sema: r420c 2D fills/copies with pitch == row length cover all rows

victory_memset2d failed deterministically (bad ~= 12.5M of 12.58M) because
its pitched operations carry PITCH == LINE_LENGTH (cudaMallocPitch returned
pitch 4096 for width 4096) and the r402 2D decode only entered row mode
when a pitch was WIDER than the row. The flat path then ran ONE row
(LINE_LENGTH bytes) per op, so every cudaMemcpy2D readback and H2D upload
delivered only its first row and every cudaMemset2D-sized region beyond it
kept stale content - the 'deterministic readback loss' (45K of 12.58M
correct ~= the rows the single runs happened to cover).

LINE_COUNT is now authoritative for the flat case too: pitch == row length
(or no pitch method) means CONTIGUOUS rows, so the single run covers
rows*line bytes (element-exact when the line divides evenly, else byte
exact). A pitch wider than the row keeps the r402 row-wise mode; 1D ops are
unchanged. Both the fill (cudaMemset2D/fill) and the copy (cudaMemcpy2D)
decode are fixed.

0 files changed, 0 insertions, 0 deletions