cdotci(3P) Sun Performance Library cdotci(3P)NAMEcdotci - Compute the complex conjugated indexed dot product.
SYNOPSIS
COMPLEX FUNCTION CDOTCI(NZ, X, INDX, Y)
COMPLEX X(*), Y(*)
INTEGER NZ
INTEGER INDX(*)
COMPLEX FUNCTION CDOTCI_64(NZ, X, INDX, Y)
COMPLEX X(*), Y(*)
INTEGER*8 NZ
INTEGER*8 INDX(*)
F95 INTERFACE
COMPLEX FUNCTION DOTCI([NZ], X, INDX, Y)
COMPLEX, DIMENSION(:) :: X, Y
INTEGER :: NZ
INTEGER, DIMENSION(:) :: INDX
COMPLEX FUNCTION DOTCI_64([NZ], X, INDX, Y)
COMPLEX, DIMENSION(:) :: X, Y
INTEGER(8) :: NZ
INTEGER(8), DIMENSION(:) :: INDX
C INTERFACE
#include <sunperf.h>
floatcomplex cdotci (const int nz, const floatcomplex* x, const int*
indx, const floatcomplex* y);
floatcomplex cdotci_64 (const long nz, const floatcomplex* x, const
long* indx, const floatcomplex* y);
PURPOSE
CDOTCI 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 cdotci(3P)
