share/lapack/blas/fortran/zcopy.f

   1       subroutine  zcopy(n,zx,incx,zy,incy)
   2 c
   3 c     copies a vector, x, to a vector, y.
   4 c     jack dongarra, linpack, 4/11/78.
   5 c     modified 12/3/93, array(1) declarations changed to array(*)
   6 c
   7       double complex zx(*),zy(*)
   8       integer i,incx,incy,ix,iy,n
   9 c
  10       if(n.le.0)return
  11       if(incx.eq.1.and.incy.eq.1)go to 20
  12 c
  13 c        code for unequal increments or equal increments
  14 c          not equal to 1
  15 c
  16       ix = 1
  17       iy = 1
  18       if(incx.lt.0)ix = (-n+1)*incx + 1
  19       if(incy.lt.0)iy = (-n+1)*incy + 1
  20       do 10 i = 1,n
  21         zy(iy) = zx(ix)
  22         ix = ix + incx
  23         iy = iy + incy
  24    10 continue
  25       return
  26 c
  27 c        code for both increments equal to 1
  28 c
  29    20 do 30 i = 1,n
  30         zy(i) = zx(i)
  31    30 continue
  32       return
  33       end