- core/layout.cuh: block_ddf(f, block_cell[, cells]) returns the start of a
block's populations and block_slot(block_cell, cells, q) the offset of one
population; BlockHaloCopy, BlockExplode and BlockExplodeProjected use them
instead of repeating (c / cells) * NQ * cells [+ q * cells + c % cells].
BlockExplode keeps its loop-hoisted parent base; types stay uint64_t /
unsigned long; the expressions are the same ones, now named.
- core/cell_kind.cuh: fill_invalid(f) writes the NaN marker; BlockStep,
BlockChannelStep and PatchFineStep call it instead of three copies of the
loop.
No change to operation order, types, launches or arithmetic.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
