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-- C45323A.ADA

--                             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 THE NONASSOCIATIVITY OF REAL ARITHMETIC IS PRESERVED

--     FOR FLOATING POINT PRECISION 5, EVEN WHEN OPTIMIZATION WOULD

--     BENEFIT IF FLOATING POINT ADDITION WERE ASSOCIATIVE.

-- HISTORY:

--     JET 08/10/88  CREATED ORIGINAL TEST.

WITH REPORT; USE REPORT;

PROCEDURE C45323A IS

     TYPE FLOAT5 IS DIGITS 5;

     A, B, C, D, E : FLOAT5;

     FUNCTION IDENT(F : FLOAT5) RETURN FLOAT5 IS

     BEGIN

          RETURN F * FLOAT5(IDENT_INT(1));

     END IDENT;

BEGIN

     TEST ("C45323A", "CHECK THAT THE NONASSOCIATIVITY OF REAL " &

                      "ARITHMETIC IS PRESERVED FOR FLOATING POINT " &

                      "PRECISION 5, EVEN WHEN OPTIMIZATION WOULD " &

                      "BENEFIT IF FLOATING POINT ADDITION WERE " &

                      "ASSOCIATIVE");

     B := 2#0.1010_1010_1010_1010_10#E3;

     A := -B;

     C := 2#0.1000_0000_0000_0000_00#E-18;

     D := B + C;

     E := A + B + C;

     IF IDENT(A) + IDENT(B) /= 0.0 THEN

          FAILED("INCORRECT VALUE OF A + B");

     END IF;

     IF IDENT(E) /= IDENT(C) THEN

          FAILED("C DOES NOT EQUAL E");

     END IF;

     RESULT;

END C45323A;