Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 0.9
  • 09/09/2020
  • Public Content
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

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804