HP Fortran Programmer's Reference

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Intrinsic procedures The following topics are described in this chapter: 468 Basic terms and concepts Nonstandard intrinsic procedures Data representation models Functional categories of intrinsic procedures Intrinsic procedure specifications NOTE HP Fortran intrinsic procedures are provided in the libraries /opt/fortran90/lib/libF90.a and /usr/lib/libcl.a. /usr/lib/libcl.2 is used instead of libcl.a if using shared libraries (the default). Chapter 11
Basic terms and concepts Intrinsic procedures Basic terms and concepts The following sections describe the terms and concepts that are used in this chapter to describe intrinsic procedures. Availability of intrinsics An intrinsic procedure is available in every Fortran 90 program unit except when an intrinsic and a user-defined procedure (or a library procedure) have the same name, and the user-defined procedure: Has the EXTERNAL attribute; see “EXTERNAL (statement and attribute)” on page 324 for more information. Library routines are declared in the user program with the EXTERNAL attribute so that they will be called instead of intrinsics that have the same name. Has an explicit interface; see “Procedure interface” on page 149 for a description. A statement function has an explicit interface and therefore, if it has the same name as an intrinsic, will be recognized instead of the intrinsic. Both a user-defined procedure and an intrinsic may have the same name when the user-defined procedure is used to extend a generic intrinsic and the argument types differ. See “Generic procedures” on page 151 for a description of this. Subroutine and function intrinsics Intrinsic procedures are available as functions and subroutines. In general, they behave the same as user-defined subroutines and functions. Intrinsic subroutines are invoked by the CALL statement and can return values through arguments passed to the intrinsic. Intrinsic functions can be referenced as part of an expression or in a statement that expects a value. All interface intrinsic subroutines and functions have an explicit interface. Generic and specific function names The names of intrinsic functions can be either generic or specific. The name is generic—for example, ABS—if it permits arguments of different types. A name is specific—for example, IABS—if it permits arguments of one data type only. A specific intrinsic function can be passed as an argument if it has the INTRINSIC attribute. A generic intrinsic function can have the INTRINSIC attribute if it is also the specific name, as in the case of the SIN intrinsic. See “Procedure dummy argument” on page 142 and the description of “INTRINSIC (statement and attribute)” on page 359. Chapter 11 469
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HP Fortran Programmer’s Reference
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Notice Copyright 1979-2003 Hewlett-
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Contents vi Structurecomponent ....
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Contents viii INTENTattribute......
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Contents x ASSIGN .................
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Contents xii RECORD (extension) ...
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Contents xiv CSHIFT(ARRAY,SHIFT,DIM
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Contents xvi LOC(X)................
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Contents xviii TRANSPOSE(MATRIX)...
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Tables Table9-10.D,E,F,andGeditdesc
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The HP Fortran Programmer’s Refer
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Notational conventions This section
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xxvi Either a or b must be supplied
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NOTE Many of these documents are ac
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Introduction to HP Fortran 2 Data t
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Introduction to HP Fortran HP Fortr
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Introduction to HP Fortran HP Fortr
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Language elements 8 Lexical tokens
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Language elements Lexical tokens Le
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Language elements Program structure
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Language elements Statements Statem
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Language elements Source format of
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Language elements INCLUDE line 22 C
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Data types and data objects 24 Deri
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Data types and data objects Intrins
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Data types and data objects Derived
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Data types and data objects Pointer
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Data types and data objects Pointer
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Arrays 54 Array declarations Array-
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Arrays Array fundamentals a(1,2) a(
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Arrays Array declarations For a giv
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Arrays Array declarations If a proc
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Arrays Array declarations Allocatab
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Arrays Array declarations subscript
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Arrays Array sections Array section
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Arrays Array sections ! The arrays
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Arrays Array-valued structure compo
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Arrays Array-valued structure compo
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Arrays Array constructors depends o
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Arrays Array expressions ! the effe
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Arrays Array-valued functions PROGR
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Arrays Array inquiry intrinsics 80
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Expressions and assignment 82 — O
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Expressions and assignment Expressi
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Expressions and assignment Assignme
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Execution control 104 Control const
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Execution control Control construct
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Execution control Flow control stat
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Program units and procedures 122 Te
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Program units and procedures Termin
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Program units and procedures Main p
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Program units and procedures Main p
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Program units and procedures Extern
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Program units and procedures Intern
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Program units and procedures Statem
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Program units and procedures Argume
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Program units and procedures Proced
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Program units and procedures Module
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Program units and procedures Block
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Program units and procedures Block
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I/O and file handling 170 Files Con
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I/O and file handling Files Files A
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I/O and file handling Connecting a
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I/O and file handling Connecting a
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I/O and file handling File access m
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I/O and file handling Nonadvancing
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I/O and file handling I/O statement
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I/O and file handling Syntax of I/O
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I/O and file handling Example progr
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I/O formatting transferring data be
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I/O formatting Format specification
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I/O formatting Edit descriptors Tab
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I/O formatting Edit descriptors del
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I/O formatting Edit descriptors A a
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I/O formatting Edit descriptors 216
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I/O formatting Edit descriptors Qed
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I/O formatting Edit descriptors O (
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I/O formatting Edit descriptors Inp
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I/O formatting Edit descriptors [r
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I/O formatting Embedded format spec
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I/O formatting Format specification
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HP Fortran statements The following
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HP Fortran statements Attributes Ta
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HP Fortran statements ACCEPT (exten
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HP Fortran statements ALLOCATABLE (
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HP Fortran statements ALLOCATE ALLO
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HP Fortran statements ALLOCATE The
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HP Fortran statements AUTOMATIC (ex
