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Return ValueThe return value is the product of the elements of ARRAY. If the optional DIM argument ispresent, the product is for the specified dimension. If the optional MASK argument is present, theresult is subject to the logical mask supplied.RADIX 90Return the base of the mo<strong>del</strong> representing numbers of the type and kind of the argument.SynopsisRADIX(X)ArgumentThe argument X is of type integer or real.Return ValueThe return value is an integer with the value of the radix (base) of the number system mo<strong>del</strong> of theargument.RANDOM_NUMBER 90Returns one pseudorandom number or an array of pseudo-random numbers from the uniformdistribution over the range 0 ≤ x < 1.SynopsisRANDOM_NUMBER(HARVEST)ArgumentThe argument HARVEST must of type real. It is set to contain the resulting pseudorandom numberor array of pseudorandom numbers from the uniform distribution.Return ValueRANDOM_NUMBER is a subroutine.DescriptionThe random number intrinsic generates a 46 bit lagged fibonacci pseudo-random sequence with ashort lag of 5 and a long lag of 17. For a given seed, including the default seed, the sequencegenerated is independent of the platform and number of processors. Due to limitations of someplatforms' default integer type, the seed vector is of size 34. Only the least significant 23 bits of234 Chapter 6
each element of the seed array are used, thus a seed array returned or used is portable betweenplatforms. For non-degenerate seed arrays, the period of this generator is (2 17 - 1) * 2 45 . If all theodd elements of the seed array are even, the period will be shorter.For the PGHPF compiler, the best performance on distributed arrays is for block distributions. Thehigher the order of the first distributed dimension, the better the performance will be.RANDOM_SEED 90Restarts or queries the pseudorandom number generator for RANDOM_NUMBER.SynopsisRANDOM_SEED([SIZE] [,PUT] [,GET])ArgumentsThe arguments SIZE, PUT and GET are optional. There must be one or no arguments. Multiplearguments are not allowed. SIZE is an integer value representing the number of integers that theprocessor uses to hold the value of the seed. PUT is an integer array of rank one and is used to setthe seed. GET is an integer array of rank one and is used to get the value of the seed.Return ValueRANDOM_SEED is a subroutine.RANGE 90Return the decimal exponent range for the type of number supplied as an argument.SynopsisRANGE(X)ArgumentThe argument X must be of type integer, real, or complex.Return ValueThe result is an integer.REAL 77Convert the argument to real.Fortran Intrinsics 235
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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
Page 186 and 187: Table 6-5: Fortran 90/95 Bit Manipu
Page 188 and 189: Table 6-8: Fortran 90/95 Array Redu
Page 190 and 191: Table 6-10: Fortran 90/95 Array Con
Page 192 and 193: Generic Name Purpose Numberof ArgsP
Page 194 and 195: Table 6-17: Miscellaneous Functions
Page 196 and 197: ArgumentsThe argument STR is the st
Page 198 and 199: SynopsisALLOCATED(ARRAY)ArgumentThe
Page 200 and 201: SynopsisASIND(X)ArgumentThe argumen
Page 202 and 203: ArgumentThe argument X must be of t
Page 204 and 205: Return ValueReturns a complex numbe
Page 206 and 207: COUNT 90Return the number of true e
Page 208 and 209: VALUES(6)VALUES(7)VALUES(8)holds th
Page 210 and 211: Return ValueThe dot product. For VE
Page 212 and 213: EXPONENT 90Return the exponent part
Page 214 and 215: SynopsisIAND(I, J)ArgumentsThe argu
Page 216 and 217: ArgumentThe arguments I and J must
Page 218 and 219: INT8 § 77Converts a real value to
Page 220 and 221: JINT § 77Converts a value to an in
Page 222 and 223: LEN 90Returns the length of the sup
Page 224 and 225: LLT 90Test the supplied strings to
Page 226 and 227: LSHIFT § 77Perform a logical shift
Page 228 and 229: If the MASK parameter is present, t
Page 230 and 231: MINLOC 90Return the position of the
Page 232 and 233: MVBITS 90Copies a bit sequence from
Page 234 and 235: SynopsisNULL([PTR])ArgumentsThe opt
Page 238 and 239: SynopsisREAL(A [,KIND])ArgumentsThe
Page 240 and 241: ArgumentsThe argument X is of type
Page 242 and 243: Return ValueThe result is an array
Page 244 and 245: SIZE 90Returns either the total num
Page 246 and 247: Return ValueThe return value is the
Page 248 and 249: TRANSFER 90Return a value that has
Page 250 and 251: VERIFY 90Verify that a character st
Page 252 and 253: IntrinsicIALL_SUFFIXIANYIANY_PREFIX
Page 254 and 255: Return ValueThe shifted array with
Page 256 and 257: getloghostnmlstatputenvsymlnkttynam
Page 258 and 259: esyndbesj0dbesj1dbesjndbesy0dbesy1d
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
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destis an integer variable or array
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8 OpenMP Directives for FortranThe
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the parallel region redundantly. Th
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In the presence of an IF clause, th
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!$OMP SINGLE [Clauses]< Fortran cod
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By default, there is an implicit ba
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appear within a parallel region. It
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[!$OMP SECTION]< Fortran code block
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directive. When a common block that
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subroutine omp_unset_lock(integer_v
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9 HPF DirectivesHPF directives are
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ALIGN - REALIGNThe ALIGN directive
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See AlsoThe TEMPLATE and PROCESSORS
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Example!HPF$!HPF$!HPF$!HPF$REAL A(1
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See AlsoFor details on the PROCESSO
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TypeSpecificationSee AlsoFor detail
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IntrinsicGLOBAL_TO_LOCALGLOBAL_UBOU
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Return ValueIf the actual argument
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ArgumentsARRAY may be of any type;
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Return TypeThe result is of type de
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ArgumentsOptional argument. PROC.AR
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IndexABSTRACT_TO_PHYSICAL..........
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DATA ..............................
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GETLOG ............................
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EXP ...............................
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F specifier........................
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LOCAL_UNIDEX.......................
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OpenMP Fortran Directives .........
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DOWHILE ...........................
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FMT specifier......................
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