Developer Reference

  • 0.10
  • 10/21/2020
  • Public Content
Contents

v?Atanpi

Computes the inverse tangent of vector elements divided by
π
.

Syntax

vsAtanpi
(
n
,
a
,
y
);
vsAtanpiI(n, a, inca, y, incy);
vmsAtanpi
(
n
,
a
,
y
,
mode
);
vmsAtanpiI(n, a, inca, y, incy, mode);
vdAtanpi
(
n
,
a
,
y
);
vdAtanpiI(n, a, inca, y, incy);
vmdAtanpi
(
n
,
a
,
y
,
mode
);
vmdAtanpiI(n, a, inca, y, incy, mode);
Include Files
  • mkl.h
Input Parameters
Name
Type
Description
n
const MKL_INT
Specifies the number of elements to be calculated.
a
const float*
for
vsAtanpi
const float*
for
vmsAtanpi
const double*
for
vdAtanpi
const double*
for
vmdAtanpi
Pointer to the array containing the input vector
a
.
inca
,
incy
const MKL_INT
Specifies increments for the elements of
a
and
y
.
mode
const MKL_INT64
Overrides the global VM
mode
setting for this function call. See
vmlSetMode
for possible values and their description.
Output Parameters
Name
Type
Description
y
float*
for
vsAtanpi
float*
for
vmsAtanpi
double*
for
vdAtanpi
double*
for
vmdAtanpi
Pointer to an array containing the output vector
y
.
Description
The
v?Atanpi
function computes the inverse tangent of vector elements divided by
π
. For an argument
x
, the function computes atan(
x
)/
π
.
Special values for Real Function
v?Atanpi(x)
Argument
Result
VM Error Status
Exception
+0
+0
-0
-0
+
+1/2
-
-1/2
QNAN
QNAN
SNAN
QNAN
INVALID

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