Per CUTLASS guidance:
- make_tiled_copy_C/D encode wrong invariants for this transfer
- Build custom R→S copy where TV map comes from tTMEM_LOADcS (softmax thread
ownership) and destination addresses come from sP layout (PV A-operand swizzled SMEM)
- Use composition(sP_2d_layout, p_coord_layout) for atom_layout_tv
- Start with scalar BF16 (16-bit) stores — vectorize later
- Zero-fill source for compile test, will fill with actual P values next
biondizzle
2bbe55b08c