Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

  • 0.10
  • 10/21/2020
  • Public Content
Contents

p?geadd

Performs sum operation for two distributed general matrices.

Syntax

void psgeadd
(
const char
*trans
,
const MKL_INT
*m
,
const MKL_INT
*n
,
const float
*alpha
,
const float
*a
,
const MKL_INT
*ia
,
const MKL_INT
*ja
,
const MKL_INT
*desca
,
const float
*beta
,
float
*c
,
const MKL_INT
*ic
,
const MKL_INT
*jc
,
const MKL_INT
*descc
);
void pdgeadd
(
const char
*trans
,
const MKL_INT
*m
,
const MKL_INT
*n
,
const double
*alpha
,
const double
*a
,
const MKL_INT
*ia
,
const MKL_INT
*ja
,
const MKL_INT
*desca
,
const double
*beta
,
double
*c
,
const MKL_INT
*ic
,
const MKL_INT
*jc
,
const MKL_INT
*descc
);
void pcgeadd
(
const char
*trans
,
const MKL_INT
*m
,
const MKL_INT
*n
,
const MKL_Complex8
*alpha
,
const MKL_Complex8
*a
,
const MKL_INT
*ia
,
const MKL_INT
*ja
,
const MKL_INT
*desca
,
const MKL_Complex8
*beta
,
MKL_Complex8
*c
,
const MKL_INT
*ic
,
const MKL_INT
*jc
,
const MKL_INT
*descc
);
void pzgeadd
(
const char
*trans
,
const MKL_INT
*m
,
const MKL_INT
*n
,
const MKL_Complex16
*alpha
,
const MKL_Complex16
*a
,
const MKL_INT
*ia
,
const MKL_INT
*ja
,
const MKL_INT
*desca
,
const MKL_Complex16
*beta
,
MKL_Complex16
*c
,
const MKL_INT
*ic
,
const MKL_INT
*jc
,
const MKL_INT
*descc
);
Include Files
  • mkl_pblas.h
Description
The
p?geadd
 routines perform sum operation for two distributed general matrices. The operation is defined as 
sub(C):=beta*sub(C) + alpha*op(sub(A)),
where:
op(
x
)
 is one of
op(
x
) =
x
, or
op(
x
) =
x
'
,
alpha
 and
beta
 are scalars,
sub(
C
)
 is an
m
-by-
n
 distributed matrix,
sub(
C
)=
C
(
ic
:
ic
+
m
-1,
jc
:
jc
+
n
-1)
.
sub(
A
)
 is a distributed matrix,
sub(
A
)=
A
(
ia
:
ia
+
n
-1,
ja
:
ja
+
m
-1)
.
Input Parameters
trans
(global) Specifies the operation:
if
trans
 =
'N'
 or
'n'
, then
op(sub(
A
)) := sub(
A
)
;
if
trans
=
'T'
 or
't'
, then
op(sub(
A
)) := sub(
A
)
';
if
trans
 =
'C'
 or
'c'
, then
op(sub(
A
)) := sub(
A
)
'.
m
(global) Specifies the number of rows of the distributed matrix
sub(
C
)
 and the number of columns of the submatrix
sub(
A
)
,
m
≥
 0.
n
(global) Specifies the number of columns of the distributed matrix
sub(
C
)
 and the number of rows of the submatrix
sub(
A
)
,
n
≥
 0.
alpha
(global)
Specifies the scalar
alpha
.
a
(local)
Array, size
(
lld_a
, LOCq(
ja
+
m
-1))
. This array contains the local pieces of the distributed matrix
sub(
A
)
.
ia
,
ja
(global) The row and column indices in the distributed matrix
A
 indicating the first row and the first column of the submatrix
sub(
A
)
, respectively.
desca
(global and local) array of dimension 9. The array descriptor of the distributed matrix
A
.
beta
(global)
Specifies the scalar
beta
.
When
beta
 is equal to zero, then
sub(
C
)
 need not be set on input.
c
(local)
Array, size
(
lld_c
, LOCq(
jc
+
n
-1))
.
This array contains the local pieces of the distributed matrix
sub(
C
)
.
ic
,
jc
(global) The row and column indices in the distributed matrix
C
 indicating the first row and the first column of the submatrix
sub(
C
)
, respectively.
descc
(global and local) array of dimension 9. The array descriptor of the distributed matrix
C
.
Output Parameters
c
Overwritten by the updated submatrix.

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