Developer Reference

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

Powx

Raises each element of a vector to a constant power.

Syntax

IppStatus ippsPowx_32f_A11 (const Ipp32f*
pSrc1
, const Ipp32f
ConstValue
, Ipp32f*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_32f_A21 (const Ipp32f*
pSrc1
, const Ipp32f
ConstValue
, Ipp32f*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_32f_A24 (const Ipp32f*
pSrc1
, const Ipp32f
ConstValue
, Ipp32f*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_64f_A26 (const Ipp64f*
pSrc1
, const Ipp64f
ConstValue
, Ipp64f*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_64f_A50 (const Ipp64f*
pSrc1
, const Ipp64f
ConstValue
, Ipp64f*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_64f_A53 (const Ipp64f*
pSrc1
, const Ipp64f
ConstValue
, Ipp64f*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_32fc_A11 (const Ipp32fc*
pSrc1
, const Ipp32fc
ConstValue
, Ipp32fc*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_32fc_A21 (const Ipp32fc*
pSrc1
, const Ipp32fc
ConstValue
, Ipp32fc*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_32fc_A24 (const Ipp32fc*
pSrc1
, const Ipp32fc
ConstValue
, Ipp32fc*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_64fc_A26 (const Ipp64fc*
pSrc1
, const Ipp64fc
ConstValue
, Ipp64fc*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_64fc_A50 (const Ipp64fc*
pSrc1
, const Ipp64fc
ConstValue
, Ipp64fc*
pDst
, Ipp32s
len
);
IppStatus ippsPowx_64fc_A53 (const Ipp64fc*
pSrc1
, const Ipp64fc
ConstValue
, Ipp64fc*
pDst
, Ipp32s
len
);
Include Files
ippvm.h
Domain Dependencies
Headers:
ippcore.h
Libraries:
ippcore.lib
Parameters
pSrc1
Pointer to the source vector.
ConstValue
Constant value.
pDst
Pointer to the destination vector.
len
Number of elements in the vectors.
Description
This function
raises each element of the vector
pSrc1
to the constant power
ConstValue
and stores the result in the corresponding element of
pDst
.
For single precision data:
function flavors
ippsPowx_32f_A11
and
ippsPowx_32cf_A11
guarantee 11 correctly rounded bits of significand, or at least 3 exact decimal digits;
function flavors
ippsPowx_32f_A21
and
ippsPowx_32fc_A21
guarantee 21 correctly rounded bits of significand, or 4 ulps, or about 6 exact decimal digits;
function flavors
ippsPowx_32f_A24
and
ippsPowx_32fc_A24
guarantee 24 correctly rounded bits of significand, including the implied bit, with the maximum guaranteed error within 1 ulp.
For double precision data:
function flavors
ippsPowx_64f_A26
and
ippsPowx_64fc_A26
guarantee 26 correctly rounded bits of significand, or 6.7E+7 ulps, or approximately 8 exact decimal digits;
function flavors
ippsPowx_64f_A50
and
ippsPowx_64fc_A50
guarantee 50 correctly rounded bits of significand, or 4 ulps, or approximately 15 exact decimal digits;
function flavors
ippsPowx_64f_A53
and
ippsPowx_64fc_A53
guarantee 53 correctly rounded bits of significand, including the implied bit, with the maximum guaranteed error within 1 ulp.
Note that for
ippsPowx
complex functions there may be argument ranges where the accuracy specification does not hold.
The computation is performed as follows:
pDst
[n] = (
pSrc
[n])
ConstValue
,
0 ≤ n <
len
.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error when
pSrc1
or
pDst
pointer is
NULL
.
ippStsSizeErr
Indicates an error when
len
is less than or equal to 0.
ippStsDomain
In real functions, indicates a warning that the argument is out of the function domain, that is, at least one pair of the elements meets the following condition: element of
pSrc1
is finite, less than 0, and
ConstValue
is finite, non-integer.
IppStsSingularity
In real functions, indicates a warning that the argument is the singularity point, that is, at least one pair of the elements is as follows: element of
pSrc1
is equal to 0, and
ConstValue
is integer and less than 0.

Example

The example below shows how to use the function
ippsPowx
.
IppStatus ippsPowx_32f_A21_sample(void)
{
const Ipp32f x1[4] = {0.483, 0.565, 0.776, 0.252};
const Ipp32f x2 = 0.823;
Ipp32f y[4];
IppStatus st = ippsPowx_32f_A21( x1, x2, y, 4 );
printf(" ippsPowx_32f_A21:\n");
printf(" x1 = %.3f %.3f %.3f %.3f \n", x1[0], x1[1], x1[2], x1[3]);
printf(" x2 = %.3f \n", x2);
printf(" y = %.3f %.3f %.3f %.3f \n", y[0], y[1], y[2], y[3]);
return st;
}
Output results:
ippsPowx_32f_A21:
x1 = 0.483 0.565 0.776 0.252
x2 = 0.823
y = 0.549 0.568 0.901 0.386

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