2. EL 9
  3. blas
  4. daxpy(3)

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daxpy.f(3) LAPACK daxpy.f(3)

NAME

daxpy.f

SYNOPSIS

Functions/Subroutines


subroutine daxpy (N, DA, DX, INCX, DY, INCY)
DAXPY

Function/Subroutine Documentation

subroutine daxpy (integer N, double precision DA, double precision, dimension(*) DX, integer INCX, double precision, dimension(*) DY, integer INCY)

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.

Date:

November 2017

Further Details: 



     jack dongarra, linpack, 3/11/78.


     modified 12/3/93, array(1) declarations changed to array(*)

Definition at line 91 of file daxpy.f.

Author

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