HP Fortran for OpenVMS
User Manual

E
Edit descriptors
See LRM #1
See LRM #2
END branch specifier #1
END branch specifier #2
END branch specifier #3
END branch specifier #4
See also LRM
END statement
effect on program execution
when not to use
ENDFILE statement #1
ENDFILE statement #2
See also LRM
Endian
big and little types
Entry point
main
output listing information
ENTRY statement
See LRM
EOR branch specifier #1
EOR branch specifier #2
See also LRM
EQUIVALENCE statement
and data alignment
and implied-DO loop collapsing
causing data spanning natural boundaries
causing unaligned data #1
causing unaligned data #2
preventing implied-DO loop collapsing
preventing optimizations
See also LRM; Program section
Equivalenced structures
in data-flow and split lifetime analysis
ERR branch specifier #1
ERR branch specifier #2
ERR branch specifier #3
example
See also LRM
Error handling
arithmetic exception handling #1
arithmetic exception handling #2
condition handlers #1
condition handlers #2
list of run-time errors (numeric order)
obtaining secondary status codes
processing performed by HP Fortran RTL
run-time error explanations
See also END; EOR; ERR; IOSTAT; Run-time messages
user controls in I/O statements #1
user controls in I/O statements #2
user controls in I/O statements #3
user controls in I/O statements #4
END, EOR, ERR, and IOSTAT specifiers #1
END, EOR, ERR, and IOSTAT specifiers #2
See also LRM
Error-related command qualifiers
FORTRAN, LINK, RUN (DCL)
summary
Errors
compiler
effect on linker
/ERROR_LIMIT qualifier
fatal
format
See also Messages
severity
source messages
linker #1
linker #2
operating system #1
operating system #2
run-time system #1
run-time system #2
format
handling
requesting precise reporting
requesting traceback information (FORTRAN)
requesting traceback information (LINK)
severity
symbols
using debugger to locate
See also Error handling; Messages; Condition-handler routines
/ERROR_LIMIT qualifier
ERRSNS (compatibility)
example use #1
example use #2
obtaining secondary status codes
Escape sequences
Event handling
See Condition-handler routines
Exception condition
common when using indexed files
definition
See also Condition-handler routines; Error handling
Exception handling
See Arithmetic exception handling
Exceptional IEEE floating-point values #1
Exceptional IEEE floating-point values #2
EXE file type
/EXECUTABLE option (LINK) #1
/EXECUTABLE option (LINK) #2
Executable programs
creating #1
creating #2
effect of optimization level on size
naming
running
See also Program
Execution
interrupting execution of program
example of handling Ctrl/C #1
example of handling Ctrl/C #2
EXIT command (DCL)
EXIT system subroutine
Expanded String Area (ESA)
RMS control structure #1
RMS control structure #2
Explicit interface
and array descriptors
calling non-Fortran subprograms
passing arrays #1
passing arrays #2
passing arrays #3
passing pointers #1
passing pointers #2
passing pointers #3
procedure interface block
See also LRM
types of subprograms
when calling C subprograms
Expressions
parentheses in
maximum allowed
See also LRM
Extended Attributes Block (XAB)
general description of use
initialized after open
kinds of XABs
listing of
EXTENDSIZE specifier
/EXTEND_SOURCE qualifier
Extensions
compatibility with Compaq Fortran 77
See also LRM
External names
case-sensitivity
cDEC$ ALIAS directive #1
cDEC$ ALIAS directive #2
controlling with cDEC$ directives #1
controlling with cDEC$ directives #2
controlling with cDEC$ directives #3
in C
passed between C and HP Fortran #1
passed between C and HP Fortran #2
passed between C and HP Fortran #3
specifying alias names
External procedures
name passing rule
references and optimization
EXTERNAL statement
for C language functions
qualifier controlling compatibility (/NOF77)
See also LRM
when to use for FOR$RAB function
F
F file type
/F77 qualifier
F90 command
See FORTRAN command
F90 file type
FAB
See File Access Block (FAB)
$FABDEF library module
in FORSYSDEF
/FAST qualifier
effect on /ALIGNMENT=COMMONS=keyword #1
effect on /ALIGNMENT=COMMONS=keyword #2
FDML
See Data Manipulation Language (DML)
Feedback on documentation
sending comments to HP
Field descriptors
See LRM
Fields
in common blocks
causes of misalignment
controlling alignment #1
controlling alignment #2
in derived-type data and record structures
causes of misalignment
controlling alignment #1
controlling alignment #2
controlling alignment #3
File Access Block (FAB)
fields for use by USEROPEN
general description
symbol naming conventions
File access, remote
File format
See also Record type; File organization; Formatted data; Unformatted files
File handling #1
File handling #2
examples of
File header characteristics
control block for
XABFHC (RMS)
File name
application of defaults
compiler defaults
I/O statements default use
