Visible to Intel only — GUID: GUID-10E45B83-9985-497C-8202-8742FE8CCEB5
Visible to Intel only — GUID: GUID-10E45B83-9985-497C-8202-8742FE8CCEB5
?dotui
Computes the dot product of a compressed sparse complex vector by a full-storage complex vector.
Syntax
res = cdotui(nz, x, indx, y )
res = zdotui(nzz, x, indx, y )
res = dotui(x, indx, y)
Include Files
- mkl.fi, blas.f90
Description
The ?dotui routines return the dot product of x and y defined as
res = x(1)*y(indx(1)) + x(2)*y(indx(2)) +...+ x(nz)*y(indx(nz))
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
-
INTEGER. The number of elements in x and indx.
- x
-
COMPLEX for cdotui
DOUBLE COMPLEX for zdotui
Array, size at least nz.
- indx
-
INTEGER. Specifies the indices for the elements of x.
Array, size at least nz.
- y
-
COMPLEX for cdotui
DOUBLE COMPLEX for zdotui
Array, size at least max(indx(i)).
Output Parameters
- res
-
COMPLEX for cdotui
DOUBLE COMPLEX for zdotui
Contains the dot product of x and y, if nz is positive. Otherwise, res contains 0.
BLAS 95 Interface Notes
Routines in Fortran 95 interface have fewer arguments in the calling sequence than their FORTRAN 77 counterparts. For general conventions applied to skip redundant or reconstructible arguments, see BLAS 95 Interface Conventions.
Specific details for the routine dotui interface are the following:
- x
-
Holds the vector with the number of elements nz.
- indx
-
Holds the vector with the number of elements nz.
- y
-
Holds the vector with the number of elements nz.