p?lasrt

Developer Reference for Intel® oneAPI Math Kernel Library for C

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ID 766684

Date 4/28/2026

Version

Public

p?lasrt

Sorts the numbers in an array and the corresponding vectors in increasing order.

Syntax

void pslasrt ( constchar*id , constMKL_INT*n , float*d , constfloat*q , constMKL_INT*iq , constMKL_INT*jq , constMKL_INT*descq , float*work , constMKL_INT*lwork , MKL_INT*iwork , constMKL_INT*liwork , MKL_INT*info );

void pdlasrt ( constchar*id , constMKL_INT*n , double*d , constdouble*q , constMKL_INT*iq , constMKL_INT*jq , constMKL_INT*descq , double*work , constMKL_INT*lwork , MKL_INT*iwork , constMKL_INT*liwork , MKL_INT*info );

Include Files

mkl_scalapack.h

Description

p?lasrt sorts the numbers in d and the corresponding vectors in q in increasing order.

Input Parameters

id

(global) CHARACTER*1. = ‘I’: sort d in increasing order; = ‘D’: sort d in decreasing order. (NOT IMPLEMENTED YET)

n

(global) INTEGER. The number of columns to be operated on i.e the number of columns of the distributed submatrix sub( Q ). n >= 0.

d

(global) REAL for pslasrt DOUBLE PRECISION for pdlasrt Array, size ( n )

q

(local) REAL for pslasrt DOUBLE PRECISION for pdlasrt

Pointer into the local memory to an array of size (lld_q,LOCc(jq+n-1))lld_q * LOCc ( jq + n -1) .

This array contains the local pieces of the distributed matrix sub( A ) to be copied from.

iq

(global) INTEGER. The row index in the global array A indicating the first row of sub( Q ).

jq

(global) INTEGER. The column index in the global array A indicating the first column of sub( Q ).

descq

(global and local) INTEGER. Array of size dlen_ . The array descriptor for the distributed matrix A .

work

(local) REAL for pslasrt DOUBLE PRECISION for pdlasrt Array, size ( lwork )

lwork

(local) INTEGER. The size of the array work . lwork = MAX( n , NP * ( NB + NQ )), where NP = numroc ( n , NB, MYROW, IAROW, NPROW ), NQ = numroc ( n , NB, MYCOL, DESCQ( csrc_ ), NPCOL ). numroc is a ScaLAPACK tool function.

iwork

(local) INTEGER. Array, size ( liwork )

liwork

(local) INTEGER. The size of the array iwork . liwork = n + 2*NB + 2*NPCOL

Output Parameters

d: On exit, the numbers in d are sorted in increasing order.
info: (global) INTEGER. = 0: successful exit < 0: If the i -th argument is an array and the j -th entry had an illegal value, then info = -( i *100+ j ), if the i -th argument is a scalar and had an illegal value, then info = - i .

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Developer Reference for Intel® oneAPI Math Kernel Library for C

p?lasrt

Syntax

Include Files

Description

Input Parameters

Output Parameters