Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

v?NextAfter

Returns vector of elements containing the next representable floating-point values following the values from the elements of one vector in the direction of the corresponding elements of another vector.

Syntax

call vsnextafter
(
n
,
a
,
b
,
y
)
call vsnextafteri(n, a, inca, b, incb, y, incy)
call vmsnextafter
(
n
,
a
,
b
,
y
,
mode
)
call vmsnextafteri(n, a, inca, b, incb, y, incy, mode)
call vdnextafter
(
n
,
a
,
b
,
y
)
call vdnextafteri(n, a, inca, b, incb, y, incy)
call vmdnextafter
(
n
,
a
,
b
,
y
,
mode
)
call vmdnextafteri(n, a, inca, b, incb, y, incy, mode)
Include Files
  • mkl_vml.f90
Input Parameters
Name
Type
Description
n
INTEGER
Specifies the number of elements to be calculated.
a
,
b
REAL
for
vsnextafter
REAL
for
vmsnextafter
DOUBLE PRECISION
for
vdnextafter
DOUBLE PRECISION
for
vmdnextafter
Pointers to the arrays containing the input vectors
a
and
b
.
inca
,
incb
,
incy
INTEGER, INTENT(IN)
Specifies increments for the elements of
a
,
b
, and
y
.
mode
INTEGER (KIND=8)
Overrides the global VM
mode
setting for this function call. See
vmlSetMode
for possible values and their description.
Output Parameters
Name
Type
Description
y
REAL
for
vsnextafter
REAL
for
vmsnextafter
DOUBLE PRECISION
for
vdnextafter
DOUBLE PRECISION
for
vmdnextafterjjssd
Pointer to an array containing the output vector
y
.
Description
The
v?NextAfter
function returns a vector containing the next representable floating-point values following the first vector argument elements in the direction of the second vector argument's corresponding elements.
Special cases:
Overflow
The function raises overflow and inexact floating-point exceptions and sets
VML_STATUS_OVERFLOW
if an input vector argument element is finite and the corresponding result vector element value is infinite.
Underflow
The function raises underflow and inexact floating-point exceptions and sets
VML_STATUS_UNDERFLOW
if a result vector element value is subnormal or zero, and different from the corresponding input vector argument element.
Even though underflow or overflow can occur, the returned value is independent of the current rounding direction mode.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804