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9.2 HPF Directive SummaryTable 9-1: HPF Directive SummaryDIRECTIVEALIGNDIMENSIONDISTRIBUTEDYNAMICFUNCTIONSpecifies that a data object is mapped in the same fashion as an associateddata object. This is a specification statement. By default, objects arealigned to themselves.Specifies the dimensions of a template or processor "array". This is aspecification statement.Specifies the mapping of data objects to processors. This is a specificationstatement. By default, objects are not distributed.Specifies that an object may be dynamically realigned or redistributed.INDEPENDENT Preceding a DO loop or FORALL , this directive specifies that the DOloop's iterations do not interact in any way and that the FORALL indexcomputations do not interfere with each other, and thus the FORALL maybe executed in parallel. This is an executable statement. By default,FORALL and DO loops are not assumed to be independent.INHERITNOSEQUENCEPROCESSORSREALIGNREDISTRIBUTESEQUENCETEMPLATESpecifies that a subprogram's dummy argument use the templateassociated with the actual argument for its alignment. This is aspecification statement.Specifies variables that are not sequential. Note that using PGHPF, bydefault variables is not sequential. Variables will be sequential if thecompiler option -Msequence is supplied.Specifies the number and rank of a processor arrangement. This is aspecification statement.This is similar to ALIGN, but is executable. An array can be realigned atany time, if it is declared using the DYNAMIC attribute.This is similar to DISTRIBUTE, but is executable. An array can beredistributed at any time, if it is declared using the DYNAMIC attribute.Specifies that a variable or common block is sequential and requireslinear, standard FORTRAN 77, treatment. This is a specificationstatement.Defines an entity that may be used as an abstract align-target for adistribution or a redistribution. This is a specification statement.306 Chapter 9
ALIGN - REALIGNThe ALIGN directive specifies how data objects are mapped in relation to other data objects. Thedata objects that are most often aligned in HPF programs are arrays. Alignment suggests to thecompiler that entire objects or elements of arrays be stored on the same processor. Operations onobjects that are aligned should be more efficient than operations on objects that are not aligned,assuming that objects that are not aligned may reside on different processors.REALIGN is similar to ALIGN, but is executable. An array can be realigned at any time, if it isdeclared using the DYNAMIC attribute.Syntaxorwhere:!HPF$ ALIGN alignee align-directive-stuff!HPF$ ALIGN align-attribute-stuff :: alignee-listaligneealign-directive-stuffis an object-name.is (align-source-list) align -with-clausealign-attribute-stuff is [(align-source-list)] align -with-clauseEach align-source has the form::*align-dummyEach align-with-clause has the form:WITH align-target [ ( align-subscript-list) ]An align-subscript has the form:int-expalign-subscript-usesubscript-triplet*HPF Directives 307
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While every precaution has been tak
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Table 6-18: HPF Intrinsics and Libr
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• ISO/IEC 1539 : 1991, Informatio
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non-printing characters, such as TA
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1 Language OverviewThis chapter des
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Table 1-1: Order of StatementsOPTIO
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1.3 Free Form FormattingUsing free
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A continuation line is indicated by
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The following examples are invalid
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Operators of equal rank are evaluat
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1.7.3 Relational ExpressionsA relat
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1.9 Assignment StatementsA Fortran
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defined in the character expression
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2 Fortran Data TypesEvery Fortran e
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Table 2-3: Data Type ExtensionsType
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[s]d 1 d 2 ...d n [ _ kind-paramete
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2.2.5 Complex ConstantsA complex co
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CHARACTER(LEN=20) FIRST, LAST, MIDD
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2.4.4 Character SubstringA characte
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• A constant is always either 32
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STRUCTURE [/structure_name/][field_
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RECORD /person/ population(2), me..
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BYTE items(12)END MAPEND UNIONEND S
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declarator, modifying its value dur
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90/95 This statement is either new
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ALLOCATE 90The ALLOCATE statement i
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DescriptionARRAY can be used in a s
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ExamplesBACKSPACE 4BACKSPACE ( UNIT
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ExamplesCALL CRASH! no argumentsCAL
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Note: The data type of a symbol may
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HPFExampleDIMENSION R(10)COMMON /HO
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ALL1is an allocatable COMMON block
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I = I + H..END SUBROUTINE YEND SUBR
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DEALLOCATE 77The DEALLOCATE stateme
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See AlsoREAD, PRINTDIMENSION 90The
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DO (non-block)DO label [,] index =
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DOUBLE COMPLEX § 77The DOUBLE COMP
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SyntaxIF logical expression THENsta
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cfbioserrsis an integer expression
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For example:END FILE(20)END FILE(UN
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e more than one ENTRY statement wit
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EQUIVALENCE 77The EQUIVALENCE state
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extrinsic-kind-keyword is the name
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if no list items are specified; in
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argumentis a symbolic name, startin
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ExampleslistASSIGN 50 TO KGO TO K(5
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IF (Block) 77The block IF statement
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INCLUDE § 77The INCLUDE statement
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FILE= finFORM= fmfin is a character
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DescriptionWhen an INQUIRE by file
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INTEGER, INTENT(OUT)::I1I1=R1END SU
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SUBROUTINE TRIG (X,F,Y)Y=F(X)RETURN
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Manipulating data using union decla
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Using the -I command-line option di
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ERR=errsFILE= finFORM=fmcharacter d
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ACCESSThe value of 'APPEND' will be
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• Case is not significant, unless
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The pointer-based variable does not
