84 lines
3.0 KiB
Plaintext
84 lines
3.0 KiB
Plaintext
-- 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;
|
|
|