p?lared1d

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

p?lared1d

Redistributes an array assuming that the input array, bycol , is distributed across rows and that all process columns contain the same copy of bycol .

Syntax

voidpslared1d ( MKL_INT*n , MKL_INT*ia , MKL_INT*ja , MKL_INT*desc , float*bycol , float*byall , float*work , MKL_INT*lwork );

voidpdlared1d ( MKL_INT*n , MKL_INT*ia , MKL_INT*ja , MKL_INT*desc , double*bycol , double*byall , double*work , MKL_INT*lwork );

Include Files

mkl_scalapack.h

Description

pslared1d pdlared1d The p?lared1d routine function redistributes a 1D array. It assumes that the input array bycol is distributed across rows and that all process column contain the same copy of bycol . The output array byall is identical on all processes and contains the entire array.

Input Parameters

np = Number of local rows in bycol ()

n

(global)

The number of elements to be redistributed. n≥ 0 .

ia , ja

(global) ia , ja must be equal to 1.

desc

(local) array of size 9. A 2D array descriptor, which describes bycol .

bycol

(local). REAL for pslared1d DOUBLE PRECISION for pdlared1d COMPLEX for pclared1d COMPLEX*16 for pzlared1d . Distributed block cyclic array of global size n and of local size np . bycol is distributed across the process rows. All process columns are assumed to contain the same value.

work

(local). REAL for pslared1d DOUBLE PRECISION for pdlared1d COMPLEX for pclared1d COMPLEX*16 for pzlared1d . size lwork . Used to hold the buffers sent from one process to another.

lwork

(local)

The size of the work array. lwork ≥ numroc(n, desc(nb_)desc[nb_], 0, 0, npcol) .

Output Parameters

byall

(global).

DOUBLE PRECISION for pdlared1d COMPLEX for pclared1d COMPLEX*16 for pzlared1d . Global size n , local size n . byall is exactly duplicated on all processes. It contains the same values as bycol , but it is replicated across all processes rather than being distributed.

NOTE:

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Developer Reference for Intel® oneAPI Math Kernel Library for C

p?lared1d

Syntax

Include Files

Description

Input Parameters

Output Parameters