Compaq Fortran
User Manual for
Tru64 UNIX and
Linux Alpha Systems

1
-1 option
3
3f routine
3hpf routine
6
-66 option
A
a.out file #1
a.out file #2
specifying different name for
abort library routine
Absolute pathname
abstract_to_physical library routine
ACCEPT statement
See also Language Reference Manual
access library routine
Access mode
Access modes
direct
limitations by file organization and record type
OPEN statement specifiers
requirement for direct access to sequential files
sequential
ACCESS specifier #1
ACCESS specifier #2
See also Language Reference Manual
Accuracy
and dummy aliases
and numerical data I/O
-assume noaccuracy_sensitive option
floating-point constants
-fpconstant option
-fprm keyword options
-fp_reorder option
hoisting divide operations
-intconstant option
integer constants
-math_library fast option
rounding during calculations
when converting OpenVMS Fortran unformatted data
ACTION specifier
See also Language Reference Manual
Actual arguments
Adjusting the run-time parallel environment
ADVANCE specifier #1
ADVANCE specifier #2
See also Language Reference Manual
Advancing I/O
Affine subscripts
AIMAG intrinsic function
options controlling size returned
See also Language Reference Manual
alarm library routine
ALIAS directive
See cDEC$ ALIAS directive
-align all option
-align commons option #1
-align commons option #2
-align dcommons option #1
-align dcommons option #2
effect of -fast option
-align nocommons option
-align none option
-align norecords option #1
-align norecords option #2
-align recnbyte option
-align records option
effect of -vms option
-align sequence option #1
-align sequence option #2
Alignment
argument passing
Compaq Fortran and C structures
array elements
cDEC$ directives and -align options
checking for unaligned data #1
checking for unaligned data #2
common block data
derived-type data
effect of declaration statements
effect of -vms option
locating unaligned data (debugger)
loop
of data types
options controlling
common block data #1
common block data #2
common block data #3
common block data #4
derived-type data #1
derived-type data #2
record structures #1
record structures #2
warnings for unaligned data
record structures
SEQUENCE statement
effect on derived-type data
unaligned data
causes
checking for
effect on performance #1
effect on performance #2
locating in debugger
options #1
options #2
ordering data declarations
warning messages for #1
warning messages for #2
Allocating and freeing virtual memory (library routine)
Alpha processor generation
specifying to compiler #1
specifying to compiler #2
specifying to compiler #3
Alternate entry points
-altparam option
and function
-annotations all option
-annotations code option
-annotations detail option
-annotations feedback option
-annotations inlining option
-annotations keyword option
-annotations loop_transforms option
-annotations loop_unrolling option
-annotations none option
-annotations prefetching option
-annotations shrinkwrapping option
-annotations software_pipelining option
-annotations tail_calls option
-annotations tail_recursion option
APPEND specifier
See also Language Reference Manual
ar command
-arch host option
effect of -fast option
-arch option #1
-arch option #2
Archive library
creating and maintaining
linker searching options
list searched by f90 command
nonshared optimizations
obtaining information about
recognized file name suffix
specifying with f90
Argument passing
alignment of data passed
C and Compaq Fortran #1
C and Compaq Fortran #2
C and Compaq Fortran #3
alignment of structures
arrays
cDEC$ ATTRIBUTES C directive
changing default mechanisms #1
changing default mechanisms #2
changing default mechanisms #3
character data
character data example
character null terminator
common block values
complex data example
data types
examples #1
examples #2
examples #3
examples #4
integer data example
passing arrays
pointer data #1
pointer data #2
structures
using C conventions
checking for mismatches at compile-time
