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DISTRIBUTE - REDISTRIBUTEThe DISTRIBUTE directive specifies a mapping of data objects to abstract processors in aprocessor arrangement. Distribution partitions an object, in the usual case an array (actually atemplate), among a set of processors.REDISTRIBUTE is similar to DISTRIBUTE, but is executable. An array can be redistributed atany time, if it is declared using the DYNAMIC attributeSyntaxor!HPF$ DISTRIBUTE distributee dist-directive-stuff!HPF$ DISTRIBUTE dist-attribute-stuff :: distributee-listwhere dist-directive-stuff is one of:(dist-format-list)(dist-format-list) ONTO processors-nameThe form of dist-attribute-stuff is one of:(dist-format-list)(dist-format-list) ONTO processors-nameONTO dist-targetThe dist-format may be one of:BLOCK [ (int-expr) ]CYCLIC [ (int-expr)]TypeSpecificationDefaultBy default, each object is replicated and distributed to every processor.See AlsoFor details on the DISTRIBUTE syntax specifications, refer either to Section 4.4 of The HighPerformance Fortran Handbook, or Section 3.3 of the HPF Language Specification.310 Chapter 9
Example!HPF$!HPF$!HPF$!HPF$REAL A(100,100)PROCESSORS PROC(10,10)TEMPLATE T(10,10)ALIGN WITH T:: ADISTRIBUTE (BLOCK,BLOCK) ONTO PROC:: TINDEPENDENTThe INDEPENDENT directive specifies that the iterations of a DO loop, or the computations forthe active index values of a FORALL, do not interfere with each other in any way. Refer to thePGHPF Release notes for details on extensions to the INDEPENDENT directive.SyntaxTypeExecutable!HPF$ INDEPENDENT [, NEW ( variable-list ) ]DefaultBy default, DO and FORALL statements are not independent.See AlsoFor details on the INDEPENDENT syntax specifications, refer either to Section 6.4 of The HighPerformance Fortran Handbook, or Section 4.4 of the HPF Language Specification. Also refer tothe PGHPF Release notes for details on extensions to the INDEPENDENT directive.Example!HPF$INDEPENDENTDO I = 2, N-1X(I) = Y(I-1) + Y(I) + Y(I+1)END DOINHERITThe INHERIT directive specifies that the template for a dummy argument should be the same asthe template for the corresponding actual argument.HPF Directives 311
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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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esyndbesj0dbesj1dbesjndbesy0dbesy1d
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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 and 308: 9 HPF DirectivesHPF directives are
Page 309 and 310: ALIGN - REALIGNThe ALIGN directive
Page 311: See AlsoThe TEMPLATE and PROCESSORS
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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