IEEE_NEXT_AFTER(3I) Last changed: 1-6-98
IEEE_NEXT_AFTER - Returns the next representable neighbor of x in the
direction toward y
IEEE_NEXT_AFTER ([X=]x, [Y=]y)
UNICOS/mk and IRIX systems
CRAY T90 systems that support IEEE floating-point arithmetic
CF90 and MIPSpro 7 Fortran 90 compiler extension to Fortran 90
IEEE Standard for Binary Floating-point Arithmetic
The IEEE_NEXT_AFTER intrinsic function returns the next representable
neighbor of x in the direction toward y.
IEEE_NEXT_AFTER and the Fortran 90 intrinsic function NEAREST(3I) have
a number of differences, including the Fortran 90 restriction that
argument s to NEAREST(3I) must not be zero.
IEEE_NEXT_AFTER accepts the following arguments:
x Must be of type real.
y Must be of type real. If x is scalar, y must be scalar. If
x is an array, y can be scalar or an array of the same shape
as x.
IEEE_NEXT_AFTER is an elemental function. The name of this intrinsic
cannot be passed as an argument.
The IEEE intrinsic procedures use the named constants contained in a
system module, so you must include one of the following statements in
your program:
* On UNICOS and UNICOS/mk systems: USE CRI_IEEE_DEFINITIONS
* On UNICOS, UNICOS/mk, and IRIX systems: USE FTN_IEEE_DEFINITIONS
The CRI_IEEE_DEFINITIONS module is obsolescent. It will be removed
for the CF90 4.0 release.
The result type and type parameter is the same type and type parameter
as x. If x is an array, the result is an array of the same shape as
x.
The following special cases can affect the result value:
* If x = = y, the result is x without any exception being signaled.
* If either x or y is a quiet NaN, the result is one or the other of
the input NaNs.
* Overflow is signaled when x is finite but IEEE_NEXT_AFTER(x, y) is
infinite. Underflow is signaled when IEEE_NEXT_AFTER(x, y) lies
strictly between
-2**E and +2**E .
min min
In both cases, the inexact exception is signaled.
The result values are produced from the following combinations of
scalar and array arguments:
* If x is scalar, the result is a scalar.
* If x is an array and y is scalar, the result is an array in which
each element is the nearest neighbor of x
i
in the direction of y.
* If x is an array and y is an array, the result is an array in which
each element is the nearest neighbor of
x in the direction of y .
i i REAL x, y
... ! Compute X.
y = IEEE_NEXT_AFTER(x, 1.0)
NEAREST(3I)
Intrinsic Procedures Reference Manual, publication SR-2138, for the
printed version of this man page.
IEEE_NEXT_AFTER(3I) Last changed: 1-6-98
IEEE_NEXT_AFTER - Returns the next representable neighbor of x in the
direction toward y
IEEE_NEXT_AFTER ([X=]x, [Y=]y)
UNICOS/mk and IRIX systems
CRAY T90 systems that support IEEE floating-point arithmetic
CF90 and MIPSpro 7 Fortran 90 compiler extension to Fortran 90
IEEE Standard for Binary Floating-point Arithmetic
The IEEE_NEXT_AFTER intrinsic function returns the next representable
neighbor of x in the direction toward y.
IEEE_NEXT_AFTER and the Fortran 90 intrinsic function NEAREST(3I) have
a number of differences, including the Fortran 90 restriction that
argument s to NEAREST(3I) must not be zero.
IEEE_NEXT_AFTER accepts the following arguments:
x Must be of type real.
y Must be of type real. If x is scalar, y must be scalar. If
x is an array, y can be scalar or an array of the same shape
as x.
IEEE_NEXT_AFTER is an elemental function. The name of this intrinsic
cannot be passed as an argument.
The IEEE intrinsic procedures use the named constants contained in a
system module, so you must include one of the following statements in
your program:
* On UNICOS and UNICOS/mk systems: USE CRI_IEEE_DEFINITIONS
* On UNICOS, UNICOS/mk, and IRIX systems: USE FTN_IEEE_DEFINITIONS
The CRI_IEEE_DEFINITIONS module is obsolescent. It will be removed
for the CF90 4.0 release.
The result type and type parameter is the same type and type parameter
as x. If x is an array, the result is an array of the same shape as
x.
The following special cases can affect the result value:
* If x = = y, the result is x without any exception being signaled.
* If either x or y is a quiet NaN, the result is one or the other of
the input NaNs.
* Overflow is signaled when x is finite but IEEE_NEXT_AFTER(x, y) is
infinite. Underflow is signaled when IEEE_NEXT_AFTER(x, y) lies
strictly between
-2**E and +2**E .
min min
In both cases, the inexact exception is signaled.
The result values are produced from the following combinations of
scalar and array arguments:
* If x is scalar, the result is a scalar.
* If x is an array and y is scalar, the result is an array in which
each element is the nearest neighbor of x
i
in the direction of y.
* If x is an array and y is an array, the result is an array in which
each element is the nearest neighbor of
x in the direction of y .
i i REAL x, y
... ! Compute X.
y = IEEE_NEXT_AFTER(x, 1.0)
NEAREST(3I)
Intrinsic Procedures Reference Manual, publication SR-2138, for the
printed version of this man page.
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