checking for temporary arguments at run-time
Compaq Fortran
array temporary creation
arrays
by address (%LOC)
by reference (%REF)
by value (%VAL)
changing default mechanisms #1
changing default mechanisms #2
characters
default passing mechanism
descriptor format
explicit interface
hidden length #1
hidden length #2
hidden length #3
hidden length #4
implicit interface #1
implicit interface #2
omitted arguments (extra comma)
pointers
rules #1
rules #2
Compaq Fortran 77 and Compaq Fortran
alignment options
common block values
data type sizes
data types to avoid
differences
example
function values #1
function values #2
I/O compatibility
mechanisms
passing target or pointer data
pointer data
similarities
using Compaq Fortran 77 features
efficient array use
from USEROPEN function and Compaq Fortran RTL
when temporary array copy is created
Arguments
actual
differences between Compaq Fortran 77 and Compaq Fortran
dummy
aliasing and accuracy
and implied-DO loop collapsing
option for aliasing
maximum allowed in CALL statement
maximum allowed in function reference
See also Argument passing; Language Reference Manual
Arithmetic exception handling
controlling floating-point exceptions
controlling reporting
-check nopower option
-check underflow option
-fpe options
-speculate option
-synchronous_exceptions option
debugger handling
defaults and applicable options
effect of speculative execution optimization
effect of using fast math library routines
example program
exceptional events
exceptional values
floating-point data #1
floating-point data #2
-check nopower option
-check underflow option
-fpe options
-synchronous_exceptions option
floating-point exceptional values
floating-point exceptions
floating-point underflow #1
floating-point underflow #2
floating-point underflow #3
floating-point underflow #4
forcing core dump at run time
FP_CLASS intrinsic #1
FP_CLASS intrinsic #2
FP_CLASS intrinsic #3
IEEE NaN values (quiet and signaling)
infinity values
integer overflow
ISNAN intrinsic #1
ISNAN intrinsic #2
options for
See also Data types; Ranges
signals
caught by Compaq Fortran RTL
definition
handling in debugger #1
handling in debugger #2
handling in debugger #3
Arithmetic operators
for efficient run-time performance
Array dimension
Arrays
alignment
allocatable
arguments #1
arguments #2
arguments #3
Compaq Fortran and Compaq Fortran 77 similarities
example #1
example #2
example #3
example #4
example #5
See also Language Reference Manual
array sections
viewing in debugger
assumed-shape #1
assumed-shape #2
assumed-size
bounds checking
character
arguments passed with hidden length
column-major order
conformable
declaring
See Language Reference Manual
differences between Compaq Fortran and C
dimension limits
efficient array syntax in I/O list #1
efficient array syntax in I/O list #2
efficient combinations of input and output arguments
element sequence association
explicit-shape
explicit-shape arguments
example (C and Compaq Fortran)
example (Compaq Fortran 77 and Compaq Fortran)
expression syntax for debugger
HPF_LOCAL_LIBRARY routines
natural storage order
nesting limits
optimizations #1
optimizations #2
passed by descriptor
passing as arguments
example
pointers to
row-major order
See also Argument passing; Language Reference Manual
sorting
library routines for
syntax for run-time efficiency
temporary creation of
using efficiently
when temporary copy is created for argument passing #1
when temporary copy is created for argument passing #2
writing for efficiency
zero-sized
Assembler file
creating
passed to cc or ccc
ASSOCIATEVARIABLE specifier #1
ASSOCIATEVARIABLE specifier #2
See also Language Reference Manual
Association
host
procedure interface
use
procedure interface block #1
procedure interface block #2
-assume accuracy_sensitive option
-assume bigarrays option
effect of -fast option
-assume buffered_io option
-assume byterecl option
-assume cc_omp option
-assume dummy_aliases option #1
-assume dummy_aliases option #2
-assume dummy_aliases option #3
-assume gfullpath option
