Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

p?lasrt

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

Syntax

void pslasrt
(
const
char*
id
,
const
MKL_INT*
n
,
float*
d
,
const
float*
q
,
const
MKL_INT*
iq
,
const
MKL_INT*
jq
,
const
MKL_INT*
descq
,
float*
work
,
const
MKL_INT*
lwork
,
MKL_INT*
iwork
,
const
MKL_INT*
liwork
,
MKL_INT*
info
);
void pdlasrt
(
const
char*
id
,
const
MKL_INT*
n
,
double*
d
,
const
double*
q
,
const
MKL_INT*
iq
,
const
MKL_INT*
jq
,
const
MKL_INT*
descq
,
double*
work
,
const
MKL_INT*
lwork
,
MKL_INT*
iwork
,
const
MKL_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)
= 'I': sort
d
 in increasing order;
= 'D': sort
d
 in decreasing order. (NOT IMPLEMENTED YET)
n
(global)
The number of columns to be operated on i.e the number of columns of the distributed submatrix sub(
Q
 ).
n
 >= 0.
d
(global)
Array, size (
n
)
q
(local)
Pointer into the local memory to an array of size
lld_q
*
LOCc
(
jq
+
n
-1)
 .
This array contains the local pieces of the distributed matrix sub(
A
 ) to be copied from.
iq
(global)
The row index in the global array A indicating the first row of sub(
Q
 ).
jq
(global)
The column index in the global array A indicating the first column of sub(
Q
 ).
descq
(global and local)
Array of size
dlen_
.
The array descriptor for the distributed matrix
A
.
work
(local)
Array, size (
lwork
)
lwork
(local)
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)
Array, size (
liwork
)
liwork
(local)
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)
= 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
.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.