Developer Reference

  • 2021.1
  • 12/04/2020
  • Public Content
Contents

v?Acospi

Computes the inverse cosine of vector elements divided by
π
.

Syntax

vsAcospi
(
n
,
a
,
y
);
vsAcospiI(n, a, inca, y, incy);
vmsAcospi
(
n
,
a
,
y
,
mode
);
vmsAcospiI(n, a, inca, y, incy, mode);
vdAcospi
(
n
,
a
,
y
);
vdAcospiI(n, a, inca, y, incy);
vmdAcospi
(
n
,
a
,
y
,
mode
);
vmdAcospiI(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
vsAcospi
const float*
for
vmsAcospi
const double*
for
vdAcospi
const double*
for
vmdAcospi
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
vsAcospi
float*
for
vmsAcospi
double*
for
vdAcospi
double*
for
vmdAcospi
Pointer to an array containing the output vector
y
.
Description
The
v?Acospi
function computes the inverse cosine of vector elements divided by
π
. For an argument
x
, the function computes acos(
x
)/
π
.
See Special Value Notations for the conventions used in this table:
Special values for Real Function
v?Acospi(x)
Argument
Result
VM Error Status
Exception
+0
+1/2
-0
+1/2
+1
+0
-1
+1
|
x
| > 1
QNAN
VML_STATUS_ERRDOM
INVALID
+
QNAN
VML_STATUS_ERRDOM
INVALID
-
QNAN
VML_STATUS_ERRDOM
INVALID
QNAN
QNAN
SNAN
QNAN
INVALID

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.