intrinsic.texi (PRODUCT, [...]): New.

2007-04-27  Daniel Franke  <franke.daniel@gmail.com>

	* intrinsic.texi (PRODUCT, RESHAPE, SPACING, SPREAD, SUM, 
	SYSTEM_CLOCK, TRANSFER, UNPACK): New.
	(DATE_AND_TIME, CPU_TIME, RRSPACING): Added cross references.

From-SVN: r124222
This commit is contained in:
Daniel Franke 2007-04-27 12:20:12 -04:00 committed by Daniel Franke
parent 4af96f9f61
commit 1c6ab44ef7
2 changed files with 238 additions and 26 deletions

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@ -1,3 +1,9 @@
2007-04-27 Daniel Franke <franke.daniel@gmail.com>
* intrinsic.texi (PRODUCT, RESHAPE, SPACING, SPREAD, SUM,
SYSTEM_CLOCK, TRANSFER, UNPACK): New.
(DATE_AND_TIME, CPU_TIME, RRSPACING): Added cross references.
2007-04-26 Daniel Franke <franke.daniel@gmail.com>
* intrinsic.texi (NULL, PACK, PRESENT, REPEAT, SCAN, SHAPE,

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@ -2369,6 +2369,9 @@ program test_cpu_time
print '("Time = ",f6.3," seconds.")',finish-start
end program test_cpu_time
@end smallexample
@item @emph{See also}:
@ref{SYSTEM_CLOCK}, @ref{DATE_AND_TIME}
@end table
@ -2548,6 +2551,9 @@ program test_time_and_date
print '(8i5))', values
end program test_time_and_date
@end smallexample
@item @emph{See also}:
@ref{CPU_TIME}, @ref{SYSTEM_CLOCK}
@end table
@ -7562,12 +7568,13 @@ END PROGRAM
@node PRODUCT
@section @code{PRODUCT} --- Product of array elements
@cindex @code{PRODUCT} intrinsic
@cindex undocumented intrinsic
Intrinsic implemented, documentation pending.
@cindex array operation
@table @asis
@item @emph{Description}:
Multiplies the elements of @var{ARRAY} along dimension @var{DIM} if
the corresponding element in @var{MASK} is @code{TRUE}.
@item @emph{Standard}:
F95 and later
@ -7575,10 +7582,38 @@ F95 and later
Transformational function
@item @emph{Syntax}:
@code{RESULT = PRODUCT(ARRAY[, MASK])}
@code{RESULT = PRODUCT(ARRAY, DIM[, MASK])}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{ARRAY} @tab Shall be an array of type @code{INTEGER(*)},
@code{REAL(*)} or @code{COMPLEX(*)}.
@item @var{DIM} @tab (Optional) shall be a scalar of type
@code{INTEGER} with a value in the range from 1 to n, where n
equals the rank of @var{ARRAY}.
@item @var{MASK} @tab (Optional) shall be of type @code{LOGICAL}
and either be a scalar or an array of the same shape as @var{ARRAY}.
@end multitable
@item @emph{Return value}:
The result is of the same type as @var{ARRAY}.
If @var{DIM} is absent, a scalar with the product of all elements in
@var{ARRAY} is returned. Otherwise, an array of rank n-1, where n equals
the rank of @var{ARRAY}, and a shape similar to that of @var{ARRAY} with
dimension @var{DIM} dropped is returned.
@item @emph{Example}:
@item @emph{Specific names}:
@smallexample
PROGRAM test_product
INTEGER :: x(5) = (/ 1, 2, 3, 4 ,5 /)
print *, PRODUCT(x) ! all elements, product = 120
print *, PRODUCT(x, MASK=MOD(x, 2)==1) ! odd elements, product = 15
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{SUM}
@end table
@ -7990,10 +8025,12 @@ end program
@cindex @code{RESHAPE} intrinsic
@cindex array manipulation
Intrinsic implemented, documentation pending.
