fn boundary_carries<B: Backend>(
xhat_bnlchp: &F<B, 6>,
bhat_bnlchr: &F<B, 6>,
da_bnlh: &F<B, 4>,
initial_state_bhpr: &F<B, 4>,
processed: usize,
) -> Vec<F<B, 4>>Expand description
Recompute the boundary carries h₋(n) entering each of the processed
chunks (a chunk-level pass: decay-to-chunk-end GEMM + serial accumulation).