sdoti (3p)

Name

sdoti - Compute the indexed dot product.

Synopsis

REAL FUNCTION SDOTI(NZ, X, INDX, Y)

REAL X(*), Y(*)
INTEGER NZ
INTEGER INDX(*)

REAL FUNCTION SDOTI_64(NZ, X, INDX, Y)

REAL X(*), Y(*)
INTEGER*8 NZ
INTEGER*8 INDX(*)


F95 INTERFACE
REAL FUNCTION DOTI(NZ, X, INDX, Y)

REAL, DIMENSION(:) :: X, Y
INTEGER :: NZ
INTEGER, DIMENSION(:) :: INDX

REAL FUNCTION DOTI_64(NZ, X, INDX, Y)

REAL, DIMENSION(:) :: X, Y
INTEGER(8) :: NZ
INTEGER(8), DIMENSION(:) :: INDX





C INTERFACE
#include <sunperf.h>

float sdoti (const int nz, const float* x, const int* indx, const
float* y);

float sdoti_64 (const long nz, const float* x, const long* indx, const
float* y);

Description

Oracle Solaris Studio Performance Library                            sdoti(3P)



NAME
       sdoti - Compute the indexed dot product.

SYNOPSIS
        REAL FUNCTION SDOTI(NZ, X, INDX, Y)

        REAL X(*), Y(*)
        INTEGER NZ
        INTEGER INDX(*)

        REAL FUNCTION SDOTI_64(NZ, X, INDX, Y)

        REAL X(*), Y(*)
        INTEGER*8 NZ
        INTEGER*8 INDX(*)


   F95 INTERFACE
        REAL FUNCTION DOTI(NZ, X, INDX, Y)

        REAL, DIMENSION(:) :: X, Y
        INTEGER :: NZ
        INTEGER, DIMENSION(:) :: INDX

        REAL FUNCTION DOTI_64(NZ, X, INDX, Y)

        REAL, DIMENSION(:) :: X, Y
        INTEGER(8) :: NZ
        INTEGER(8), DIMENSION(:) :: INDX





   C INTERFACE
       #include <sunperf.h>

       float sdoti (const int nz, const float* x, const int* indx, const
                 float* y);

       float sdoti_64 (const long nz, const float* x, const long* indx, const
                 float* y);




PURPOSE
       SDOTI Compute the indexed dot product of a real sparse vector x stored
       in compressed form with a real 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         7 Nov 2015                         sdoti(3P)