-assume minus0 option
-assume no2underscores option
-assume noaccuracy_sensitive option
effect of -fast option
-assume nogfullpath option
-assume nominus0 option
-assume noprotect_constants option
-assume nopthreads_lock option
-assume nosource_include option
-assume nounderscore option
-assume nozsize option
effect of -fast option
-assume protect_constants option
-assume pthreads_lock option
-assume source_include option
Atom toolkit
ATOMIC directive #1
ATOMIC directive #2
ATTRIBUTES directives
See cDEC$ ATTRIBUTES directives
Automatic inlining
-automatic option #1
-automatic option #2
effect on -recursive
B
BACKSPACE statement #1
BACKSPACE statement #2
Balancing the workload
manual optimization
SCHEDULE clause
BARRIER directive #1
BARRIER directive #2
BARRIER directive #3
BARRIER directive #4
bash shell
fortn environment variables
process limits
setting and unsetting environment variables
Basic block
Basic block counting
Basic linear algebra routines (Compaq Extended Math Library)
besj0 function
besj1 function
besjn function
bessel function
Bessel functions
library routines (3f)
besy0 function
besy1 function
besyn function
Big endian storage
Binding of parallel compiler directives
rules checking
bit function
Bit manipulation procedures
intrinsic functions and 3f routines
See also Language Reference Manual
BLANK specifier
effect of -vms option
See also Language Reference Manual
BLAS routines (Compaq Extended Math Library)
Block IF statement
nesting limit
BLOCKED option
for PDO directive
BLOCKSIZE specifier #1
BLOCKSIZE specifier #2
See also Language Reference Manual
Bottleneck
reduction of I/O
Bourne Again shell
See bash shell
Bourne shell (sh)
fortn environment variables
Bourne shell (sh)
process limits
Bourne shell (sh)
setting and unsetting environment variables
Breakpoint
BUFFERCOUNT specifier #1
BUFFERCOUNT specifier #2
See also Language Reference Manual
Buffered output
Buffers
for record I/O
Built-in functions (%LOC, %REF, %VAL)
See also Language Reference Manual; cDEC$ ATTRIBUTES
BWX extension
Byte/Word manipulation instruction extension
C
c$CHUNK directive
C compiler
c$COPYIN directive
c$DOACROSS directive
C language
appending underscore for external names
C main program
-nofor_main option
calling between Compaq Fortran and C #1
calling between Compaq Fortran and C #2
calling between Compaq Fortran and C #3
example function called by Compaq Fortran #1
example function called by Compaq Fortran #2
function to open file (USEROPEN)
See also cc command; cpp preprocessor; Language interfaces
c$MPSCHEDULE directive
-c option #1
-c option #2
-c option #3
and creating shared libraries
effect of -o option
example #1
example #2
c$ prefix
C shell (csh)
process limits
setting and unsetting environment variables
Cache size
Call graph
CALL statement
maximum arguments allowed
See also Language Reference Manual
Calling interface
See Argument passing; Language interface
Calling other language programs
-call_shared option #1
-call_shared option #2
Carriage control
effect of -vms option
CARRIAGECONTROL specifier #1
CARRIAGECONTROL specifier #2
CARRIAGECONTROL specifier #3
effect of -ccdefault option
effect of -vms option
See also Language Reference Manual
Case sensitive
external names in C
controlling with cDEC$ directives #1
controlling with cDEC$ directives #2
file name differences with OpenVMS Fortran
file names (OPEN statement)
names
in the debugger
options controlling
Case sensitivity #1
Case sensitivity #2
cc command
options and files passed by f90
options available from f90 command
using f90 command with
ccc command
options available from f90 command
using fort command with
-ccdefault option
cDEC$ ALIAS directive
cDEC$ ATTRIBUTES
ALIAS directive
C directive
example
EXTERN directive
REFERENCE directive
STDCALL directive
VALUE directive
VARYING directive
cDEC$ directives #1
cDEC$ directives #2
cDEC$ directives #3
Cell
in relative organization files
CHAR intrinsic procedure
using to null-terminate a C string
CHARACTER
data type
representation
declaration
