BLAS/SRC/daxpy.f(3) Library Functions Manual BLAS/SRC/daxpy.f(3)

BLAS/SRC/daxpy.f


subroutine daxpy (n, da, dx, incx, dy, incy)
DAXPY

DAXPY

Purpose:

    DAXPY constant times a vector plus a vector.
    uses unrolled loops for increments equal to one.

Parameters

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

DA

          DA is DOUBLE PRECISION
           On entry, DA specifies the scalar alpha.

DX

          DX is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX

          INCX is INTEGER
         storage spacing between elements of DX

DY

          DY is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY

          INCY is INTEGER
         storage spacing between elements of DY

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

     jack dongarra, linpack, 3/11/78.
     modified 12/3/93, array(1) declarations changed to array(*)

Definition at line 88 of file daxpy.f.

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