p?laevswp

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

Download PDF

ID 766686

Date 4/28/2026

Version

Public

p?laevswp

Moves the eigenvectors from where they are computed to ScaLAPACK standard block cyclic array.

Syntax

call pslaevswp ( n , zin , ldzi , z , iz , jz , descz , nvs , key , rwork , lrwork )

call pdlaevswp ( n , zin , ldzi , z , iz , jz , descz , nvs , key , rwork , lrwork )

call pclaevswp ( n , zin , ldzi , z , iz , jz , descz , nvs , key , rwork , lrwork )

call pzlaevswp ( n , zin , ldzi , z , iz , jz , descz , nvs , key , rwork , lrwork )

Include Files

mkl_scalapack.h

Description

pslaevswp pdlaevswp pclaevswp pzlaevswp The p?laevswp routine function moves the eigenvectors (potentially unsorted) from where they are computed, to a ScaLAPACK standard block cyclic array, sorted so that the corresponding eigenvalues are sorted.

Input Parameters

np = the number of rows local to a given process.

nq = the number of columns local to a given process.

n

(global) INTEGER .

The order of the matrix A . n ≥ 0.

zin

(local). REAL for pslaevswp DOUBLE PRECISION for pdlaevswp COMPLEX for pclaevswp COMPLEX*16 for pzlaevswp .

Array of size ( ldzi , nvs ( iam +2) ) . The eigenvectors on input. iam is a process rank from [0, nprocs ) interval. Each eigenvector resides entirely in one process. Each process holds a contiguous set of nvs ( iam +2) eigenvectors. The global number of the first eigenvector that the process holds is: ((sum for i =[ 1, iam +1 ] of nvs ( i ) )+1).

ldzi

(local)

INTEGER . The leading dimension of the zin array.

iz , jz

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

descz

(global and local) INTEGER

Array of size dlen_ . The array descriptor for the distributed matrix Z.

nvs

(global) INTEGER .

Array of size nprocs +1

nvs ( i ) = number of eigenvectors held by processes [0, i -1)

nvs (1) = number of eigenvectors held by processes [0, 1 -1) = 0

nvs ( nprocs +1)= number of eigenvectors held by processes [0, nprocs )= total number of eigenvectors .

key

(global) INTEGER .

Array of size n . Indicates the actual index (after sorting) for each of the eigenvectors.

rwork

(local). REAL for pslaevswp DOUBLE PRECISION for pdlaevswp COMPLEX for pclaevswp COMPLEX*16 for pzlaevswp . Array of size lrwork .

lrwork

(local)

INTEGER . Size of work.

Output Parameters

z

(local). REAL for pslaevswp DOUBLE PRECISION for pdlaevswp COMPLEX for pclaevswp COMPLEX*16 for pzlaevswp .

Array of global size n by n and of local size ( lld_z , nq ) . The eigenvectors on output. The eigenvectors are distributed in a block cyclic manner in both dimensions, with a block size of nb .

NOTE:

Overview

Select Your Language

Using Intel.com Search

Quick Links

Recent Searches

Advanced Search

Only search in

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

p?laevswp

Syntax

Include Files

Description

Input Parameters

Output Parameters