See Language Reference Manual
Character arguments
passing between Compaq Fortran and C
example
null terminator
passing from USEROPEN function and Compaq Fortran RTL
Character bounds checking
Character data
using whole character string operations for run-time efficiency
Character I/O
library routines
Character set
See Language Reference Manual
chdir library routine
-check arg_temp_created option
-check bounds option
-check noformat option
effect of -vms option
-check nooutput_conversion option
effect of -vms option
-check nopower option
-check omp_bindings option
-check overflow option
-check underflow option
chmod library routine
Chunk
CHUNK directive #1
CHUNK directive #2
CHUNK option
for PDO directive
Chunk size
specifying a default
CIX extension
CLOSE statement #1
CLOSE statement #2
See also Language Reference Manual
CMPLX intrinsic function
options controlling size returned
See also Language Reference Manual
Code hoisting
in divide operations
in optimization
Code instruction generation, for specific Alpha processors
Code motion
Code replication
Coding restrictions
-col72 option
Column-major order
Combined parallel/worksharing constructs
Compaq Fortran parallel
defined
OpenMP
Command line arguments
returning (library routine) #1
returning (library routine) #2
Comment lines
-d_lines option
See also Language Reference Manual
Common blocks
accessing variables in the debugger
alignment of data in
causes of unalignment
named
maximum allowed
options controlling alignment #1
options controlling alignment #2
options controlling alignment #3
order of data in
See also Language Reference Manual
sharing across processes
COMMON statement
and data flow and split lifetime analysis
causes of unalignment
data alignment #1
data alignment #2
options controlling alignment
See also Language Reference Manual
Common subexpression elimination
Compaq Extended Math Library (CXML)
example program
groups of routines
INCLUDE statement
linking
types of libraries provided
Compaq Fortran
array temporary creation
for OpenVMS systems
comparison of floating-point data types
compatibility #1
compatibility #2
data porting
equivalent record types
extensions not supported #1
extensions not supported #2
options for VAX compatibility (f90)
record type compatibility
VAX floating-point data types
online release notes
contents of
displaying
other platforms
language compatibility (summary)
record type portability
version number
displaying
obtaining from listing
obtaining from object file
Compaq Fortran 77
for Compaq Tru64 UNIX systems
argument passing
calling between Compaq Fortran
compatibility
compiler diagnostic detection differences
I/O to same unit number
language features not supported
mixed language example
passing aligned data
passing common block values
passing pointers
passing same size data
Compaq Fortran directives
Compaq Fortran parallel directives
BARRIER #1
BARRIER #2
CHUNK #1
CHUNK #2
COPYIN
CRITICAL SECTION #1
CRITICAL SECTION #2
DOACROSS #1
DOACROSS #2
END CRITICAL SECTION #1
END CRITICAL SECTION #2
END PARALLEL
END PARALLEL DO
END PARALLEL SECTIONS #1
END PARALLEL SECTIONS #2
END PDO #1
END PDO #2
END PSECTIONS #1
END PSECTIONS #2
END SINGLE PROCESS #1
END SINGLE PROCESS #2
format
INSTANCE
INSTANCE PARALLEL #1
INSTANCE PARALLEL #2
INSTANCE PARALLEL #3
INSTANCE SINGLE
MP_SCHEDTYPE #1
MP_SCHEDTYPE #2
PARALLEL
PARALLEL DO #1
PARALLEL DO #2
PARALLEL SECTIONS #1
PARALLEL SECTIONS #2
PDO #1
PDO #2
PDONE #1
PDONE #2
prefixes
fixed source form
free source form
PSECTIONS #1
PSECTIONS #2
SECTION #1
SECTION #2
See also OpenMP parallel directives
SINGLE PROCESS #1
SINGLE PROCESS #2
summary descriptions
TASKCOMMON #1
TASKCOMMON #2
TASKCOMMON #3
Compaq FUSE
-fuse_xref option
Compaq Math Libraries Web site
Compaq MPI #1
Compaq MPI #2
Compaq Visual Fortran, language compatibility with
Compatibility
with Compaq Fortran 77 for Compaq Tru64 UNIX systems
language features
with Compaq Fortran for OpenVMS systems
converting data #1
converting data #2
porting data
record types
