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-- CXA5015.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.
--*
--
-- OBJECTIVE:
-- Check that the following representation-oriented attributes are
-- available and that the produce correct results:
-- 'Denorm, 'Signed_Zeros, 'Exponent 'Fraction, 'Compose, 'Scaling,
-- 'Floor, 'Ceiling, 'Rounding, 'Unbiased_Rounding, 'Truncation,
-- 'Remainder, 'Adjacent, 'Copy_Sign, 'Leading_Part, 'Machine, and
-- 'Model_Small.
--
-- TEST DESCRIPTION:
-- This test checks whether certain attributes of floating point types
-- are available from an implementation. Where attribute correctness
-- can be verified in a straight forward manner, the appropriate checks
-- are included here. However, this test is not intended to ensure the
-- correctness of the results returned from all of the attributes
-- examined in this test; that process will occur in the tests of the
-- Numerics_Annex.
--
--
-- CHANGE HISTORY:
-- 26 Jun 95 SAIC Initial prerelease version.
-- 29 Apr 96 SAIC Incorporated reviewer comments for ACVC 2.1.
-- 01 DEC 97 EDS Fix value for checking the S'Adjacent attribute
--!
with Report;
procedure CXA5015 is
subtype Float_Subtype is Float range -10.0..10.0;
type Derived_Float_1 is digits 8;
type Derived_Float_2 is new Derived_Float_1 range -10.0..10.0E10;
use type Float, Float_Subtype, Derived_Float_1, Derived_Float_2;
TC_Boolean : Boolean;
TC_Float : Float;
TC_SFloat : Float_Subtype;
TC_DFloat_1 : Derived_Float_1;
TC_DFloat_2 : Derived_Float_2;
TC_Tolerance : Float := 0.001;
function Not_Equal (Actual_Result, Expected_Result, Tolerance : Float)
return Boolean is
begin
return abs(Actual_Result - Expected_Result) > Tolerance;
end Not_Equal;
begin
Report.Test ("CXA5015", "Check that certain representation-oriented " &
"attributes are available and that they " &
"produce correct results");
-- New Representation-Oriented Attributes.
--
-- Check the S'Denorm attribute.
TC_Boolean := Float'Denorm;
TC_Boolean := Float_Subtype'Denorm;
TC_Boolean := Derived_Float_1'Denorm;
TC_Boolean := Derived_Float_2'Denorm;
-- Check the S'Signed_Zeroes attribute.
TC_Boolean := Float'Signed_Zeros;
TC_Boolean := Float_Subtype'Signed_Zeros;
TC_Boolean := Derived_Float_1'Signed_Zeros;
TC_Boolean := Derived_Float_2'Signed_Zeros;
-- New Primitive Function Attributes.
--
-- Check the S'Exponent attribute.
TC_Float := 0.5;
TC_SFloat := 0.99;
TC_DFloat_1 := 2.45;
TC_DFloat_2 := 2.65;
if Float'Exponent(TC_Float) > Float_Subtype'Exponent(TC_SFloat) or
Float'Exponent(TC_Float) > 2
then
Report.Failed("Incorrect result from the 'Exponent attribute");
end if;
-- Check the S'Fraction attribute.
if Not_Equal
(Float'Fraction(TC_Float),
TC_Float * Float(Float'Machine_Radix)**(-Float'Exponent(TC_Float)),
TC_Tolerance)
then
Report.Failed("Incorrect result from the 'Fraction attribute - 1");
end if;
if Float'Fraction(TC_Float) <
(1.0/Float(Float'Machine_Radix)) - TC_Tolerance or
Float'Fraction(TC_Float) >= 1.0 - TC_Tolerance
then
Report.Failed("Incorrect result from the 'Fraction attribute - 2");
end if;
-- Check the S'Compose attribute.
if Not_Equal
(Float'Compose(TC_Float, 3),
TC_Float * Float(Float'Machine_Radix)**(3-Float'Exponent(TC_Float)),
TC_Tolerance)
then
Report.Failed("Incorrect result from the 'Compose attribute");
end if;
-- Check the S'Scaling attribute.
if Not_Equal
(Float'Scaling(TC_Float, 2),
TC_Float * Float(Float'Machine_Radix)**2,
TC_Tolerance)
then
Report.Failed("Incorrect result from the 'Scaling attribute");
end if;
-- Check the S'Floor attribute.
TC_Float := 0.99;
TC_SFloat := 1.00;
TC_DFloat_1 := 2.50;
TC_DFloat_2 := -2.50;
if Float'Floor(TC_Float) /= 0.0 or
Float_Subtype'Floor(TC_SFloat) /= 1.0 or
Derived_Float_1'Floor(TC_DFloat_1) /= 2.0 or
Derived_Float_2'Floor(TC_DFloat_2) /= -3.0
then
Report.Failed("Incorrect result from the 'Floor attribute");
end if;
-- Check the S'Ceiling attribute.
TC_Float := 0.99;
TC_SFloat := 1.00;
TC_DFloat_1 := 2.50;
TC_DFloat_2 := -2.99;
if Float'Ceiling(TC_Float) /= 1.0 or
Float_Subtype'Ceiling(TC_SFloat) /= 1.0 or
Derived_Float_1'Ceiling(TC_DFloat_1) /= 3.0 or
Derived_Float_2'Ceiling(TC_DFloat_2) /= -2.0
then
Report.Failed("Incorrect result from the 'Ceiling attribute");
end if;
-- Check the S'Rounding attribute.
