DIGITAL Fortran 90
User Manual for
DIGITAL UNIX Systems

T
TASKCOMMON directive #1
TASKCOMMON directive #2
TASKCOMMON directive #3
TASKCOMMON directive #4
-taso option
tclose library routine
Temporary files
created by f90
directory used by f90
retaining with f90
TMPDIR environment variable used by f90
Temporary variables
using PRIVATE clause
Terminating loop execution early
Threaded program execution
alignment requirements
parallel processing #1
parallel processing #2
related command-line options #1
related command-line options #2
requesting #1
requesting #2
requesting #3
VOLATILE statement
THREADPRIVATE directive #1
THREADPRIVATE directive #2
THREADPRIVATE directive #3
THREADPRIVATE directive #4
THREADPRIVATE directive #5
-threads option
Tilde character (~)
in pathname
Time
returning (library routine) #1
returning (library routine) #2
returning (library routine) #3
returning (library routine) #4
returning (library routine) #5
returning (library routine) #6
returning (library routine) #7
returning (library routine) #8
returning (library routine) #9
time library routine
Timing program execution
using routines #1
using routines #2
using routines #3
using shell commands
TMPDIR environment variable
use during compilation #1
use during compilation #2
use with scratch files
topen library routine
-transform_loops option
Transportability
See also Compatibility; Data, converting unformatted files
tread library routine
trewin library routine
tskipf library routine
tstate library routine
ttynam library routine
-tune option #1
-tune option #2
twrite library routine
TYPE specifier
See also LRM
TYPE statement
See also LRM
U
UBOUND intrinsic
umask library routine
Unaligned data
causes
checking for
compiler
derived-type
effect of SEQUENCE statement
error messages
compiler
run-time
See also Alignment
using debugger to locate
-uname option
-uname option (cpp)
Unformatted data
and DO loop collapsing
and I/O statements
and nonnative numeric formats
efficient run-time performance
Unformatted files
converting nonnative data
record type
methods of specifying endian format
obtaining numeric specifying format
specifying format
using command option to specify format
using command option to specify RECL units
using -convert option to specify format
using environment variable method to specify format
using OPEN Statement CONVERT='keyword' method to specify format
using OPTIONS statement /CONVERT to specify format
Unformatted I/O statements
See also LRM
UNIT specifier #1
UNIT specifier #2
UNIT specifier #3
See also LRM
unlink library routine
UNLOCK statement
See also LRM
Unresolved references
-unroll num option #1
-unroll num option #2
unset command (Bourne and Korn shell)
unset command (Bourne and Korn shell)
unsetenv command (C shell)
USE statement #1
USE statement #2
See also LRM
User-defined (derived) type data
causes of unaligned data
options controlling alignment #1
options controlling alignment #2
USEROPEN function
argument passing
example calling program (Fortran 90)
example program (C)
file descriptor requirements
for sockets
routines available to open the file #1
routines available to open the file #2
USEROPEN specifier #1
USEROPEN specifier #2
See also LRM
V
-v option #1
-v option #2
example #1
example #2
Value propagation #1
Value propagation #2
Variable format expression
Variable-length records #1
Variable-length records #2
OpenVMS data compatibility
portability considerations
use for optimal performance
Variables
accessing in debugger
alignment #1
alignment #2
assigned but never used
Fortran complex
See also LRM
treatment as automatic or static
related options #1
related options #2
related options #3
related options #4
used before value assigned
option controlling warning message
Variables declared in other languages, accessing
VAX FORTRAN
See also DIGITAL Fortran 77; VAX systems
VAX systems
converting data to IEEE formats #1
converting data to IEEE formats #2
DIGITAL Fortran 77 (OpenVMS)
extensions not supported
floating-point data comparison
floating-point data conversion guidelines
floating-point data representation
porting floating-point data
floating-point data
COMPLEX
COMPLEX*16
converting #1
converting #2
D_float
F_float
G_float
H_float
representation
options for Fortran compatibility (f90)
-version option
Virtual memory
allocating and freeing (library routine)
-vms option
effect on -align records
effect on other options
VMS systems
See also VAX systems; OpenVMS Fortran
VOLATILE statement
and data-flow and split lifetime analysis
and granularity
and implied-DO loop collapsing
for threaded applications
See also LRM
use with %LOC
when to use