caxpycf.f

subroutinecaxpycf(n,ca,cx,incx,cy,incy)
c
c constant times a vector plus a vector.
c jack dongarra, linpack, 3/11/78.
c modified 12/3/93, array(1) declarations changed to array(*)
c
complex cx(*),cy(*),ca
integer i,incx,incy,ix,iy,n
INTRINSIC conjg
c
if(n.le.0)return
if (abs(real(ca)) +abs(aimag(ca)) .eq.0.0 ) return
if(incx.eq.1.and.incy.eq.1)go to20
c
c code for unequal increments or equal increments
c not equal to 1
c
 ix =1
 iy =1
if(incx.lt.0)ix = (-n+1)*incx +1
if(incy.lt.0)iy = (-n+1)*incy +1
do10 i =1,n
 cy(iy) = cy(iy) + ca*conjg(cx(ix))
 ix = ix + incx
 iy = iy + incy
10continue
return
c
c code for both increments equal to 1
c
20do30 i =1,n
 cy(i) = cy(i) + ca*conjg(cx(i))
30continue
return
end