sdsdot.f - Man Page

real function sdsdot (n, sb, sx, incx, sy, incy)
SDSDOT

SDSDOT

Purpose:

   Compute the inner product of two vectors with extended
   precision accumulation.

   Returns S.P. result with dot product accumulated in D.P.
   SDSDOT = SB + sum for I = 0 to N-1 of SX(LX+I*INCX)*SY(LY+I*INCY),
   where LX = 1 if INCX .GE. 0, else LX = 1+(1-N)*INCX, and LY is
   defined in a similar way using INCY.

Parameters

N

          N is INTEGER
          number of elements in input vector(s)

SB

          SB is REAL
          single precision scalar to be added to inner product

SX

          SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
          single precision vector with N elements

INCX

          INCX is INTEGER
          storage spacing between elements of SX

SY

          SY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
          single precision vector with N elements

INCY

          INCY is INTEGER
          storage spacing between elements of SY

Author

Lawson, C. L., (JPL), Hanson, R. J., (SNLA),

Kincaid, D. R., (U. of Texas), Krogh, F. T., (JPL)

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

    REFERENCES

    C. L. Lawson, R. J. Hanson, D. R. Kincaid and F. T.
    Krogh, Basic linear algebra subprograms for Fortran
    usage, Algorithm No. 539, Transactions on Mathematical
    Software 5, 3 (September 1979), pp. 308-323.

    REVISION HISTORY  (YYMMDD)

    791001  DATE WRITTEN
    890531  Changed all specific intrinsics to generic.  (WRB)
    890831  Modified array declarations.  (WRB)
    890831  REVISION DATE from Version 3.2
    891214  Prologue converted to Version 4.0 format.  (BAB)
    920310  Corrected definition of LX in DESCRIPTION.  (WRB)
    920501  Reformatted the REFERENCES section.  (WRB)
    070118  Reformat to LAPACK coding style

Definition at line 112 of file sdsdot.f.