@table @asis
@item @emph{Description}:
Reshapes @var{SOURCE} to correspond to @var{SHAPE}. If necessary,
the new array may be padded with elements from @var{PAD} or permuted
as defined by @var{ORDER}.
@item @emph{Standard}:
F95 and later
@ -8001,11 +8038,37 @@ F95 and later
Transformational function
@item @emph{Syntax}:
@code{RESULT = RESHAPE(SOURCE, SHAPE[, PAD, ORDER])}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{SOURCE} @tab Shall be an array of any type.
@item @var{SHAPE} @tab Shall be of type @code{INTEGER} and an
array of rank one. Its values must be positive or zero.
@item @var{PAD} @tab (Optional) shall be an array of the same
type as @var{SOURCE}.
@item @var{ORDER} @tab (Optional) shall be of type @code{INTEGER}
and an array of the same shape as @var{SHAPE}. Its values shall
be a permutation of the numbers from 1 to n, where n is the size of
@var{SHAPE}. If @var{ORDER} is absent, the natural ordering shall
be assumed.
@end multitable
@item @emph{Return value}:
The result is an array of shape @var{SHAPE} with the same type as
@var{SOURCE}.
@item @emph{Example}:
@smallexample
PROGRAM test_reshape
INTEGER, DIMENSION(4) :: x
WRITE(*,*) SHAPE(x) ! prints "4"
WRITE(*,*) SHAPE(RESHAPE(x, (/2, 2/))) ! prints "2 2"
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{SHAPE}, @ref{SIZE}
@ref{SHAPE}
@end table
@ -8038,6 +8101,8 @@ The return value is of the same type and kind as @var{X}.
The value returned is equal to
@code{ABS(FRACTION(X)) * FLOAT(RADIX(X))**DIGITS(X)}.
@item @emph{See also}:
@ref{SPACING}
@end table
@ -8444,7 +8509,7 @@ arrays must be allocated.
@item @emph{Return value}:
An @code{INTEGER} array of rank one with as many elements as @var{SOURCE}
has dimensions. The elements of the resulting array correspond to the extent
has dimensions. The elements of the resulting array correspond to the extend
of @var{SOURCE} along the respective dimensions. If @var{SOURCE} is a scalar,
the result is the rank one array of size zero.
@ -8789,12 +8854,12 @@ The return value is of type default @code{REAL}.
@node SPACING
@section @code{SPACING} --- Smallest distance between two numbers of a given type
@cindex @code{SPACING} intrinsic
@cindex undocumented intrinsic
Intrinsic implemented, documentation pending.
@table @asis
@item @emph{Description}:
Determines the distance between the argument @var{X} and the nearest
adjacent number of the same type.
@item @emph{Standard}:
F95 and later
@ -8802,10 +8867,29 @@ F95 and later
Elemental function
@item @emph{Syntax}:
@code{RESULT = SPACING(X)}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{X} @tab Shall be of type @code{REAL(*)}.
@end multitable
@item @emph{Return value}:
The result is of the same type as the input argument @var{X}.
@item @emph{Example}:
@smallexample
PROGRAM test_spacing
INTEGER, PARAMETER :: SGL = SELECTED_REAL_KIND(p=6, r=37)
INTEGER, PARAMETER :: DBL = SELECTED_REAL_KIND(p=13, r=200)
WRITE(*,*) spacing(1.0_SGL) ! "1.1920929E-07" on i686
WRITE(*,*) spacing(1.0_DBL) ! "2.220446049250313E-016" on i686
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{RRSPACING}
@end table
@ -8815,10 +8899,11 @@ Elemental function
@cindex @code{SPREAD} intrinsic
@cindex array manipulation
Intrinsic implemented, documentation pending.
@table @asis
@item @emph{Description}:
Replicates a @var{SOURCE} array @var{NCOPIES} times along a specified
dimension @var{DIM}.
