pub const W8A16_M16_MAX_ROWS: u32 = 16;Expand description
2026-09-27: Rows the skinny body of the same kernel takes (PM16_MAX_M),
when K is at most W8A16_M16_MAX_K. It gives each 8-column block the
canonical tile’s per-output arithmetic with the 128-K steps’ products
computed in parallel by 8 warps and added in step order.