with Compaq Fortran on other platforms
with Compaq Visual Fortran
Compilation control
Compile-time operations #1
Compile-time operations #2
Compiler
and linker #1
and linker #2
coding restrictions summary of
data format assumptions
default file names #1
default file names #2
default file names #3
driver
messages
program
driver program
effect of optimization level on compilation time
effect of optimizations on program size
functions
limits
messages issued by
general description
output listing summary section
passes
options for displaying
process file descriptor limit
process stack size
request threaded run-time execution #1
request threaded run-time execution #2
See also f90 command
specifying directory for temporary files
using latest version for run-time efficiency
Compiler directives
and OPTIONS statement
See also Language Reference Manual; Directives; cDEC$
Compiler options
See f90 command
Compiling C language programs
examples #1
examples #2
examples #3
file name suffix
use with f90
use with fort
Compiling, linking, and running parallelized programs
Complex data types #1
Complex data types #2
declarations and options #1
declarations and options #2
native IEEE representation
ranges
See also Language Reference Manual
VAX representation
COMPLEX declarations
options to control size of
Complex variables
Fortran
Condition symbols, Fortran
summary of
Conditional compilation
defining preprocessor symbols
OpenMP
undefining preprocessor symbols
Conditional operators
use in debugging
Conformable array
Connection
to logical I/O units by system default
Constant pooling
Constants
declaration
See Language Reference Manual
floating-point
double precision
integer
maximum size
ranges
Construct
combined parallel/worksharing
Compaq Fortran parallel
defined
OpenMP
synchronization
Compaq Fortran parallel
OpenMP
worksharing
Compaq Fortran parallel
OpenMP
CONTAINS statement
See also Language Reference Manual
Continuation lines
column placement
See Language Reference Manual
maximum allowed
Controlling data scope attributes #1
Controlling data scope attributes #2
Controlling the data environment #1
Controlling the data environment #2
-convert big_endian option #1
-convert big_endian option #2
-convert big_endian option #3
-convert cray option #1
-convert cray option #2
-convert cray option #3
-convert fdx option #1
-convert fdx option #2
-convert fgx option #1
-convert fgx option #2
-convert ibm option #1
-convert ibm option #2
-convert ibm option #3
-convert little_endian option #1
-convert little_endian option #2
-convert little_endian option #3
-convert native option #1
-convert native option #2
-convert native option #3
CONVERT specifier #1
CONVERT specifier #2
See also Language Reference Manual
-convert vaxd option #1
-convert vaxd option #2
-convert vaxd option #3
-convert vaxg option #1
-convert vaxg option #2
-convert vaxg option #3
COPYIN clause
for PARALLEL directive #1
for PARALLEL directive #2
for PARALLEL DO directive #1
for PARALLEL DO directive #2
for PARALLEL SECTIONS directive #1
for PARALLEL SECTIONS directive #2
COPYIN directive
COPYIN option
for PARALLEL directive
for PARALLEL DO directive
for PARALLEL SECTIONS directive
cord
related commands and f90 options
related f90 options #1
related f90 options #2
-cord option #1
-cord option #2
with -feedback option #1
with -feedback option #2
Core file
for severe errors #1
for severe errors #2
signals
Count extension
Counted loop
-cpp option
effect of -p option
cpp preprocessor
compilation process
effects of .f and .f90 file name suffixes
f90 command
macros defined
options for #1
options for #2
options for #3
retaining temporary files
searching for include files #1
searching for include files #2
undefining macros
create system call
using to open file
CRITICAL directive #1
CRITICAL directive #2
CRITICAL directive #3
CRITICAL directive #4
using for locks
Critical section
CRITICAL SECTION directive #1
CRITICAL SECTION directive #2
Cross-reference file
Compaq FUSE
ctime library routine
CXML
See Compaq Extended Math Library