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-- C460007.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, in a numeric type conversion, if the target type is an
-- integer type and the operand type is real, the result is rounded
-- to the nearest integer, and away from zero if the result is exactly
-- halfway between two integers. Check for static and non-static type
-- conversions.
--
-- TEST DESCRIPTION:
-- The following cases are considered:
--
-- X.5 X.5 + delta -X.5 + delta
-- -X.5 X.5 - delta -X.5 - delta
--
-- Both zero and non-zero values are used for X. The value of delta is
-- chosen to be a very small increment (on the order of 1.0E-10). For
-- fixed and floating point cases, the value of delta is chosen such that
-- "(-)X.5 +(-) delta" is a multiple of the small, or a machine number,
-- respectively.
--
-- The following type conversions are performed:
--
-- ID Real operand Cases Target integer subtype
-- ------------------------------------------------------------------
-- 1 Real named number X.5 Nonstatic
-- 2 X.5 - delta Nonstatic
-- 3 -X.5 - delta Static
-- 4 Real literal -X.5 Static
-- 5 X.5 + delta Static
-- 6 -X.5 + delta Nonstatic
-- 7 Floating point object -X.5 - delta Nonstatic
-- 8 X.5 - delta Static
-- 9 Fixed point object X.5 Static
-- 10 X.5 + delta Static
-- 11 -X.5 + delta Nonstatic
-- The conversion is either assigned to a variable of the target subtype
-- or passed as a parameter to a subprogram (both nonstatic contexts).
--
-- The subprogram Equal is used to circumvent potential optimizations.
--
--
-- CHANGE HISTORY:
-- 03 Oct 95 SAIC Initial prerelease version.
--
--!
with System;
package C460007_0 is
--
-- Target integer subtype (static):
--
type Static_Integer_Subtype is range -32_000 .. 32_000;
Static_Target : Static_Integer_Subtype;
function Equal (L, R: Static_Integer_Subtype) return Boolean;
--
-- Named numbers:
--
NN_Half : constant := 0.5000000000;
NN_Less_Half : constant := 126.4999999999;
NN_More_Half : constant := -NN_Half - 0.0000000001;
--
-- Floating point:
--
type My_Float is digits System.Max_Digits;
Flt_Rnd_Toward_Zero : My_Float := My_Float'Pred(NN_Half);
Flt_Rnd_Away_Zero : constant My_Float := My_Float'Pred(-113.5);
--
-- Fixed point:
--
type My_Fixed is delta 0.1 range -5.0 .. 5.0;
Fix_Half : My_Fixed := 0.5;
Fix_Rnd_Away_Zero : My_Fixed := Fix_Half + My_Fixed'Small;
Fix_Rnd_Toward_Zero : constant My_Fixed := -3.5 + My_Fixed'Small;
end C460007_0;
--==================================================================--
package body C460007_0 is
function Equal (L, R: Static_Integer_Subtype) return Boolean is
begin
return (L = R);
end Equal;
end C460007_0;
--==================================================================--
with C460007_0;
use C460007_0;
with Report;
procedure C460007 is
--
-- Target integer subtype (nonstatic):
--
Limit : Static_Integer_Subtype :=
Static_Integer_Subtype(Report.Ident_Int(128));
subtype Nonstatic_Integer_Subtype is Static_Integer_Subtype
range -Limit .. Limit;
Nonstatic_Target : Static_Integer_Subtype;
begin
Report.Test ("C460007", "Rounding for type conversions of real operand " &
"to integer target");
-- --------------------------
-- Named number/literal cases:
-- --------------------------
Nonstatic_Target := Nonstatic_Integer_Subtype(NN_Half);
if not Equal(Nonstatic_Target, 1) then -- Case 1.
Report.Failed ("Wrong result for named number operand" &
"(case 1), nonstatic target subtype");
end if;
if not Equal(Nonstatic_Integer_Subtype(NN_Less_Half), 126) then -- Case 2.
Report.Failed ("Wrong result for named number operand" &
"(case 2), nonstatic target subtype");
end if;
Static_Target := Static_Integer_Subtype(NN_More_Half);
if not Equal(Static_Target, -1) then -- Case 3.
Report.Failed ("Wrong result for named number operand" &
"(case 3), static target subtype");
end if;
if not Equal(Static_Integer_Subtype(-0.50), -1) then -- Case 4.
Report.Failed ("Wrong result for literal operand" &
"(case 4), static target subtype");
end if;
if not Equal(Static_Integer_Subtype(29_546.5001), 29_547) then -- Case 5.
Report.Failed ("Wrong result for literal operand" &
"(case 5), static target subtype");
end if;
if not Equal(Nonstatic_Integer_Subtype(-66.499), -66) then -- Case 6.
Report.Failed ("Wrong result for literal operand" &
"(case 6), nonstatic target subtype");
end if;
-- --------------------
-- Floating point cases:
-- --------------------
Nonstatic_Target := Nonstatic_Integer_Subtype(Flt_Rnd_Away_Zero);
if not Equal(Nonstatic_Target, -114) then -- Case 7.
Report.Failed ("Wrong result for floating point operand" &
"(case 7), nonstatic target subtype");
end if;
-- Case 8.
if not Equal(Static_Integer_Subtype(Flt_Rnd_Toward_Zero), 0) then
Report.Failed ("Wrong result for floating point operand" &
"(case 8), static target subtype");
end if;
-- -----------------
-- Fixed point cases:
-- -----------------
Static_Target := Static_Integer_Subtype(Fix_Half);
if not Equal(Static_Target, 1) then -- Case 9.
Report.Failed ("Wrong result for fixed point operand" &
"(case 9), static target subtype");
end if;
if not Equal(Static_Integer_Subtype(Fix_Rnd_Away_Zero), 1) then -- Case 10.
Report.Failed ("Wrong result for fixed point operand" &
"(case 10), static target subtype");
end if;
Nonstatic_Target := Nonstatic_Integer_Subtype(Fix_Rnd_Toward_Zero);
if not Equal(Nonstatic_Target, -3) then -- Case 11.
Report.Failed ("Wrong result for fixed point operand" &
"(case 11), nonstatic target subtype");
end if;
Report.Result;
end C460007;
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