v?Powr
v?Powr
Computes
a
to the power b
for elements of two vectors, where the elements of vector argument a
are all non-negative.Syntax
vsPowr
(
n
,
a
,
b
,
y
);
vsPowrI(n, a, inca, b, incb, y, incy);
vmsPowr
(
n
,
a
,
b
,
y
,
mode
);
vmsPowrI(n, a, inca, b, incb, y, incy, mode);
vdPowr
(
n
,
a
,
b
,
y
);
vdPowrI(n, a, inca, b, incb, y, incy);
vmdPowr
(
n
,
a
,
b
,
y
,
mode
);
vmdPowrI(n, a, inca, b, incb, 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, b | const float* for vsPowr const float* for vmsPowr const double* for vdPowr const double* for vmdPowr | Pointers to arrays containing the input vectors a and b . |
inca , incb , incy | const MKL_INT | Specifies increments for the elements of a , b , 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 vsPowr float* for vmsPowr double* for vdPowr double* for vmdPowr | Pointer to an array containing the output vector y . |
Description
The
v?Powr
function raises each element of vector a
by the corresponding element of vector b
. The elements of a
are all nonnegative (a
i
≥
0).Data Type | Threshold Limitations on Input Parameters |
|---|---|
single precision | a i 1/ b i |
double precision | a i 1/ b i |
Special values and VM Error Status treatment for
v?Powr
function are the same as for v?Pow
, unless otherwise indicated in this table:Argument 1 | Argument 2 | Result | VM Error Status | Exception |
|---|---|---|---|---|
x < 0 | any value y | NAN | VML_STATUS_ERRDOM | INVALID |
0 < x < ∞ | ± 0 | 1 | ||
± 0 | - ∞ < y < 0 | + ∞ | ||
± 0 | - ∞ | + ∞ | ||
± 0 | y > 0 | +0 | ||
1 | - ∞ < y < ∞ | 1 | ||
± 0 | ± 0 | NAN | ||
+ ∞ | ± 0 | NAN | ||
1 | + ∞ | NAN | ||
x ≥ 0 | NAN | NAN | ||
NAN | any value y | NAN | ||
0 < x <1 | - ∞ | + ∞ | ||
x > 1 | - ∞ | +0 | ||
0 ≤ x < 1 | + ∞ | +0 | ||
x > 1 | + ∞ | + ∞ | ||
+ ∞ | x < +0 | +0 | ||
+ ∞ | x > +0 | + ∞ | ||
QNAN | QNAN | QNAN | VML_STATUS_ERRDOM | |
QNAN | SNAN | QNAN | VML_STATUS_ERRDOM | INVALID |
SNAN | QNAN | QNAN | VML_STATUS_ERRDOM | INVALID |
SNAN | SNAN | QNAN | VML_STATUS_ERRDOM | INVALID |