Function w4a16_tc_rows_shape_ok 

pub fn w4a16_tc_rows_shape_ok(
    m: u32,
    n: u32,
    k: u32,
    lda: u32,
    ldc: u32,
) -> bool

2026-10-02: The kernel’s shape contract, without a GPU: 1..=64 rows, any positive N (the entry points are ragged: a partial last CTA loads zero weight rows and stores nothing past N), K a positive multiple of 256 (whole load groups of every entry point), and an A pitch that keeps rows 16-byte aligned and covers K; the C pitch covers N.