The host sized the grid from 2*max_hkl while the kernel guards against
2*max_hkl+1, so whenever the rounded-up grid landed exactly on 2*max_hkl threads
(max_hkl a multiple of 4, with the 8x8x8 block) the h = +max_hkl plane was never
launched. The CPU loop runs -max_hkl..+max_hkl inclusive, so the GPU predicted a
strict subset.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 5
0076b76566