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boundary="_000_DM6PR12MB313081F07DE72F3CFB98DADECB432DM6PR12MB3130namp_" MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR12MB3130.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9da74aac-4824-4f91-d2a1-08dc234319a6 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 Feb 2024 16:30:27.9846 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: +XV8OQQdusKN/VWPX990ImPgMe+4aRYFvSmvJEGzF5JNnjc1gtzPPPlyWz12hYY8qO6F1GKFHgMi172LwZxYFQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB8149 Sender: owner-sc22wg5@open-std.org Precedence: bulk --_000_DM6PR12MB313081F07DE72F3CFB98DADECB432DM6PR12MB3130namp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Bill has mentioned this to me before but I want to verify my understand of = storage sequences. If I have a compiler like Intel Fortran that offers many options to the siz= e of INTEGER to 2/4/8 bytes and REAL to 4/8/16 bytes, the only conforming o= ptions set INTEGER and REAL to the same size and DOUBLE PRECISION to twice = that, correct? This is not intended to pick on Intel because most implementations have the= se options, they just have the most as far as I can see. My goal is to bou= nd the scope of the MPI ABI proposal by only bothering to support conformin= g uses of these options, or these plus the most widely used non-conforming = use (-integer-size 8 -double-size 8). Thanks, Jeff 19.5.3.2 Storage sequence A storage sequence is a sequence of storage units. The size of a storage se= quence is the number of storage units in the storage sequence. A storage un= it is a character storage unit, a numeric storage unit, a file storage unit= (12.3.5), or an unspecified storage unit. The sizes of the numeric storage= unit, the character storage unit and the file storage unit are the values = of constants in the ISO_FORTRAN_ENV intrinsic module (16.10.2). In a storage association context (1) a nonpointer scalar object that is default integer, default real, or de= fault logical occupies a single numeric storage unit, (2) a nonpointer scalar object that is double precision real or default com= plex occupies two contiguous numeric storage units, $ ifort -help data Data ---- -i{2|4|8} set default KIND of integer and logical variables to 2, 4, or 8 -integer-size specifies the default size of integer and logical variables size: 16, 32, 64 -r{8|16} set default size of real to 8 or 16 bytes -real-size specify the size of REAL and COMPLEX declarations, constants, functions, and intrinsics size: 32, 64, 128 -autodouble same as -real-size 64 or -r8 -double-size defines the size of DOUBLE PRECISION and DOUBLE COMPLEX declarati= ons, constants, functions, and intrinsics size: 64, 128 --_000_DM6PR12MB313081F07DE72F3CFB98DADECB432DM6PR12MB3130namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Bill has mentioned this to me before but I want to verify my= understand of storage sequences.

If I have a compiler like Intel Fortran that offers many opt= ions to the size of INTEGER to 2/4/8 bytes and REAL to 4/8/16 bytes, the on= ly conforming options set INTEGER and REAL to the same size and DOUBLE PRECISION to twice that, correct?

This is not intended to pick on Intel because most implement= ations have these options, they just have the most as far as I can see.&nbs= p; My goal is to bound the scope of the MPI ABI proposal by only bothering to support conforming uses of these options, or these pl= us the most widely used non-conforming use (-integer-size 8 -double-size 8)= .

Thanks,

Jeff

19.5.3.2 Storage sequence

A storage sequence is a sequence of storage= units. The size of a storage sequence is the number of storage units in the storage sequence. A storage unit is a character storage unit<= /span>, a numeric storage unit, a file storage unit (12.3.5), or an = unspecified storage unit. The sizes of the numeric storage unit, the character storage unit and the file storage unit are the values of constants in the ISO_FORTRAN_ENV= intrinsic module (16.10.2).

In a storage association context

(1) a nonpointer scalar object that is default integer, default real, or d= efault logical occupies a single numeric storage unit,
(2) a nonpointer scalar object that is double precision real or d= efault complex occupies two contiguous numeric storage units,<= o:p>

 

 

$ ifort -help data<= o:p>

 

Data

----

 

-i{2|4|8}

   &= nbsp;      set default KIND of integer and logical= variables to 2, 4, or 8

-integer-size <s= ize>

   &= nbsp;      specifies the default size of integer a= nd logical variables

   &= nbsp;        size:  16, 32, 64=

-r{8|16}  set = default size of real to 8 or 16 bytes

-real-size <size= >

   &= nbsp;      specify the size of REAL and COMPLEX de= clarations, constants,

   &= nbsp;      functions, and intrinsics

   &= nbsp;        size: 32, 64, 128

-autodouble

   &= nbsp;      same as -real-size 64 or -r8=

-double-size <si= ze>

   &= nbsp;      defines the size of DOUBLE PRECISION an= d DOUBLE COMPLEX declarations,

   &= nbsp;      constants, functions, and intrinsics

   &= nbsp;        size:  64, 128

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