| 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 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 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 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 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 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 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 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 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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