Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

cblas_?geru

Performs a rank-1 update (unconjugated) of a general matrix.

Syntax

void
cblas_cgeru
(
const
CBLAS_LAYOUT
Layout
,
const
MKL_INT
m
,
const
MKL_INT
n
,
const
void
*alpha
,
const
void
*x
,
const
MKL_INT
incx
,
const
void
*y
,
const
MKL_INT
incy
,
void
*a
,
const
MKL_INT
lda
);
void
cblas_zgeru
(
const
CBLAS_LAYOUT
Layout
,
const
MKL_INT
m
,
const
MKL_INT
n
,
const
void
*alpha
,
const
void
*x
,
const
MKL_INT
incx
,
const
void
*y
,
const
MKL_INT
incy
,
void
*a
,
const
MKL_INT
lda
);
Include Files
  • mkl.h
Description
The
?geru
 routines perform a matrix-vector operation defined as 
A := alpha*x*y ' + A,
where:
alpha
 is a scalar,
x
 is an
m
-element vector,
y
 is an
n
-element vector,
A
 is an
m
-by-
n
 matrix.
Input Parameters
Layout
Specifies whether two-dimensional array storage is row-major (
CblasRowMajor
) or column-major (
CblasColMajor
).
m
Specifies the number of rows of the matrix
A
.
The value of
m
 must be at least zero.
n
Specifies the number of columns of the matrix
A
.
The value of
n
 must be at least zero.
alpha
Specifies the scalar
alpha
.
x
Array, size at least
(1 + (
m
 - 1)*abs(
incx
))
. Before entry, the incremented array
x
 must contain the
m
-element vector
x
.
incx
Specifies the increment for the elements of
x
.
The value of
incx
 must not be zero.
y
Array, size at least
(1 + (
n
 - 1)*abs(
incy
))
. Before entry, the incremented array
y
 must contain the
n
-element vector
y
.
incy
Specifies the increment for the elements of
y
.
The value of
incy
 must not be zero.
a
Array, size
lda
*
k
.
For
Layout
 =
CblasColMajor
,
k
 is
n
. Before entry, the leading
m
-by-
n
 part of the array
a
 must contain the matrix
A
.
For
Layout
 =
CblasRowMajor
,
k
 is
m
. Before entry, the leading
n
-by-
m
 part of the array
a
 must contain the matrix
A
.
lda
Specifies the leading dimension of
a
 as declared in the calling (sub)program.
For
Layout
 =
CblasColMajor
, the value of
lda
 must be at least
max(1,
m
)
.
For
Layout
 =
CblasRowMajor
, the value of
lda
 must be at least
max(1,
n
)
.
Output Parameters
a
Overwritten by the updated matrix.

Product and Performance Information

1

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