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DSDOT(1)			 BLAS routine			      DSDOT(1)

NAME
       DSDOT - accumulation and result

SYNOPSIS
       DOUBLE PRECISION FUNCTION DSDOT(N,SX,INCX,SY,INCY)

	   INTEGER	INCX,INCY,N

	   REAL		SX(*),SY(*)

PURPOSE
       precision accumulation and result.

       Returns	D.P. dot product accumulated in D.P., for S.P. SX and SY DSDOT
       = 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.

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

       SX     (input) REAL array, dimension(N)
	      single precision vector with N elements

       INCX   (input) INTEGER
	      storage spacing between elements of SX

       SY     (input) REAL array, dimension(N)
	      single precision vector with N elements

       INCY   (input) INTEGER
	      storage spacing between elements of SY

       DSDOT  (output) DOUBLE PRECISION
	      DSDOT  double precision dot product (zero if N.LE.0)

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
       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 style (JL)

BLAS routine			 November 2008			      DSDOT(1)
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