in I/O statements
OPEN statement specifiers #1
OPEN statement specifiers #2
See also File specifications
using logical names to specify
File organization
available record types
available storage media
default
I/O statement limitations
I/O statements for
obtaining
INQUIRE statement
overview
See also Sequential files; Relative files
stored in file header
File sharing
accessing remote files
OPEN statement, SHARED specifier
RMS file-sharing capability
example
shareable image libraries
File specifications
defining logical names for
general DCL rules (FORTRAN command)
OPEN statement specifiers
use in INQUIRE statement
use in OPEN statements #1
use in OPEN statements #2
use in OPEN statements #3
FILE specifier #1
FILE specifier #2
example
See also LRM
File type
EXE
executable program
F
F90
F90$MOD
FOR
for listing files
for module files
for object files
LIS
OBJ #1
OBJ #2
OLB
OPT
recognized by compiler
STB
TLB
Files
assigning to logical units
default names #1
default names #2
preconnected #1
preconnected #2
summary of methods
using logical name #1
using logical name #2
using logical name #3
using OPEN statement #1
using OPEN statement #2
closing
using RMS
compiler source checking only (no object file) (FORTRAN)
compiler source listing (FORTRAN)
compiling multiple input files (FORTRAN)
controlling include file searching
created by FORTRAN command
created by LINK command #1
created by LINK command #2
external, definition
input to FORTRAN command
input to LINK command
inquiry
internal
naming object file (FORTRAN)
opening #1
opening #2
using RMS
organization and characteristics
preconnected
Compaq Fortran 77 differences
relative organization
RMS journaling
RMS services
list of
scratch
sequential organization
specifying file specification
example program
%FILL
example use
FIND statement
See also LRM
Fixed-length records
data transferred by I/O statements
use for optimal performance
FLOAT function
example use
FLOAT intrinsic function
qualifier controlling size returned
See also LRM
/FLOAT qualifier
D_FLOAT keyword
G_FLOAT keyword
IEEE_FLOAT keyword
Floating-point data types
accuracy-sensitive optimization
Alpha IEEE X_float
arithmetic exception handling #1
arithmetic exception handling #2
array out-of-bounds checking
comparison of VAX and Alpha types
constants
request double precision
controlling size of
COMPLEX declarations
DOUBLE PRECISION declarations
REAL declarations
controlling type in unformatted files
conversion
limitations
converting H_float data
CRAY big endian formats
CVT$CONVERT_FLOAT RTL routine
declarations and qualifiers
declaring
See also LRM
denormal values
differences between Compaq Fortran 77 for OpenVMS VAX Systems and HP Fortran
digits of precision
D_float
differences between VAX and Alpha systems
endian (big and little)
endian order of native formats
exceptional values #1
exceptional values #2
formats used in memory
handling of certain exponentiation expressions
handling of minus zero (IEEE)
handling of single-precision constants
IBM big endian formats
IEEE
big endian formats (conversion)
controlling exceptions (/IEEE_MODE)
denormalized values
native little endian formats
reporting exceptional values
rounding modes
selecting memory format (/FLOAT)
S_float #1
S_float #2
T_float #1
T_float #2
X_float #1
X_float #2
in memory and on disk
infinity
math library used #1
math library used #2
methods of specifying nonnative formats
minus zero use (IEEE)
NaN values
detecting
nonnative formats
normal and denormalized values of native formats
precision
qualifiers controlling size of DOUBLE PRECISION declarations
qualifiers related to accuracy #1
qualifiers related to accuracy #2
qualifiers related to accuracy #3
qualifiers related to accuracy #4
qualifiers related to accuracy #5
qualifiers related to accuracy #6
qualifiers related to accuracy #7
qualifiers related to accuracy #8
qualifiers related to exceptions
ranges #1
ranges #2
ranges #3
reporting exceptional values
reporting exceptions more precisely
reporting underflow messages #1
reporting underflow messages #2
representation of native IEEE and VAX formats
representation of VAX H_float format
representation of zero
rounding modes (IEEE)
selecting memory format
selecting optimal
setting default length (/DOUBLE_SIZE)
setting default length (/REAL_SIZE)
shared memory granularity
underflow run-time checking
values for constants
VAX D_float format #1
VAX D_float format #2
VAX D_float format #3
VAX D_float format #4
VAX F_float format #1
VAX F_float format #2
VAX F_float format #3
VAX F_float format #4
VAX little endian formats
zero values
Flushing data
output record buffering
FMT specifier
See also LRM
FOR$
prefix for condition symbols
for run-time errors
FOR$CONVERT.ext logical name
use with nonnative numeric data
FOR$CONVERTnnn logical name
use with nonnative numeric data
FOR$CONVERT_ext logical name
