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-- CD30002.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 implementation supports Alignments for subtypes and
-- objects specified as factors and multiples of the number of storage
-- elements per word, unless those values cannot be loaded and stored.
-- Check that the largest alignment returned by default is supported.
--
-- Check that the implementation supports Alignments supported by the
-- target linker for stand-alone library-level objects of statically
-- constrained subtypes.
--
-- TEST DESCRIPTION:
-- This test defines several types and objects, specifying various
-- alignments for them (as factors and multiples of the number of
-- storage elements per word). It then checks the alignments by
-- declaring some objects, and checking that the integer values of
-- their addresses is mod the specified alignment. This will not
-- prevent false passes where the lucky compiler gets it right by
-- chance, but will catch compilers that specifically do not obey
-- the alignment clauses.
--
-- APPLICABILITY CRITERIA:
-- All implementations must attempt to compile this test.
--
-- For implementations validating against Systems Programming Annex (C):
-- this test must execute and report PASSED.
--
-- For implementations not validating against Annex C:
-- this test may report compile time errors at one or more points
-- indicated by "-- ANX-C RQMT", in which case it may be graded as inapplicable.
-- Otherwise, the test must execute and report PASSED.
--
--
-- CHANGE HISTORY:
-- 22 JUL 95 SAIC Initial version
-- 09 MAY 96 SAIC Strengthened for 2.1
-- 26 FEB 97 PWB.CTA Allowed for unexpected word sizes
-- 16 FEB 98 EDS Modified documentation.
-- 26 SEP 98 RLB Fixed value on line 130 so check and dec. match.
-- 30 OCT 98 RLB Split Multiple_Alignment and revised the
-- calculation to work on all targets.
-- 18 JAN 99 RLB Repaired again to work on targets where word size
-- equals storage unit.
--!
----------------------------------------------------------------- CD30002_0
with Impdef;
with System.Storage_Elements;
package CD30002_0 is
S_Units_per_Word : constant := System.Word_Size/System.Storage_Unit;
-- Must be 1 or greater.
Multiple_Type_Alignment : constant :=
Integer'Min ( Impdef.Max_Default_Alignment,
2 * S_Units_per_Word );
-- Calculate a reasonable alignment, but not larger than the
-- implementation is required to support.
Multiple_Object_Alignment : constant :=
Integer'Min ( Impdef.Max_Linker_Alignment,
2 * S_Units_per_Word );
-- Calculate a reasonable object alignment, but not larger than
-- the implementation is required to support.
Small_Alignment : constant :=
Integer'Max ( S_Units_per_Word / 2, 1);
-- Calculate a reasonable small alignment, but not less than 1.
-- (If S_Units_per_Word = 1, 1/2 => 0 which causes problems
-- verifying alignment.)
subtype Storage_Element is System.Storage_Elements.Storage_Element;
type Some_Stuff is array(1..S_Units_Per_Word) of Storage_Element;
for Some_Stuff'Alignment
use Impdef.Max_Default_Alignment; -- ANX-C RQMT.
Library_Level_Object : Some_Stuff;
for Library_Level_Object'Alignment
use Impdef.Max_Linker_Alignment; -- ANX-C RQMT.
type Quarter is mod 4; -- two bits
for Quarter'Alignment use Small_Alignment; -- ANX-C RQMT.
type Half is mod 16; -- nibble
for Half'Alignment use Multiple_Type_Alignment; -- ANX-C RQMT.
type O_Some_Stuff is array(1..S_Units_Per_Word) of Storage_Element;
type O_Quarter is mod 4; -- two bits
type O_Half is mod 16; -- nibble
end CD30002_0;
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
-- there is no package body CD30002_0
------------------------------------------------------------------- CD30002
with Report;
with Impdef;
with CD30002_0;
with System.Storage_Elements;
procedure CD30002 is
My_Stuff : CD30002_0.Some_Stuff;
-- Impdef.Max_Default_Alignment
My_Quarter : CD30002_0.Quarter;
-- CD30002_0.S_Units_per_Word / 2
My_Half : CD30002_0.Half;
-- CD30002_0.S_Units_per_Word * 2
Stuff_Object : CD30002_0.O_Some_Stuff;
for Stuff_Object'Alignment
use Impdef.Max_Default_Alignment; -- ANX-C RQMT.
Quarter_Object : CD30002_0.O_Quarter;
for Quarter_Object'Alignment
use CD30002_0.Small_Alignment; -- ANX-C RQMT.
Half_Object : CD30002_0.O_Half;
for Half_Object'Alignment
use CD30002_0.Multiple_Object_Alignment; -- ANX-C RQMT.
subtype IntAdd is System.Storage_Elements.Integer_Address;
use type System.Storage_Elements.Integer_Address;
function A2I(Value: System.Address) return IntAdd renames
System.Storage_Elements.To_Integer;
NAC : constant String := " not aligned correctly";
begin -- Main test procedure.
Report.Test ("CD30002", "Check that the implementation supports " &
"Alignments for subtypes and objects specified " &
"as factors and multiples of the number of " &
"storage elements per word, unless those values " &
"cannot be loaded and stored. Check that the " &
"largest alignment returned by default is " &
"supported. Check that the implementation " &
"supports Alignments supported by the target " &
"linker for stand-alone library-level objects " &
"of statically constrained subtypes" );
if A2I(CD30002_0.Library_Level_Object'Address)
mod Impdef.Max_Linker_Alignment /= 0 then
Report.Failed("Library_Level_Object" & NAC);
end if;
if A2I(My_Stuff'Address) mod Impdef.Max_Default_Alignment /= 0 then
Report.Failed("Max alignment subtype" & NAC);
end if;
if A2I(My_Quarter'Address) mod (CD30002_0.Small_Alignment) /= 0 then
Report.Failed("Factor of words subtype" & NAC);
end if;
if A2I(My_Half'Address) mod (CD30002_0.Multiple_Type_Alignment) /= 0 then
Report.Failed("Multiple of words subtype" & NAC);
end if;
if A2I(Stuff_Object'Address) mod Impdef.Max_Default_Alignment /= 0 then
Report.Failed("Stuff alignment object" & NAC);
end if;
if A2I(Quarter_Object'Address)
mod (CD30002_0.Small_Alignment) /= 0 then
Report.Failed("Factor of words object" & NAC);
end if;
if A2I(Half_Object'Address) mod (CD30002_0.Multiple_Object_Alignment) /= 0 then
Report.Failed("Multiple of words object" & NAC);
end if;
Report.Result;
end CD30002;
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