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and is roughly equivalent tocharact
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.END MODULETypeNon-executableSee Al
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• Every item whose value is to be
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DescriptionYou create memory storag
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RETURN 77The RETURN statement cause
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line option). Dummy arguments, name
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STRUCTURE § 77The STRUCTURE statem
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argumentis a symbolic name, startin
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Syntax Derived Type DefinitionTYPE
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BYTE num_itemsBYTE items(12)END MAP
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ExamplesINTEGER SCORE(30)CHARACTER
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eal sumsum = 4h()accept sumand is r
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specified with the ":" character ra
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For example:SUBROUTINE YSUM1(M,B,C)
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4.5 CM Fortran Extensions4.5.1 The
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same manner. Direct access files ar
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Table 5-1: OPEN SpecifiersSpecifier
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After data is transferred, the file
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• Repeatable editor commands whic
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On output, the B field descriptor t
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5.5.2.8 G Format ControlThe G forma
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5.5.2.14 O Format Control Octal Val
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The X control specifies a number of
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5.7 List-directed formattingList-di
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Data TypeINTEGER*4INTEGER*8LOGICAL*
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• The value may be constants as a
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Table 6-1: Numeric FunctionsGeneric
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GenericNameIZEXTPurposeZero-ExtendF
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GenericNameREALPurposeConvert toREA
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GenericNamePurposeNumberof ArgsSIN
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GenericNameIANDPurposeLogicalANDNum
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Table 6-5: Fortran 90/95 Bit Manipu
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Table 6-8: Fortran 90/95 Array Redu
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Table 6-10: Fortran 90/95 Array Con
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Generic Name Purpose Numberof ArgsP
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Table 6-17: Miscellaneous Functions
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ArgumentsThe argument STR is the st
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SynopsisALLOCATED(ARRAY)ArgumentThe
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SynopsisASIND(X)ArgumentThe argumen
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ArgumentThe argument X must be of t
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Return ValueReturns a complex numbe
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COUNT 90Return the number of true e
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VALUES(6)VALUES(7)VALUES(8)holds th
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Return ValueThe dot product. For VE
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EXPONENT 90Return the exponent part
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SynopsisIAND(I, J)ArgumentsThe argu
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ArgumentThe arguments I and J must
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INT8 § 77Converts a real value to
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JINT § 77Converts a value to an in
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LEN 90Returns the length of the sup
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LLT 90Test the supplied strings to
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LSHIFT § 77Perform a logical shift
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If the MASK parameter is present, t
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MINLOC 90Return the position of the
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MVBITS 90Copies a bit sequence from
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SynopsisNULL([PTR])ArgumentsThe opt
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Return ValueThe return value is the
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SynopsisREAL(A [,KIND])ArgumentsThe
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ArgumentsThe argument X is of type
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Return ValueThe result is an array
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SIZE 90Returns either the total num
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Return ValueThe return value is the
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TRANSFER 90Return a value that has
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VERIFY 90Verify that a character st
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IntrinsicIALL_SUFFIXIANYIANY_PREFIX
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Return ValueThe shifted array with
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getloghostnmlstatputenvsymlnkttynam
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Page 260 and 261: Descriptionctime converts a system
Page 262 and 263: fgetcGet character from a logical u
Page 264 and 265: Synopsisinteger function fseek(lu,
Page 266 and 267: Synopsisinteger function getc(ch)ch
Page 268 and 269: Synopsisinteger function getuid()De
Page 270 and 271: isattyIs logical unit a tty.Synopsi
Page 272 and 273: DescriptionReturn the value which i
Page 274 and 275: perrorPrint error message.Synopsiss
Page 276 and 277: DescriptionThe functions rand and i
Page 278 and 279: DescriptionReturn the index of the
Page 280 and 281: except lstat returns information ab
Page 282 and 283: ttynamGet name of a terminalSynopsi
Page 284 and 285: 7.2.2 VAX/VMS System SubroutinesDAT
Page 286 and 287: destis an integer variable or array
Page 289 and 290: 8 OpenMP Directives for FortranThe
Page 291 and 292: the parallel region redundantly. Th
Page 293 and 294: In the presence of an IF clause, th
Page 295 and 296: !$OMP SINGLE [Clauses]< Fortran cod
Page 297 and 298: By default, there is an implicit ba
Page 299 and 300: appear within a parallel region. It
Page 301 and 302: [!$OMP SECTION]< Fortran code block
Page 303 and 304: directive. When a common block that
Page 305 and 306: subroutine omp_unset_lock(integer_v
Page 307: 9 HPF DirectivesHPF directives are
Page 311 and 312: See AlsoThe TEMPLATE and PROCESSORS
Page 313 and 314: Example!HPF$!HPF$!HPF$!HPF$REAL A(1
Page 315 and 316: See AlsoFor details on the PROCESSO
Page 317: TypeSpecificationSee AlsoFor detail
Page 320 and 321: IntrinsicGLOBAL_TO_LOCALGLOBAL_UBOU
Page 322 and 323: Return ValueIf the actual argument
Page 324 and 325: ArgumentsARRAY may be of any type;
Page 326 and 327: Return TypeThe result is of type de
Page 328 and 329: ArgumentsOptional argument. PROC.AR
Page 331 and 332: IndexABSTRACT_TO_PHYSICAL..........
Page 333 and 334: DATA ..............................
Page 335 and 336: GETLOG ............................
Page 337 and 338: EXP ...............................
Page 339 and 340: F specifier........................
Page 341 and 342: LOCAL_UNIDEX.......................
Page 343 and 344: OpenMP Fortran Directives .........
Page 345 and 346: DOWHILE ...........................
Page 347: FMT specifier......................
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