The MLP over Trellis-coded projections (a packed-Trellis artifact's
mode: "trellis" entries). Its input is the post-attention norm's output,
which RMSNorm writes as a fresh aligned row-contiguous array: the gate and up
projections take that layout as given, so the Trellis prefill matches the
native small-prefill matmul without an evaluation.
x [.., hidden] (borrowed, row-contiguous) to an owned [.., hidden].
Every phase computes the same rows; width is the class of x's rows,
named by the caller.
The MLP over Trellis-coded projections (a packed-Trellis artifact's
mode: "trellis"entries). Its input is the post-attention norm's output, which RMSNorm writes as a fresh aligned row-contiguous array: the gate and up projections take that layout as given, so the Trellis prefill matches the native small-prefill matmul without an evaluation.