DIGITAL Fortran 90
User Manual for
DIGITAL UNIX Systems

K
-k option (cpp) #1
-k option (cpp) #2
KAP preprocessor
improving run-time performance
kill library routine
Kind type parameter
COMPLEX declarations
INTEGER declarations
LOGICAL declarations
REAL declarations
See also LRM
Korn shell (ksh)
FORTn environment variables
process limits
setting and unsetting environment variables
L
-l option #1
-l option #2
Labels
in computed or assigned GOTO list
maximum allowed
See also LRM
Ladebug debugger
-ladebug option #1
-ladebug option #2
for Ladebug
Language compatibility
See Compatibility
Language dialects
DIGITAL Fortran compatibility information
options for #1
options for #2
options for #3
Language extensions
compatibility with DIGITAL Fortran 77 for DIGITAL UNIX systems
compatibility with DIGITAL Fortran 77 for OpenVMS systems
compatibility with DIGITAL Fortran 90 on other platforms
compatibility with DIGITAL Visual Fortran
DIGITAL Fortran 90 on other platforms (summary)
See also LRM
Language interface
C and DIGITAL Fortran 90
allowing C programs to use DIGITAL Fortran 90 RTL
appending underscore for external names
C language main program #1
C language main program #2
calling subroutines
changing default argument passing mechanisms #1
changing default argument passing mechanisms #2
changing default mechanisms
character arguments
complex arguments
handling arrays
handling common blocks
integer arguments
invoking a C function from DIGITAL Fortran 90
invoking a DIGITAL Fortran 90 subprogram from C
library routines for
null-terminating character arguments
opening file with user-supplied function
passing arguments between #1
passing arguments between #2
passing arguments between #1
passing arguments between #2
USEROPEN function
using C conventions
using f90 command
DIGITAL Fortran 77 and DIGITAL Fortran 90
alignment options
common block values
data types to avoid
example
function values
I/O compatibility
mechanisms
passing arguments
passing target or pointer data
pointer data
similarities
DIGITAL Fortran 90
argument passing rules
changing default argument passing mechanisms #1
changing default argument passing mechanisms #2
default argument passing mechanism
descriptor format
explicit interface
passing arguments #1
passing arguments #2
passing arrays
passing character arguments
passing pointers
external names
controlling with cDEC$ directives #1
controlling with cDEC$ directives #2
controlling with cDEC$ directives #3
USEROPEN function
LASTLOCAL option
for PARALLEL DO directive #1
for PARALLEL DO directive #2
for PDO directive #1
for PDO directive #2
LASTPRIVATE clause
for DO directive #1
for DO directive #2
for DO directive #3
for PARALLEL DO directive #1
for PARALLEL DO directive #2
for PARALLEL SECTIONS directive #1
for PARALLEL SECTIONS directive #2
for SECTIONS directive #1
for SECTIONS directive #2
for SECTIONS directive #3
ld linker
creating shared object libraries
effect of EXTERNAL statement
f90 command options for
functions performed
libraries passed to ld by f90 command
locating undefined symbols using nm command
messages #1
messages #2
option to prevent running ld
options and files passed by f90
options for
relationship to f90 command #1
relationship to f90 command #2
relationship to f90 command #3
relationship to f90 command #4
request threaded run-time library #1
request threaded run-time library #2
restrictions creating shared libraries
routines with opposition settings
sample use with f90 command #1
sample use with f90 command #2
sample use with f90 command #3
specifying object libraries
specifying shared object libraries
-ldir option #1
-ldir option #2
.LE. operator
See also LRM
LEN specifier
See also LRM
Length
DOUBLE PRECISION declarations
options controlling size
INTEGER or LOGICAL declarations
options controlling size
REAL or COMPLEX declarations
options controlling size
Lexical tokens per statement
maximum
Library
linker searching options
list passed by f90 command to ld
list searched automatically by f90 command
obtaining information about
recognized file name suffixes
See also Shared library; Archive library
selecting archive or shared for linking (f90 options) #1
selecting archive or shared for linking (f90 options) #2
specifying with f90 command
types of
Library routines
accessing reference pages for
bessel #1
bessel #2
bit manipulation
directories and files
equivalent intrinsic functions
error handling
example program #1
example program #2
EXTERNAL statement
for arithmetic exception handling
for C main language program
for timing program execution
HPF_LIBRARY
See LRM
HPF_LOCAL_LIBRARY
I/O
language interface
overview of 3f procedures available
parallel execution
random numbers
return data and time
return error function
return file descriptor
return process, system, or command-line information
shared memory
signals and processes
summary
thread locking
using intrinsic procedures instead of
virtual memory allocation
Line length
fixed-format source
extending
free-format source
See LRM
link library routine
Linker and library searching
See ld linker
LINPACK benchmark
List-directed I/O statements
See also LRM
Listing file
See also Source code listing
lnblnk library routine
loc library routine
LOCAL option
for PARALLEL directive
for PARALLEL DO directive
for PARALLEL SECTIONS directive
for PDO directive #1
for PDO directive #2
for PSECTIONS directive
for SINGLE PROCESS directive
local_to_global library routine
Lock routines
Locks
for dependences
using CRITICAL directive
Logical data type
converting nonnative data
declarations and options #1
declarations and options #2
declaring
See also LRM
differences with nonnative formats
options controlling size of LOGICAL declarations
ranges
representation
Logical I/O unit
implicit system defaults
INQUIRE statement
OPEN statement options
See also LRM
summary
system unit numbers and names
Logical operators
use in debugging
long library routine
Loop control variable
and implied-DO loop collapsing
Loops
alignment
and register use
blocking optimization #1
blocking optimization #2
controlling number of times unrolled
decomposition
distribution
distribution optimization #1
distribution optimization #2
efficient coding suggestions #1
efficient coding suggestions #2
efficient coding suggestions #3
efficient coding suggestions #4
fusion optimization #1
fusion optimization #2
interchange optimization #1
interchange optimization #2
limiting loop unrolling #1
limiting loop unrolling #2
loop transformation optimizations
optimizations for #1
optimizations for #2
optimizations for #3
outer loop unrolling optimization #1
outer loop unrolling optimization #2
relationship to basic block size
scalar replacement optimization #1
scalar replacement optimization #2
See also DO loops; Optimization
software pipelining optimization #1
software pipelining optimization #2
software pipelining optimization #3
software pipelining optimization #4
terminating execution early
transformation optimizations #1
transformation optimizations #2
transformation optimizations #3
transformation optimizations #4
transformation optimizations #5
unroll optimization
Lowercase names
case-sensitivity
options controlling
LRM
The acronym LRM in this index refers to the DIGITAL Fortran Language Reference Manual
lshift function
lstat library routine
-lstring option #1
-lstring option #2
and creating shared libraries
.LT. operator
See also LRM
ltime library routine