@item @emph{Standard}:
F95 and later
@ -8826,10 +8911,32 @@ F95 and later
Transformational function
@item @emph{Syntax}:
@code{RESULT = SPREAD(SOURCE, DIM, NCOPIES)}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{SOURCE} @tab Shall be a scalar or an array of any type and
a rank less than seven.
@item @var{DIM} @tab Shall be a scalar of type @code{INTEGER} with a
value in the range from 1 to n+1, where n equals the rank of @var{SOURCE}.
@item @var{NCOPIES} @tab Shall be a scalar of type @code{INTEGER}.
@end multitable
@item @emph{Return value}:
The result is an array of the same type as @var{SOURCE} and has rank n+1
where n equals the rank of @var{SOURCE}.
@item @emph{Example}:
@smallexample
PROGRAM test_spread
INTEGER :: a = 1, b(2) = (/ 1, 2 /)
WRITE(*,*) SPREAD(A, 1, 2) ! "1 1"
WRITE(*,*) SPREAD(B, 1, 2) ! "1 1 2 2"
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{UNPACK}
@end table
@ -9019,12 +9126,13 @@ To stat an open file: @ref{FSTAT}, to stat a link: @ref{LSTAT}
@node SUM
@section @code{SUM} --- Sum of array elements
@cindex @code{SUM} intrinsic
@cindex array manipulation
Intrinsic implemented, documentation pending.
@cindex array operation
@table @asis
@item @emph{Description}:
Adds the elements of @var{ARRAY} along dimension @var{DIM} if
the corresponding element in @var{MASK} is @code{TRUE}.
@item @emph{Standard}:
F95 and later
@ -9032,9 +9140,37 @@ F95 and later
Transformational function
@item @emph{Syntax}:
@code{RESULT = SUM(ARRAY[, MASK])}
@code{RESULT = SUM(ARRAY, DIM[, MASK])}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{ARRAY} @tab Shall be an array of type @code{INTEGER(*)},
@code{REAL(*)} or @code{COMPLEX(*)}.
@item @var{DIM} @tab (Optional) shall be a scalar of type
@code{INTEGER} with a value in the range from 1 to n, where n
equals the rank of @var{ARRAY}.
@item @var{MASK} @tab (Optional) shall be of type @code{LOGICAL}
and either be a scalar or an array of the same shape as @var{ARRAY}.
@end multitable
@item @emph{Return value}:
The result is of the same type as @var{ARRAY}.
If @var{DIM} is absent, a scalar with the sum of all elements in @var{ARRAY}
is returned. Otherwise, an array of rank n-1, where n equals the rank of
@var{ARRAY},and a shape similar to that of @var{ARRAY} with dimension @var{DIM}
dropped is returned.
@item @emph{Example}:
@smallexample
PROGRAM test_sum
INTEGER :: x(5) = (/ 1, 2, 3, 4 ,5 /)
print *, SUM(x) ! all elements, sum = 15
print *, SUM(x, MASK=MOD(x, 2)==1) ! odd elements, sum = 9
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{PRODUCT}
@end table
@ -9129,10 +9265,17 @@ Subroutine, non-elemental function
@cindex time, current
@cindex current time
Intrinsic implemented, documentation pending.
@table @asis
@item @emph{Description}:
Determines the @var{COUNT} of milliseconds of wall clock time since
the Epoch (00:00:00 UTC, January 1, 1970) modulo @var{COUNT_MAX},
@var{COUNT_RATE} determines the number of clock ticks per second.
@var{COUNT_RATE} and @var{COUNT_MAX} are constant and specific to
@command{gfortran}.
If there is no clock, @var{COUNT} is set to @code{-HUGE(COUNT)}, and
@var{COUNT_RATE} and @var{COUNT_MAX} are set to zero
@item @emph{Standard}:
F95 and later
@ -9140,10 +9283,30 @@ F95 and later
Subroutine
@item @emph{Syntax}:
@code{CALL SYSTEM_CLOCK([COUNT, COUNT_RATE, COUNT_MAX])}
@item @emph{Arguments}:
@item @emph{Return value}:
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{COUNT} @tab (Optional) shall be a scalar of type default
@code{INTEGER} with @code{INTENT(OUT)}.
