| 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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