zdotui(3P) Sun Performance Library zdotui(3P)NAMEzdotui - Compute the complex unconjugated indexed dot product.
SYNOPSIS
DOUBLE COMPLEX FUNCTION CDOTUI(NZ, X, INDX, Y)
DOUBLE COMPLEX X(*), Y(*)
INTEGER NZ
INTEGER INDX(*)
DOUBLE COMPLEX FUNCTION CDOTUI_64(NZ, X, INDX, Y)
DOUBLE COMPLEX X(*), Y(*)
INTEGER*8 NZ
INTEGER*8 INDX(*)
F95 INTERFACE
DOUBLE COMPLEX FUNCTION DOTUI([NZ], X, INDX, Y)
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: NZ
INTEGER, DIMENSION(:) :: INDX
DOUBLE COMPLEX FUNCTION DOTUI_64([NZ], X, INDX, Y)
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER(8) :: NZ
INTEGER(8), DIMENSION(:) :: INDX
C INTERFACE
#include <sunperf.h>
doublecomplex zdotui (const int nz, const doublecomplex* x, const int*
indx, const doublecomplex* y);
doublecomplex zdotui_64 (const long nz, const doublecomplex* x, const
long* indx, const doublecomplex* y);
PURPOSE
ZDOTUI Compute the complex unconjugated indexed dot product of a com‐
plex sparse vector x stored in compressed form with a complex vector y
in full storage form.
dot = 0
do i = 1, n
dot = dot + 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 zdotui(3P)
