATING POINT " &
  48                       "PRECISION 5, EVEN WHEN OPTIMIZATION WOULD " &
  49                       "BENEFIT IF FLOATING POINT ADDITION WERE " &
  50                       "ASSOCIATIVE");
  51
  52      B := 2#0.1010_1010_1010_1010_10#E3;
  53      A := -B;
  54      C := 2#0.1000_0000_0000_0000_00#E-18;
  55      D := B + C;
  56      E := A + B + C;
  57
  58      IF IDENT(A) + IDENT(B) /= 0.0 THEN
  59           FAILED("INCORRECT VALUE OF A + B");
  60      END IF;
  61
  62      IF IDENT(E) /= IDENT(C) THEN
  63           FAILED("C DOES NOT EQUAL E");
  64      END IF;
  65
  66      RESULT;
  67 END C45323A;