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
33WITH REPORT; USE REPORT;
34PROCEDURE 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
45BEGIN
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;
67END C45323A;
68