p?laevswp

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 10/15/2026

Version

Public

p?laevswp

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

Syntax

void pslaevswp(MKL_INT *n, float *zin, MKL_INT *ldzi, float *z, MKL_INT *iz, MKL_INT *jz,
               MKL_INT *descz, MKL_INT *nvs, MKL_INT *key, float *work, MKL_INT *lwork);

void pdlaevswp(MKL_INT *n, double *zin, MKL_INT *ldzi, double *z, MKL_INT *iz,
               MKL_INT *jz, MKL_INT *descz, MKL_INT *nvs, MKL_INT *key, double *work,
               MKL_INT *lwork);

void pclaevswp(MKL_INT *n, float *zin, MKL_INT *ldzi, MKL_Complex8 *z, MKL_INT *iz,
               MKL_INT *jz, MKL_INT *descz, MKL_INT *nvs, MKL_INT *key, float *rwork,
               MKL_INT *lrwork);

void pzlaevswp(MKL_INT *n, double *zin, MKL_INT *ldzi, MKL_Complex16 *z, MKL_INT *iz,
               MKL_INT *jz, MKL_INT *descz, MKL_INT *nvs, MKL_INT *key, double *rwork,
               MKL_INT *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)

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 +1] . 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 +1] eigenvectors. The global number of the first eigenvector that the process holds is: ((sum for i =[ 0, iam ] of nvs [ i ] )+1).

ldzi

(local)

The leading dimension of the zin array.

iz , jz

(global) 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)

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

nvs

(global)

Array of size nprocs +1

nvs [ i ] = number of eigenvectors held by processes [0, i )

nvs [0] = number of eigenvectors held by processes [0, 0) = 0

nvs [ nprocs ]= number of eigenvectors held by [0, nprocs )= total number of eigenvectors .

key

(global)

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)

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 * 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:

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Developer Reference for Intel® oneAPI Math Kernel Library for C

p?laevswp

Syntax

Include Files

Description

Input Parameters

Output Parameters