v?Powx

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

v?Powx

vsPowx vdPowx vcPowx vzPowx vmsPowx vmdPowx vmcPowx vmzPowx Computes vector a to the scalar power b .

Syntax

vhPowx ( n , a , b , y ) ;

vhPowxI(n, a, inca, b, y, incy);

vmhPowx ( n , a , b , y , mode ) ;

vmhPowxI(n, a, inca, b, y, incy, mode);

vsPowx ( n , a , b , y ) ;

vsPowxI(n, a, inca, b, y, incy);

vmsPowx ( n , a , b , y , mode ) ;

vmsPowxI(n, a, inca, b, y, incy, mode);

vdPowx ( n , a , b , y ) ;

vdPowxI(n, a, inca, b, y, incy);

vmdPowx ( n , a , b , y , mode ) ;

vmdPowxI(n, a, inca, b, y, incy, mode);

vcPowx ( n , a , b , y ) ;

vcPowxI(n, a, inca, b, y, incy);

vmcPowx ( n , a , b , y , mode ) ;

vmcPowxI(n, a, inca, b, y, incy, mode);

vzPowx ( n , a , b , y ) ;

vzPowxI(n, a, inca, b, y, incy);

vmzPowx ( n , a , b , y , mode ) ;

vmzPowxI(n, a, inca, b, y, incy, mode);

Include Files

mkl.h

Input Parameters

Name	Type	Description
`n`	const MKL_INT	Number of elements to be calculated.
`a`	const _Float16* for `vhPowx` , `vmhPowx` const float* for `vsPowx` , `vmsPowx` const double* for `vdPowx` , `vmdPowx` const MKL_Complex8* for `vcPowx` , `vmcPowx` const MKL_Complex16* for `vzPowx` , `vmzPowx`	Pointer to an array that contains the input vector `a` .
`b`	const _Float16 for `vhPowx` , `vmhPowx` const float for `vsPowx` , `vmsPowx` const double for `vdPowx` , `vmdPowx` const MKL_Complex8 for `vcPowx` , `vmcPowx` const MKL_Complex16 for `vzPowx` , `vmzPowx`	Constant value for power `b` .
`inca` , `incy`	const MKL_INT	Specifies increments for the elements of `a` and `y` .
`mode`	const MKL_INT64	Overrides global VM mode setting for this function call. See vmlSetMode (Sets a new mode for VM functions according to the mode parameter and stores the previous VM mode to oldmode.) for possible values and their description.

Precision Overflow Thresholds for Real v?Powx Function

Data Type	Threshold Limitations on Input Parameters
single precision	`abs(a[i]) < ( FLT_MAX )^{1/b}`
double precision	`abs(a[i]) < ( DBL_MAX )^{1/b}`

Precision overflow thresholds for the complex v?Powx function are beyond the scope of this document.

Output Parameters

Name	Type	Description
`y`	_Float16* for `vhPowx` , `vmhPowx` float* for `vsPowx` , `vmsPowx` double* for `vdPowx` , `vmdPowx` MKL_Complex8* for `vcPowx` , `vmcPowx` MKL_Complex16* for `vzPowx` , `vmzPowx`	Pointer to an array that contains the output vector `y` .

Description

The v?Powx function computes a to the power b for a vector a and a scalar b .

The real function v(s/d)Powx has certain limitations on the input range of a and b parameters. Specifically, if a [i] is positive, then b may be arbitrary. For negative a [i] , the value of b must be an integer (either positive or negative).

The complex function v(c/z)Powx has no input range limitations.

Special values and VM Error Status treatment are the same as for the v?Pow function.

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Developer Reference for Intel® oneAPI Math Kernel Library for C

v?Powx

Syntax

Include Files

Input Parameters

Output Parameters

Description