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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;