Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 7/13/2023
Public

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Document Table of Contents

v?CopySign

Returns vector of elements of one argument with signs changed to match other argument elements.

Syntax

call vscopysign (n, a, y)

call vscopysigni(n, a, inca, b, incb, y, incy)

call vmscopysign (n, a, y, mode)

call vmscopysigni(n, a, inca, b, incb, y, incy, mode)

call vdcopysign (n, a, y)

call vdcopysigni(n, a, inca, b, incb, y, incy)

call vmdcopysign (n, a, y, mode)

call vmdcopysigni(n, a, inca, b, incb, y, incy, mode)

Include Files

  • mkl_vml.f90

Input Parameters

Name

Type

Description

n

INTEGER

Specifies the number of elements to be calculated.

a

REAL for vscopysign

REAL for vmscopysign

DOUBLE PRECISION for vdcopysign

DOUBLE PRECISION for vmdcopysign

Pointer to the array containing the input vector a.

inca, incb, incy

INTEGER, INTENT(IN)

Specifies increments for the elements of a, b, and y.

mode

INTEGER (KIND=8)

Overrides the global VM mode setting for this function call. See vmlSetMode for possible values and their description.

Output Parameters

Name

Type

Description

y

REAL for vscopysign

REAL for vmscopysign

DOUBLE PRECISION for vdcopysign

DOUBLE PRECISION for vmdcopysign

Pointer to an array containing the output vector y.

Description

The v?CopySign function returns the first vector argument elements with the sign changed to match the sign of the second vector argument's corresponding elements.