cblas_?dotui
cblas_?dotui
Computes the dot product of a compressed sparse complex vector by a full-storage complex vector.
Syntax
void
cblas_cdotui_sub
(
const
MKL_INT
nz
,
const
void
*x
,
const
MKL_INT
*indx
,
const
void
*y
,
void
*dotui
);
void
cblas_zdotui_sub
(
const
MKL_INT
nz
,
const
void
*x
,
const
MKL_INT
*indx
,
const
void
*y
,
void
*dotui
);
Include Files
- mkl.h
Description
The
?dotui
routines return the dot product of x
and y
defined asres = x[0]*y[indx[0]] + x[1]*y(indx[1]) +...+ x[nz - 1]*y[indx[nz - 1]]
where the triple (
nz
, x
, indx
) defines a sparse complex vector stored in compressed form, and y
is a real vector in full storage form. The functions reference only the elements of y
whose indices are listed in the array indx
. The values in indx
must be distinct.Input Parameters
- nz
- The number of elements inxandindx.
- x
- Array, size at leastnz.
- indx
- Specifies the indices for the elements ofx.Array, size at leastnz.
- y
- Array, size at least max(indx[i]).
Output Parameters
- dotui
- Contains the dot product ofxandy, ifnzis positive. Otherwise,rescontains0.