@item @var{COUNT_RATE} @tab (Optional) shall be a scalar of type default
@code{INTEGER} with @code{INTENT(OUT)}.
@item @var{COUNT_MAX} @tab (Optional) shall be a scalar of type default
@code{INTEGER} with @code{INTENT(OUT)}.
@end multitable
@item @emph{Example}:
@smallexample
PROGRAM test_system_clock
INTEGER :: count, count_rate, count_max
CALL SYSTEM_CLOCK(count, count_rate, count_max)
WRITE(*,*) count, count_rate, count_max
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{DATE_AND_TIME}, @ref{CPU_TIME}
@end table
@ -9360,12 +9523,15 @@ See @code{HUGE} for an example.
@node TRANSFER
@section @code{TRANSFER} --- Transfer bit patterns
@cindex @code{TRANSFER} intrinsic
@cindex bit operations
Intrinsic implemented, documentation pending.
@cindex type cast
@table @asis
@item @emph{Description}:
Interprets the bit pattern of @var{SOURCE} as a variable of the
same type and type parameters as @var{MOLD}.
This is also known as @emph{casting} one type to another.
@item @emph{Standard}:
F95 and later
@ -9373,10 +9539,27 @@ F95 and later
Transformational function
@item @emph{Syntax}:
@code{RESULT = TRANSFER(SOURCE, MOLD[, SIZE])}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{SOURCE} @tab Shall be a scalar or an array of any type.
@item @var{MOLD} @tab Shall be a scalar or an array of any type.
@item @var{SIZE} @tab (Optional) shall be a scalar and of type
@code{INTEGER}.
@end multitable
@item @emph{Return value}:
The result has the same type as @var{MOLD} with the bit level
representation of @var{SOURCE}.
@item @emph{Example}:
@item @emph{See also}:
@smallexample
PROGRAM test_transfer
integer :: x = 2143289344
print *, transfer(x, 1.0) ! prints "NaN" on i686
END PROGRAM
@end smallexample
@end table
@ -9612,10 +9795,10 @@ Subroutine, non-elemental function
@cindex @code{UNPACK} intrinsic
@cindex array manipulation
Intrinsic implemented, documentation pending.
@table @asis
@item @emph{Description}:
Store the elements of @var{VECTOR} in an array of higher rank.
@item @emph{Standard}:
F95 and later
@ -9623,12 +9806,35 @@ F95 and later
Transformational function
@item @emph{Syntax}:
@code{RESULT = UNPACK(VECTOR, MASK, FIELD)}
@item @emph{Arguments}:
@multitable @columnfractions .15 .70
@item @var{VECTOR} @tab Shall be an array of any type and rank one. It
shall have at least as many elements as @var{MASK} has @code{TRUE} values.
@item @var{MASK} @tab Shall be an array of type @code{LOGICAL}.
@item @var{FIELD} @tab Shall be of the sam type as @var{VECTOR} and have
the same shape as @var{MASK}.
@end multitable
@item @emph{Return value}:
The resulting array corresponds to @var{FIELD} with @code{TRUE} elements
of @var{MASK} replaced by values from @var{VECTOR} in array element order.
@item @emph{Example}:
@smallexample
PROGRAM test_unpack
integer :: vector(2) = (/1,1/)
logical :: mask(2,2) = (/ .TRUE., .FALSE., .FALSE., .TRUE. /)
integer :: field(2,2) = 0, unity(2,2)
! result: unity matrix
unity = unpack(vector, reshape(mask, (/2,2/), field)
END PROGRAM
@end smallexample
@item @emph{See also}:
@ref{PACK}
@ref{PACK}, @ref{SPREAD}
@end table