| -- 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; |
