Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

?lapmr

Rearranges rows of a matrix as specified by a permutation vector.

Syntax

lapack_int
LAPACKE_slapmr
(
int
matrix_layout
,
lapack_logical
forwrd
,
lapack_int
m
,
lapack_int
n
,
float
*
x
,
lapack_int
ldx
,
lapack_int
*
k
);
lapack_int
LAPACKE_dlapmr
(
int
matrix_layout
,
lapack_logical
forwrd
,
lapack_int
m
,
lapack_int
n
,
double
*
x
,
lapack_int
ldx
,
lapack_int
*
k
);
lapack_int
LAPACKE_clapmr
(
int
matrix_layout
,
lapack_logical
forwrd
,
lapack_int
m
,
lapack_int
n
,
lapack_complex_float
*
x
,
lapack_int
ldx
,
lapack_int
*
k
);
lapack_int
LAPACKE_zlapmr
(
int
matrix_layout
,
lapack_logical
forwrd
,
lapack_int
m
,
lapack_int
n
,
lapack_complex_double
*
x
,
lapack_int
ldx
,
lapack_int
*
k
);
Include Files
  • mkl.h
Description
The
?lapmr
 routine rearranges the rows of the
m
-by-
n
 matrix
X
 as specified by the permutation
k[0], k[1], ... , k[
m
-1]
of the integers
1,...,
m
.
If
forwrd
 is true, forward permutation:
X
(
k
[
i
-1],:)
 is moved to
X
{
i
,:)
 for
i
= 1,2,...,
m
.
If
forwrd
 is false, backward permutation:
X
{
i
,:)
 is moved to
X
(
k
[
i
-1,:)
 for
i
 = 1,2,...,
m
.
Input Parameters
A
<datatype>
 placeholder, if present, is used for the C interface data types in the C interface section above. See C Interface Conventions for the C interface principal conventions and type definitions.
forwrd
If
forwrd
is true
, forward permutation.
If
forwrd
is false
, backward permutation.
m
The number of rows of the matrix
X
.
m
≥
 0
.
n
The number of columns of the matrix
X
.
n
≥
 0
.
x
Array, size
at least
max(1,
ldx
*
n
)
 for column major and
max(1,
ldx
*
m
)
 for row major layout.
On entry, the
m
-by-
n
 matrix
X
.
ldx
The leading dimension of the array
X
,
ldx
≥
 max(1,
m
)
for column major layout and
ldx
≥
 max(1,
n
) for row major layout
.
k
Array, size (
m
). On entry,
k
 contains the permutation vector and is used as internal workspace.
Output Parameters
x
On exit,
x
 contains the permuted matrix
X
.
k
On exit,
k
 is reset to its original value.
Return Values
This function returns a value
info
.
If
info
 = 0
, the execution is successful.
If
info
 =
-i
, the
i
-th parameter had an illegal value.
If
info
 = -1011
, memory allocation error occurred.

Product and Performance Information

1

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