Developer Reference for Intel® oneAPI Math Kernel Library - C

Developer Reference

Contents

cblas_?dot

Computes a vector-vector dot product.

Syntax

float
cblas_sdot
(
const
MKL_INT
n
,
const
float
*x
,
const
MKL_INT
incx
,
const
float
*y
,
const
MKL_INT
incy
);
double
cblas_ddot
(
const
MKL_INT
n
,
const
double
*x
,
const
MKL_INT
incx
,
const
double
*y
,
const
MKL_INT
incy
);
Include Files
  • mkl.h
Description
The
?dot
 routines perform a vector-vector reduction operation defined as
Equation
where
x
i
 and
y
i
 are elements of vectors
x
 and
y
.
Input Parameters
n
Specifies the number of elements in vectors
x
 and
y
.
x
Array, size at least
(1+(
n
-1)*abs(
incx
))
.
incx
Specifies the increment for the elements of
x
.
y
Array, size at least
(1+(
n
-1)*abs(
incy
))
.
incy
Specifies the increment for the elements of
y
.
Return Values
The result of the dot product of
x
 and
y
, if
n
 is positive. Otherwise, returns 0.

Product and Performance Information

1

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