Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 0.9
  • 09/09/2020
  • Public Content
Contents

p?lacgv

Conjugates a complex vector.

Syntax

void
pclacgv
(
MKL_INT
*n
,
MKL_Complex8
*x
,
MKL_INT
*ix
,
MKL_INT
*jx
,
MKL_INT
*descx
,
MKL_INT
*incx
);
void
pzlacgv
(
MKL_INT
*n
,
MKL_Complex16
*x
,
MKL_INT
*ix
,
MKL_INT
*jx
,
MKL_INT
*descx
,
MKL_INT
*incx
);
Include Files
  • mkl_scalapack.h
Description
The
p?lacgv
function
conjugates a complex vector
sub(
X
)
 of length
n
, where
sub(
X
)
 denotes
X
(
ix
,
jx
:
jx
+
n
-1)
 if
incx
 =
m_x
, and
X
(
ix
:
ix
+
n
-1,
jx
)
 if
incx
 = 1
.
Input Parameters
n
(global) The length of the distributed vector sub(
X
)
.
x
(local).
Pointer into the local memory to an array of size
lld_x
 *
LOCc
(
n_x
)
. On entry the vector to be conjugated
x
[i] =
X
(
i
x+(
jx
-1)*
m_x
+
i
*
incx
)
,
0 ≤
i
 <
n
.
ix
(global) The row index in the global matrix
X
 indicating the first row of sub(
X
).
jx
(global) The column index in the global matrix
X
 indicating the first column of sub(
X
).
descx
(global and local) Array of size
dlen_
=9. The array descriptor for the distributed matrix
X
.
incx
(global) The global increment for the elements of
X
. Only two values of
incx
 are supported in this version, namely 1 and
m_x
.
incx
 must not be zero.
Output Parameters
x
(local).
On exit, the local pieces of conjugated distributed vector sub(
X
).

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