zdotci(3P) Sun Performance Library zdotci(3P)NAMEzdotci - Compute the complex conjugated indexed dot product.
SYNOPSIS
DOUBLE COMPLEX FUNCTION ZDOTCI(NZ, X, INDX, Y)
DOUBLE COMPLEX X(*), Y(*)
INTEGER NZ
INTEGER INDX(*)
DOUBLE COMPLEX FUNCTION ZDOTCI_64(NZ, X, INDX, Y)
DOUBLE COMPLEX X(*), Y(*)
INTEGER*8 NZ
INTEGER*8 INDX(*)
F95 INTERFACE
DOUBLE COMPLEX FUNCTION DOTCI([NZ], X, INDX, Y)
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: NZ
INTEGER, DIMENSION(:) :: INDX
DOUBLE COMPLEX FUNCTION DOTCI_64([NZ], X, INDX, Y)
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER(8) :: NZ
INTEGER(8), DIMENSION(:) :: INDX
C INTERFACE
#include <sunperf.h>
doublecomplex zdotci (const int nz, const doublecomplex* x, const int*
indx, const doublecomplex* y);
doublecomplex zdotci_64 (const long nz, const doublecomplex* x, const
long* indx, const doublecomplex* y);
PURPOSE
ZDOTCI Compute the complex conjugated indexed dot product of a complex
sparse vector x stored in compressed form with a complex vector y in
full storage form.
dot = 0
do i = 1, n
dot = dot + conjg(x(i)) * y(indx(i))
enddo
ARGUMENTS
NZ (input)
Number of elements in the compressed form. Unchanged on exit.
X (input)
Vector in compressed form. Unchanged on exit.
INDX (input)
Vector containing the indices of the compressed form. It is
assumed that the elements in INDX are distinct and greater than
zero. Unchanged on exit.
Y (input)
Vector in full storage form. Only the elements corresponding
to the indices in INDX will be accessed.
3rd Berkeley Distribution 6 Mar 2009 zdotci(3P)
