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--- IMPDEFG.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.
---*
---
--- DESCRIPTION:
--- This package provides tailorable entities for a particular
--- implementation. Each entity may be modified to suit the needs
--- of the implementation. Default values are provided to act as
--- a guide.
---
--- The entities in this package are those which are used exclusively
--- in tests for Annex G (Numerics).
---
--- APPLICABILITY CRITERIA:
--- This package is only required for implementations validating the
--- Numerics Annex.
---
--- CHANGE HISTORY:
--- 29 Jan 96 SAIC Initial version for ACVC 2.1.
---
---!
-
-package ImpDef.Annex_G is
-
---=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====--
-
- -- This function must return a "negative zero" value for implementations
- -- for which Float'Signed_Zeros is True.
-
- function Negative_Zero return Float;
-
---=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====--
-
-end ImpDef.Annex_G;
-
-
- --==================================================================--
-
-
-package body ImpDef.Annex_G is
-
-
---=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====--
-
- -- This function must return a negative zero value for implementations
- -- for which Float'Signed_Zeros is True.
- -- We generate the smallest normalized negative number, and divide by a
- -- few powers of two to obtain a number whose absolute value equals zero
- -- but whose sign is negative.
-
- function Negative_Zero return Float is
- negz : float := -1.0 *
- float (float'Machine_Radix)
- ** ( Float'Machine_Emin - Float'Machine_Mantissa);
- begin
- return negz / 8.0;
- end Negative_Zero;
-
---=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====-=====--
-
-end ImpDef.Annex_G;
-