org.netlib.blas
Class SDSDOT
java.lang.Object
org.netlib.blas.SDSDOT
public class SDSDOT
- extends java.lang.Object
SDSDOT is a simplified interface to the JLAPACK routine sdsdot.
This interface converts Java-style 2D row-major arrays into
the 1D column-major linearized arrays expected by the lower
level JLAPACK routines. Using this interface also allows you
to omit offset and leading dimension arguments. However, because
of these conversions, these routines will be slower than the low
level ones. Following is the description from the original Fortran
source. Contact seymour@cs.utk.edu with any questions.
* ..
*
* 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.
*
* AUTHOR
* ======
* Lawson, C. L., (JPL), Hanson, R. J., (SNLA),
* Kincaid, D. R., (U. of Texas), Krogh, F. T., (JPL)
*
* ARGUMENTS
* =========
*
* N (input) INTEGER
* number of elements in input vector(s)
*
* SB (input) REAL
* single precision scalar to be added to inner product
*
* 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
*
* SDSDOT (output) REAL
* single precision dot product (SB if N .LE. 0)
*
* 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
*
* =====================================================================
*
* .. Local Scalars ..
Method Summary |
static float |
SDSDOT(int n,
float sb,
float[] sx,
int incx,
float[] sy,
int incy)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SDSDOT
public SDSDOT()
SDSDOT
public static float SDSDOT(int n,
float sb,
float[] sx,
int incx,
float[] sy,
int incy)