TC_Float := 0.49;
TC_SFloat := 1.00;
TC_DFloat_1 := 2.50;
TC_DFloat_2 := -2.50;
if Float'Rounding(TC_Float) /= 0.0 or
Float_Subtype'Rounding(TC_SFloat) /= 1.0 or
Derived_Float_1'Rounding(TC_DFloat_1) /= 3.0 or
Derived_Float_2'Rounding(TC_DFloat_2) /= -3.0
then
Report.Failed("Incorrect result from the 'Rounding attribute");
end if;
-- Check the S'Unbiased_Rounding attribute.
TC_Float := 0.50;
TC_SFloat := 1.50;
TC_DFloat_1 := 2.50;
TC_DFloat_2 := -2.50;
if Float'Unbiased_Rounding(TC_Float) /= 0.0 or
Float_Subtype'Unbiased_Rounding(TC_SFloat) /= 2.0 or
Derived_Float_1'Unbiased_Rounding(TC_DFloat_1) /= 2.0 or
Derived_Float_2'Unbiased_Rounding(TC_DFloat_2) /= -2.0
then
Report.Failed("Incorrect result from the 'Unbiased_Rounding " &
"attribute");
end if;
-- Check the S'Truncation attribute.
TC_Float := -0.99;
TC_SFloat := 1.50;
TC_DFloat_1 := 2.99;
TC_DFloat_2 := -2.50;
if Float'Truncation(TC_Float) /= 0.0 or
Float_Subtype'Truncation(TC_SFloat) /= 1.0 or
Derived_Float_1'Truncation(TC_DFloat_1) /= 2.0 or
Derived_Float_2'Truncation(TC_DFloat_2) /= -2.0
then
Report.Failed("Incorrect result from the 'Truncation attribute");
end if;
-- Check the S'Remainder attribute.
TC_Float := 9.0;
TC_SFloat := 7.5;
TC_DFloat_1 := 5.0;
TC_DFloat_2 := 8.0;
if Float'Remainder(TC_Float, 2.0) /= 1.0 or
Float_Subtype'Remainder(TC_SFloat, 3.0) /= 1.5 or
Derived_Float_1'Remainder(TC_DFloat_1, 2.0) /= 1.0 or
Derived_Float_2'Remainder(TC_DFloat_2, 4.0) /= 0.0
then
Report.Failed("Incorrect result from the 'Remainder attribute");
end if;
-- Check the S'Adjacent attribute.
TC_Float := 4.0;
TC_SFloat := -1.0;
if Float'Adjacent(TC_Float, TC_Float) /= TC_Float or
Float_Subtype'Adjacent(TC_SFloat, -1.0) /= TC_SFloat
then
Report.Failed("Incorrect result from the 'Adjacent attribute");
end if;
-- Check the S'Copy_Sign attribute.
TC_Float := 0.0;
TC_SFloat := -1.0;
TC_DFloat_1 := 5.0;
TC_DFloat_2 := -2.5;
if Float'Copy_Sign(TC_Float, -2.0) /= 0.0 or
Float_Subtype'Copy_Sign(TC_SFloat, 4.0) /= 1.0 or
Derived_Float_1'Copy_Sign(TC_DFloat_1, -2.0) /= -5.0 or
Derived_Float_2'Copy_Sign(TC_DFloat_2, -2.0) /= -2.5
then
Report.Failed("Incorrect result from the 'Copy_Sign attribute");
end if;
-- Check the S'Leading_Part attribute.
TC_Float := 0.0;
TC_SFloat := -1.0;
TC_DFloat_1 := 5.88;
TC_DFloat_2 := -2.52;
-- Leading part obtained in the variables.
TC_Float := Float'Leading_Part(TC_Float, 2);
TC_SFloat := Float_Subtype'Leading_Part(TC_SFloat, 2);
TC_DFloat_1 := Derived_Float_1'Leading_Part(TC_DFloat_1, 2);
TC_DFloat_2 := Derived_Float_2'Leading_Part(TC_DFloat_2, 2);
-- Checking for the leading part of the variables at this point should
-- produce the same values.
if Float'Leading_Part(TC_Float, 2) /= TC_Float or
Float_Subtype'Leading_Part(TC_SFloat, 2) /= TC_SFloat or
Derived_Float_1'Leading_Part(TC_DFloat_1, 2) /= TC_DFloat_1 or
Derived_Float_2'Leading_Part(TC_DFloat_2, 2) /= TC_DFloat_2
then
Report.Failed("Incorrect result from the 'Leading_Part attribute");
end if;
-- Check the S'Machine attribute.
TC_Float := 0.0;
TC_SFloat := -1.0;
TC_DFloat_1 := 5.88;
TC_DFloat_2 := -2.52;
-- Closest machine number obtained in the variables.
TC_Float := Float'Machine(TC_Float);
TC_SFloat := Float_Subtype'Machine(TC_SFloat);
TC_DFloat_1 := Derived_Float_1'Machine(TC_DFloat_1);
TC_DFloat_2 := Derived_Float_2'Machine(TC_DFloat_2);
-- Checking for the closest machine number to each of the variables at
-- this point should produce the same values.
if Float'Machine(TC_Float) /= TC_Float or
Float_Subtype'Machine(TC_SFloat) /= TC_SFloat or
Derived_Float_1'Machine(TC_DFloat_1) /= TC_DFloat_1 or
Derived_Float_2'Machine(TC_DFloat_2) /= TC_DFloat_2
then
Report.Failed("Incorrect result from the 'Machine attribute");
end if;
-- New Model-Oriented Attributes.
--
-- Check the S'Model_Small attribute.
if Not_Equal
(Float'Model_Small,
Float(Float'Machine_Radix)**(Float'Model_Emin-1),
TC_Tolerance)
then
Report.Failed("Incorrect result from the 'Model_Small attribute");
end if;
Report.Result;
end CXA5015;
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