axpy(3)                    Library Functions Manual                    axpy(3)

NAME
       axpy - axpy: y = ax + y

SYNOPSIS
   Functions
       subroutine caxpy (n, ca, cx, incx, cy, incy)
           CAXPY
       subroutine daxpy (n, da, dx, incx, dy, incy)
           DAXPY
       subroutine saxpy (n, sa, sx, incx, sy, incy)
           SAXPY
       subroutine zaxpy (n, za, zx, incx, zy, incy)
           ZAXPY

Detailed Description
Function Documentation
   subroutine caxpy (integer n, complex ca, complex, dimension(*) cx, integer
       incx, complex, dimension(*) cy, integer incy)
       CAXPY

       Purpose:


           !>
           !>    CAXPY constant times a vector plus a vector.
           !>

       Parameters
           N

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

           CA

           !>          CA is COMPLEX
           !>           On entry, CA specifies the scalar alpha.
           !>

           CX

           !>          CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
           !>

           INCX

           !>          INCX is INTEGER
           !>         storage spacing between elements of CX
           !>

           CY

           !>          CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
           !>

           INCY

           !>          INCY is INTEGER
           !>         storage spacing between elements of CY
           !>

       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 87 of file caxpy.f.

   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.

       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.

   subroutine saxpy (integer n, real sa, real, dimension(*) sx, integer incx,
       real, dimension(*) sy, integer incy)
       SAXPY

       Purpose:


           !>
           !>    SAXPY 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)
           !>

           SA

           !>          SA is REAL
           !>           On entry, SA specifies the scalar alpha.
           !>

           SX

           !>          SX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
           !>

           INCX

           !>          INCX is INTEGER
           !>         storage spacing between elements of SX
           !>

           SY

           !>          SY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
           !>

           INCY

           !>          INCY is INTEGER
           !>         storage spacing between elements of SY
           !>

       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 saxpy.f.

   subroutine zaxpy (integer n, complex*16 za, complex*16, dimension(*) zx,
       integer incx, complex*16, dimension(*) zy, integer incy)
       ZAXPY

       Purpose:


           !>
           !>    ZAXPY constant times a vector plus a vector.
           !>

       Parameters
           N

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

           ZA

           !>          ZA is COMPLEX*16
           !>           On entry, ZA specifies the scalar alpha.
           !>

           ZX

           !>          ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
           !>

           INCX

           !>          INCX is INTEGER
           !>         storage spacing between elements of ZX
           !>

           ZY

           !>          ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
           !>

           INCY

           !>          INCY is INTEGER
           !>         storage spacing between elements of ZY
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Further Details:


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

       Definition at line 87 of file zaxpy.f.

Author
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LAPACK                          Version 3.12.0                         axpy(3)