WSJT-X/libm65/interleave9.f90
Joe Taylor 8a3b15aba9 More work on jt9sim.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2604 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2012-09-28 19:42:00 +00:00

40 lines
808 B
Fortran

subroutine interleave9(ia,ndir,ib)
integer*1 ia(0:205),ib(0:205)
integer j0(0:205)
logical first
data first/.true./
save first,j0 !Save not working, or j0 overwritten ???
if(first) then
k=-1
do i=0,255
m=i
n=iand(m,1)
n=2*n + iand(m/2,1)
n=2*n + iand(m/4,1)
n=2*n + iand(m/8,1)
n=2*n + iand(m/16,1)
n=2*n + iand(m/32,1)
n=2*n + iand(m/64,1)
n=2*n + iand(m/128,1)
if(n.le.205) then
k=k+1
j0(k)=n
endif
enddo
! first=.false.
endif
if(ndir.gt.0) then
do i=0,205
ib(j0(i))=ia(i)
enddo
else
do i=0,205
ib(i)=ia(j0(i))
enddo
endif
return
end subroutine interleave9