Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

?lacp2

Copies all or part of a real two-dimensional array to a complex array.

Syntax

lapack_int
LAPACKE_clacp2
(
int
matrix_layout
,
char
uplo
,
lapack_int
m
,
lapack_int
n
,
const
float
*
a
,
lapack_int
lda
,
lapack_complex_float
*
b
,
lapack_int
ldb
);
lapack_int
LAPACKE_zlacp2
(
int
matrix_layout
,
char
uplo
,
lapack_int
m
,
lapack_int
n
,
const
double
*
a
,
lapack_int
lda
,
lapack_complex_double
*
b
,
lapack_int
ldb
);
Include Files
  • mkl.h
Description
The routine copies all or part of a real matrix
A
 to another matrix
B
.
Input Parameters
matrix_layout
Specifies whether matrix storage layout is row major (
LAPACK_ROW_MAJOR
) or column major (
LAPACK_COL_MAJOR
).
uplo
Specifies the part of the matrix
A
 to be copied to
B
.
If
uplo
 =
'U'
, the upper triangular part of
A
;
if
uplo
 =
'L'
, the lower triangular part of
A
.
Otherwise, all of the matrix
A
 is copied.
m
The number of rows in the matrix
A
 (
m
≥
 0
).
n
The number of columns in
A
 (
n
≥
 0
).
a
Array, size at least
max
(1,
lda
*
n
)
 for column major and max
(1,
lda
*
m
)
 for row major
, contains the
m
-by-
n
 matrix
A
.
If
uplo
 =
'U'
, only the upper triangle or trapezoid is accessed; if
uplo
 =
'L'
, only the lower triangle or trapezoid is accessed.
lda
The leading dimension of
a
;
lda
≥
 max(1,
m
)
for column major and
lda
≥
 max(1,
n
)
for row major
.
ldb
The leading dimension of the output array
b
;
ldb
≥
 max(1,
m
)
for column major and
ldb
≥
 max(1,
n
)
 for row major
.
Output Parameters
b
Array, size
at least max(1,
ldb
*
n
) for column major layout and max(1,
ldb
*
m
) for row major layout, contains the
m
-by-
n
 matrix
B
.
On exit,
B
 =
A
 in the locations specified by
uplo
.
Return Values
This function returns a value
info
.
If
info
 = 0
, the execution is successful.
If
info
 < 0
, 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.