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Workaround for submodule-related bug in GFortran-9 #59

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Merged
merged 1 commit into from
May 3, 2022
Merged

Workaround for submodule-related bug in GFortran-9 #59

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2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -45,7 +45,7 @@ Dependencies:

Compilers tested include:

* gfortran-10.3.0
* gfortran-9.4.0
* ifort-2021.4
* ifx-2021.4

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12 changes: 6 additions & 6 deletions src/mod_parallel_submodule.f90
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Expand Up @@ -5,22 +5,22 @@

contains

pure module function tile_indices(dims)
pure module function tile_indices(dims) result(res)
integer(ik), intent(in) :: dims
integer(ik) :: tile_indices(2)
integer(ik) :: res(2)
integer(ik) :: offset, tile_size

tile_size = dims / num_images()

!! start and end indices assuming equal tile sizes
tile_indices(1) = (this_image() - 1) * tile_size + 1
tile_indices(2) = tile_indices(1) + tile_size - 1
res(1) = (this_image() - 1) * tile_size + 1
res(2) = res(1) + tile_size - 1

!! if we have any remainder, distribute it to the tiles at the end
offset = num_images() - mod(dims, num_images())
if (this_image() > offset) then
tile_indices(1) = tile_indices(1) + this_image() - offset - 1
tile_indices(2) = tile_indices(2) + this_image() - offset
res(1) = res(1) + this_image() - offset - 1
res(2) = res(2) + this_image() - offset
end if

end function tile_indices
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