v?Sqrt

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 3/31/2023

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v?Sqrt

Computes a square root of vector elements.

Syntax

vsSqrt( n, a, y );

vsSqrtI(n, a, inca, y, incy);

vmsSqrt( n, a, y, mode );

vmsSqrtI(n, a, inca, y, incy, mode);

vdSqrt( n, a, y );

vdSqrtI(n, a, inca, y, incy);

vmdSqrt( n, a, y, mode );

vmdSqrtI(n, a, inca, y, incy, mode);

vcSqrt( n, a, y );

vcSqrtI(n, a, inca, y, incy);

vmcSqrt( n, a, y, mode );

vmcSqrtI(n, a, inca, y, incy, mode);

vzSqrt( n, a, y );

vzSqrtI(n, a, inca, y, incy);

vmzSqrt( n, a, y, mode );

vmzSqrtI(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 vsSqrt, vmsSqrt const double* for vdSqrt, vmdSqrt const MKL_Complex8* for vcSqrt, vmcSqrt const MKL_Complex16* for vzSqrt, vmzSqrt	Pointer to an array that contains the input vector a.
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 for possible values and their description.

Output Parameters

Name	Type	Description
`y`	float* for vsSqrt, vmsSqrt double* for vdSqrt, vmdSqrt MKL_Complex8* for vcSqrt, vmcSqrt MKL_Complex16* for vzSqrt, vmzSqrt	Pointer to an array that contains the output vector y.

Name

Type

Description

y

float* for vsSqrt, vmsSqrt

double* for vdSqrt, vmdSqrt

MKL_Complex8* for vcSqrt, vmcSqrt

MKL_Complex16* for vzSqrt, vmzSqrt

Pointer to an array that contains the output vector y.

Description

The v?Sqrt function computes a square root of vector elements.

Special Values for Real Function v?Sqrt(x)
Argument	Result	VM Error Status	Exception
X < +0	QNAN	VML_STATUS_ERRDOM	INVALID
+0	+0
-0	-0
-∞	QNAN	VML_STATUS_ERRDOM	INVALID
+∞	+∞
QNAN	QNAN
SNAN	QNAN		INVALID

See Special Value Notations for the conventions used in the table below.

Special Values for Complex Function v?Sqrt(z)
RE(z) i·IM(z)	-∞	-X	-0	+0	+X	+∞	NAN
+i·∞	+∞+i·∞	+∞+i·∞	+∞+i·∞	+∞+i·∞	+∞+i·∞	+∞+i·∞	+∞+i·∞
+i·Y	+0+i·∞					+∞+i·0	QNAN+i·QNAN
+i·0	+0+i·∞		+0+i·0	+0+i·0		+∞+i·0	QNAN+i·QNAN
-i·0	+0-i·∞		+0-i·0	+0-i·0		+∞-i·0	QNAN+i·QNAN
-i·Y	+0-i·∞					+∞-i·0	QNAN+i·QNAN
-i·∞	+∞-i·∞	+∞-i·∞	+∞-i·∞	+∞-i·∞	+∞-i·∞	+∞-i·∞	+∞-i·∞
+i·NAN	QNAN+i·QNAN	QNAN+i·QNAN	QNAN+i·QNAN	QNAN+i·QNAN	QNAN+i·QNAN	+∞+i·QNAN	QNAN+i·QNAN

Notes:

raises INVALID exception when the real or imaginary part of the argument is SNAN
Sqrt(CONJ(z))=CONJ(Sqrt(z)).

Parent topic: Power and Root Functions

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Developer Reference for Intel® oneAPI Math Kernel Library for C

v?Sqrt