FOR file type
FOR$IOS
prefix for condition symbols
for run-time errors #1
for run-time errors #2
FOR$RAB function #1
FOR$RAB function #2
Compaq Fortran 77 for OpenVMS VAX Systems compatibility
when to declare EXTERNAL
FORALL statement
array optimizations
See also LRM
$FORDEF library module
in FORSYSDEF #1
in FORSYSDEF #2
$FORIOSDEF library module
in FORSYSDEF #1
in FORSYSDEF #2
FORM specifier #1
FORM specifier #2
FORM specifier #3
See also LRM
Format descriptors
See LRM
Format groups
nesting limits
FORMAT statement
and implied-DO loop collapsing
See also LRM
Formatted data
and DO loop collapsing
and variable format expressions
Compaq Fortran 77 differences
effect on run-time performance
I/O statements for
Formatted I/O statements
Compaq Fortran 77 differences
controlling format mismatch handling
controlling format truncation handling
See also LRM
FORnnn logical name #1
FORnnn logical name #2
FORSYSDEF
$CHFDEF library module #1
$CHFDEF library module #2
condition symbol values
example of including a module
$FABDEF library module
$FORDEF library module #1
$FORDEF library module #2
$FORIOSDEF library module #1
$FORIOSDEF library module #2
$LIBDEF library module
library search order #1
library search order #2
list of library modules
$MTHDEF library module
$NAMDEF library module
overview of library module contents
$RABDEF library module
$SSDEF library module
symbol naming conventions
PARAMETER declarations
use with RMS services #1
use with RMS services #2
FORT$LIBRARY
Fortran
HP Fortran implementation of
PSECT use and attributes
FORTRAN-66
See FORTRAN IV
Fortran 90
Standard
and RECL units for unformatted files
checking (/STANDARD)
Fortran 90/95
condition symbols
See FORSYSDEF
logical names
See Logical names
reusing source file code
See also FORTRAN command; Compatibility; LRM
source file contents
source form
file type
Standard
/ASSUME=DUMMY_ALIASES qualifier #1
/ASSUME=DUMMY_ALIASES qualifier #2
See also LRM
statements
See LRM; appropriate statement name
Fortran 95
Standard
and RECL units for unformatted files
checking (/STANDARD)
FORTRAN command
abbreviating qualifier names and keywords
alignment qualifiers #1
alignment qualifiers #2
and other software components
C language main program
example
comma or plus signs between file names
command qualifiers for efficient run-time performance
consistent use of qualifiers for multiple compilations
controlling arithmetic exception handling
controlling arithmetic exception reporting #1
controlling arithmetic exception reporting #2
creating module files
CXML library for efficient run-time performance
debugging qualifiers
directories searched for module and include files #1
directories searched for module and include files #2
directories searched for text library files
effect of compiler directives on qualifiers #1
effect of compiler directives on qualifiers #2
effect of file type on source form
effect of OPTIONS statement on qualifiers
examples
application with modules
compiling multiple files
for debugging
module subprogram
multiple source files #1
multiple source files #2
naming object files
preventing object file creation
request listing file
requesting additional checking
requesting additional optimizations
requesting Fortran Standard conformance checking
single file
source checking only
using module files #1
using module files #2
file type search order
for efficient run-time performance
for translated shared images
format of
functional groups of qualifiers
multiple source files
effect on optimizations
one or multiple object files per command line #1
one or multiple object files per command line #2
See also Compiler options
specifying
directory for module files
files
include files
input files
library files #1
library files #2
library files #3
library files #4
listing
listing of include file #1
listing of include file #2
listing of include file #3
multiple keywords for a qualifier
object files
output files
source form
summary of qualifiers
using
include files
module files #1
module files #2
multiple FORTRAN commands
Fortran Data Manipulation Language
See Data Manipulation Language (DML)
FORTRAN IV
/F77 qualifier (FORTRAN)
FPSR (floating-point status register)
/FULL qualifier (LINK) #1
/FULL qualifier (LINK) #2
FUNCTION statement
See also LRM
Functions
C language
invoking
declaration statements
%DESCR, %LOC, %REF, and %VAL
example
C language #1
C language #2
C language #3
declaration
interface block in module
with module
with system service
explicit interface
output listing information
return values #1
return values #2
changing default passing mechanisms
passing rules #1
passing rules #2
passing with HP Fortran
with C
with Compaq Fortran 77
See also LRM; Intrinsic procedures
setting return values
using function reference to call system services
F_float data
See Floating-point data types