p?copy

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 3/31/2023

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p?copy

Copies one distributed vector to another vector.

Syntax

call pscopy(n, x, ix, jx, descx, incx, y, iy, jy, descy, incy)

call pdcopy(n, x, ix, jx, descx, incx, y, iy, jy, descy, incy)

call pccopy(n, x, ix, jx, descx, incx, y, iy, jy, descy, incy)

call pzcopy(n, x, ix, jx, descx, incx, y, iy, jy, descy, incy)

call picopy(n, x, ix, jx, descx, incx, y, iy, jy, descy, incy)

Include Files

mkl_pblas.h

Description

The p?copy routines perform a copy operation with distributed vectors defined as

sub(y) = sub(x),

where sub(x) and sub(y) are n-element distributed vectors.

sub(x) denotes X(ix, jx:jx+n-1) if incx=m_x, and X(ix: ix+n-1, jx) if incx= 1;

sub(y) denotes Y(iy, jy:jy+n-1) if incy=m_y, and Y(iy: iy+n-1, jy) if incy= 1.

Input Parameters

n

(global) INTEGER. The length of distributed vectors, n≥0.

x

(local) REAL for pscopy

DOUBLE PRECISION for pdcopy

COMPLEX for pccopy

DOUBLE COMPLEX for pzcopy

INTEGER for picopy

Array, size (jx-1)*m_x + ix+(n-1)*abs(incx)).

This array contains the entries of the distributed vector sub(x).

ix, jx

(global) INTEGER. The row and column indices in the distributed matrix X indicating the first row and the first column of the submatrix sub(X), respectively.

descx

(global and local) INTEGER array of dimension 9. The array descriptor of the distributed matrix X.

incx

(global) INTEGER. Specifies the increment for the elements of sub(x). Only two values are supported, namely 1 and m_x. incx must not be zero.

y

(local) REAL for pscopy

DOUBLE PRECISION for pdcopy

COMPLEX for pccopy

DOUBLE COMPLEX for pzcopy

INTEGER for picopy

Array, size (jy-1)*m_y + iy+(n-1)*abs(incy)).

This array contains the entries of the distributed vector sub(y).

iy, jy

(global) INTEGER. The row and column indices in the distributed matrix Y indicating the first row and the first column of the submatrix sub(Y), respectively.

descy

(global and local) INTEGER array of dimension 9. The array descriptor of the distributed matrix Y.

incy

(global) INTEGER. Specifies the increment for the elements of sub(y). Only two values are supported, namely 1 and m_y. incy must not be zero.

Output Parameters

y: Overwritten with the distributed vector sub(x).

Parent topic: PBLAS Level 1 Routines

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

p?copy