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HP Fortran statements BACKSPACE BAC
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HP Fortran statements BLOCK DATA BL
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HP Fortran statements BUFFER IN (ex
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HP Fortran statements BUFFER OUT (e
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HP Fortran statements BYTE (extensi
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HP Fortran statements CALL 4. Contr
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HP Fortran statements CASE low: For
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HP Fortran statements CHARACTER CHA
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HP Fortran statements CHARACTER 264
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HP Fortran statements CLOSE Descrip
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HP Fortran statements COMMON COMMON
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HP Fortran statements COMMON ! comm
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HP Fortran statements COMPLEX Descr
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HP Fortran statements CONTAINS CONT
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HP Fortran statements CONTINUE CONT
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HP Fortran statements CYCLE Related
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HP Fortran statements DATA 280 Proc
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HP Fortran statements DATA 282 “I
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HP Fortran statements DEALLOCATE Ex
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HP Fortran statements DECODE (exten
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HP Fortran statements DIMENSION (st
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HP Fortran statements DIMENSION (st
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HP Fortran statements DO DO Control
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HP Fortran statements DO DO i = 1,
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HP Fortran statements DOUBLE COMPLE
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HP Fortran statements DOUBLE PRECIS
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HP Fortran statements ELSE ELSE Pro
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HP Fortran statements ELSE IF Relat
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HP Fortran statements ENCODE (exten
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HP Fortran statements ENCODE (exten
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HP Fortran statements END Related s
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HP Fortran statements END (structur
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HP Fortran statements END TYPE END
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HP Fortran statements ENDFILE An en
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HP Fortran statements ENTRY 316 The
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HP Fortran statements ENTRY Here ar
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HP Fortran statements EQUIVALENCE T
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HP Fortran statements EQUIVALENCE C
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HP Fortran statements EXTERNAL (sta
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HP Fortran statements EXTERNAL (sta
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HP Fortran statements FORMAT Relate
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HP Fortran statements FUNCTION Desc
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HP Fortran statements GO TO (comput
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HP Fortran statements IF (arithmeti
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HP Fortran statements IF (logical)
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HP Fortran statements IMPLICIT The
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HP Fortran statements INCLUDE Examp
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HP Fortran statements INQUIRE Table
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HP Fortran statements INQUIRE Relat
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HP Fortran statements INTEGER Descr
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HP Fortran statements INTENT (state
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HP Fortran statements INTENT (state
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HP Fortran statements INTERFACE SUB
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HP Fortran statements INTRINSIC (st
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HP Fortran statements LOGICAL Descr
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HP Fortran statements MAP (extensio
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HP Fortran statements MODULE ... FU
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HP Fortran statements MODULE PROCED
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HP Fortran statements NAMELIST The
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HP Fortran statements NULLIFY Relat
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HP Fortran statements ON (extension
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HP Fortran statements OPEN OPEN Con
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HP Fortran statements OPEN FILE=cha
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HP Fortran statements OPEN Table 10
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HP Fortran statements OPTIONAL (sta
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HP Fortran statements OPTIONAL (sta
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HP Fortran statements PARAMETER (st
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HP Fortran statements PARAMETER (st
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HP Fortran statements PAUSE ! Write
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HP Fortran statements POINTER (Cray
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HP Fortran statements POINTER (stat
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HP Fortran statements POINTER (stat
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HP Fortran statements PRINT Formatt
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HP Fortran statements PRIVATE (stat
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HP Fortran statements PROGRAM PROGR
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HP Fortran statements PUBLIC (state
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HP Fortran statements READ READ Inp
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HP Fortran statements READ IOSTAT=i
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HP Fortran statements READ Namelist
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HP Fortran statements REAL Descript
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HP Fortran statements RECORD (exten
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HP Fortran statements RECORD (exten
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Intrinsic procedures Intrinsic proc
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BLAS and libU77 libraries The libU7
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BLAS and libU77 libraries Calling l
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BLAS and libU77 libraries Calling l
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BLAS and libU77 libraries libU77 ro
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BLAS and libU77 libraries BLAS rout
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BLAS and libU77 libraries BLAS rout
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I/O runtime error messages INTEGER
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I/O runtime error messages Runtime
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Glossary association association Th
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Glossary construct construct Aserie
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Glossary High Performance Fortran (
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Glossary preconnected preconnected
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Glossary type type See data type. t
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Index arrays, 25 derived types, 45
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Index examples, 96 intrinsic, 95 ma
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Index DSYMV, 621 DSYR, 621 DSYR2, 6
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Index hidden length parameter, 146
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Index statement order, 14 continuat
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Index DFLOTI intrinsics function, 5
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Index in expressions, 93 initializa
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Index statement function, 137 when
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Index assigned GO TO, 115, 331 bloc
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Index HSHFT intrinsics function, 53
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Index PRINT, 397 READ, 406 REWIND,
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Index DATE, 504 date and time intri
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Index KNINT, 565 KNOT, 566 KPACK, 5
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Index ISAMAX routine, 620 ISATTY ro
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Index tape input/output routines, 6
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Index derived types, 450 DO loops,
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Index deallocating, 283 declaring,
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Index REAL statement, 411 type decl
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Index filename extensions, 16 fixed
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Index glossary, 643 modules, 317 st
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Index in expressions, 91, 93 triple
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Index Z Zeditdescriptor, 227 ZABS i
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