| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| subroutine neighbors () |
| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| implicit none |
| |
| include 'applu.incl' |
| |
| c--------------------------------------------------------------------- |
| c figure out the neighbors and their wrap numbers for each processor |
| c--------------------------------------------------------------------- |
| |
| south = -1 |
| east = -1 |
| north = -1 |
| west = -1 |
| |
| if (row.gt.1) then |
| north = id -1 |
| else |
| north = -1 |
| end if |
| |
| if (row.lt.xdim) then |
| south = id + 1 |
| else |
| south = -1 |
| end if |
| |
| if (col.gt.1) then |
| west = id- xdim |
| else |
| west = -1 |
| end if |
| |
| if (col.lt.ydim) then |
| east = id + xdim |
| else |
| east = -1 |
| end if |
| |
| return |
| end |
