WSJT-X/map65/libm65/interleave63.f90

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subroutine interleave63(d1,idir)
! Interleave (idir=1) or de-interleave (idir=-1) the array d1.
integer d1(0:6,0:8)
integer d2(0:8,0:6)
if(idir.ge.0) then
do i=0,6
do j=0,8
d2(j,i)=d1(i,j)
enddo
enddo
call move(d2,d1,63)
else
call move(d1,d2,63)
do i=0,6
do j=0,8
d1(i,j)=d2(j,i)
enddo
enddo
endif
return
end subroutine interleave63