Developer Reference

  • 098
  • 03/30/2020
  • Public Content
Contents

?dotci

Computes the conjugated dot product of a compressed sparse complex vector with a full-storage complex vector.

Syntax

res
=
cdotci
(
nz
,
x
,
indx
,
y
)
res
=
zdotci
(
nz
z
,
x
,
indx
,
y
)
res
=
dotci
(
x
,
indx
,
y
)
Include Files
  • mkl.fi
    ,
    blas.f90
Description
The
?dotci
routines return the dot product of
x
and
y
defined as
conjg(
x
(1))*
y
(
indx
(1)) + ... + conjg(
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
cdotci
DOUBLE COMPLEX
for
zdotci
Array, size at least
nz
.
indx
INTEGER
.
Specifies the indices for the elements of
x
.
Array, size at least
nz
.
y
COMPLEX
for
cdotci
DOUBLE COMPLEX
for
zdotci
Array, size at least max(
indx(i)
).
Output Parameters
res
COMPLEX
for
cdotci
DOUBLE COMPLEX
for
zdotci
Contains the conjugated dot product of
x
and
y
, if
nz
is positive. Otherwise, it 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
dotci
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
).
1

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 reservered 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