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1 149 jeremybenn
-- CD30002.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that the implementation supports Alignments for subtypes and
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--      objects specified as factors and multiples of the number of storage
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--      elements per word, unless those values cannot be loaded and stored.
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--      Check that the largest alignment returned by default is supported.
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--
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--      Check that the implementation supports Alignments supported by the
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--      target linker for stand-alone library-level objects of statically
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--      constrained subtypes.
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--
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-- TEST DESCRIPTION:
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--      This test defines several types and objects, specifying various
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--      alignments for them (as factors and multiples of the number of
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--      storage elements per word).  It then checks the alignments by
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--      declaring some objects, and checking that the integer values of
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--      their addresses is mod the specified alignment.  This will not
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--      prevent false passes where the lucky compiler gets it right by
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--      chance, but will catch compilers that specifically do not obey
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--      the alignment clauses.
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--
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-- APPLICABILITY CRITERIA:
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--      All implementations must attempt to compile this test.
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--
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--      For implementations validating against Systems Programming Annex (C):
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--        this test must execute and report PASSED.
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--
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--      For implementations not validating against Annex C:
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--        this test may report compile time errors at one or more points
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--        indicated by "-- ANX-C RQMT", in which case it may be graded as inapplicable.
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--        Otherwise, the test must execute and report PASSED.
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--
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--
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-- CHANGE HISTORY:
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--      22 JUL 95   SAIC   Initial version
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--      09 MAY 96   SAIC   Strengthened for 2.1
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--      26 FEB 97   PWB.CTA Allowed for unexpected word sizes
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--      16 FEB 98   EDS    Modified documentation.
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--      26 SEP 98   RLB    Fixed value on line 130 so check and dec. match.
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--      30 OCT 98   RLB    Split Multiple_Alignment and revised the
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--                         calculation to work on all targets.
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--      18 JAN 99   RLB    Repaired again to work on targets where word size
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--                         equals storage unit.
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--!
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----------------------------------------------------------------- CD30002_0
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with Impdef;
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with System.Storage_Elements;
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package CD30002_0 is
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  S_Units_per_Word : constant := System.Word_Size/System.Storage_Unit;
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        -- Must be 1 or greater.
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  Multiple_Type_Alignment : constant :=
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      Integer'Min ( Impdef.Max_Default_Alignment,
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                    2 * S_Units_per_Word );
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      -- Calculate a reasonable alignment, but not larger than the
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      -- implementation is required to support.
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  Multiple_Object_Alignment : constant :=
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      Integer'Min ( Impdef.Max_Linker_Alignment,
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                    2 * S_Units_per_Word );
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      -- Calculate a reasonable object alignment, but not larger than
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      -- the implementation is required to support.
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  Small_Alignment : constant :=
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      Integer'Max ( S_Units_per_Word / 2, 1);
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      -- Calculate a reasonable small alignment, but not less than 1.
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      -- (If S_Units_per_Word = 1, 1/2 => 0 which causes problems
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      -- verifying alignment.)
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  subtype Storage_Element is System.Storage_Elements.Storage_Element;
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  type Some_Stuff is array(1..S_Units_Per_Word) of Storage_Element;
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    for Some_Stuff'Alignment
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      use Impdef.Max_Default_Alignment;                       -- ANX-C RQMT.
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  Library_Level_Object : Some_Stuff;
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    for Library_Level_Object'Alignment
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      use Impdef.Max_Linker_Alignment;                        -- ANX-C RQMT.
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  type Quarter is mod 4; -- two bits
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    for Quarter'Alignment use Small_Alignment;                -- ANX-C RQMT.
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  type Half is mod 16; -- nibble
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    for Half'Alignment use Multiple_Type_Alignment;                -- ANX-C RQMT.
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  type O_Some_Stuff is array(1..S_Units_Per_Word) of Storage_Element;
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  type O_Quarter is mod 4; -- two bits
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  type O_Half is mod 16; -- nibble
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end CD30002_0;
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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-- there is no package body CD30002_0
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------------------------------------------------------------------- CD30002
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with Report;
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with Impdef;
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with CD30002_0;
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with System.Storage_Elements;
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procedure CD30002 is
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  My_Stuff   : CD30002_0.Some_Stuff;
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    -- Impdef.Max_Default_Alignment
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  My_Quarter : CD30002_0.Quarter;
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    -- CD30002_0.S_Units_per_Word / 2
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  My_Half    : CD30002_0.Half;
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    -- CD30002_0.S_Units_per_Word * 2
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  Stuff_Object   : CD30002_0.O_Some_Stuff;
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    for Stuff_Object'Alignment
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      use Impdef.Max_Default_Alignment;                       -- ANX-C RQMT.
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  Quarter_Object : CD30002_0.O_Quarter;
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    for Quarter_Object'Alignment
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        use CD30002_0.Small_Alignment;                        -- ANX-C RQMT.
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  Half_Object    : CD30002_0.O_Half;
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    for Half_Object'Alignment
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        use CD30002_0.Multiple_Object_Alignment;              -- ANX-C RQMT.
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  subtype IntAdd is System.Storage_Elements.Integer_Address;
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    use type System.Storage_Elements.Integer_Address;
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  function A2I(Value: System.Address) return IntAdd renames
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    System.Storage_Elements.To_Integer;
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  NAC : constant String := " not aligned correctly";
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begin  -- Main test procedure.
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  Report.Test ("CD30002", "Check that the implementation supports " &
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                          "Alignments for subtypes and objects specified " &
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                          "as factors and multiples of the number of " &
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                          "storage elements per word, unless those values " &
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                          "cannot be loaded and stored. Check that the " &
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                          "largest alignment returned by default is " &
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                          "supported. Check that the implementation " &
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                          "supports Alignments supported by the target " &
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                          "linker for stand-alone library-level objects " &
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                          "of statically constrained subtypes" );
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  if A2I(CD30002_0.Library_Level_Object'Address)
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     mod Impdef.Max_Linker_Alignment /= 0 then
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    Report.Failed("Library_Level_Object" & NAC);
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  end if;
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  if A2I(My_Stuff'Address) mod Impdef.Max_Default_Alignment /= 0 then
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    Report.Failed("Max alignment subtype" & NAC);
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  end if;
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  if A2I(My_Quarter'Address) mod (CD30002_0.Small_Alignment) /= 0 then
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    Report.Failed("Factor of words subtype" & NAC);
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  end if;
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  if A2I(My_Half'Address) mod (CD30002_0.Multiple_Type_Alignment) /= 0 then
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    Report.Failed("Multiple of words subtype" & NAC);
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  end if;
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  if A2I(Stuff_Object'Address) mod Impdef.Max_Default_Alignment /= 0 then
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    Report.Failed("Stuff alignment object" & NAC);
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  end if;
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  if A2I(Quarter_Object'Address)
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       mod (CD30002_0.Small_Alignment) /= 0 then
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    Report.Failed("Factor of words object" & NAC);
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  end if;
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  if A2I(Half_Object'Address) mod (CD30002_0.Multiple_Object_Alignment) /= 0 then
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    Report.Failed("Multiple of words object" & NAC);
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  end if;
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  Report.Result;
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end CD30002;

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