Function w8a16_tc_rows_launch 

pub fn w8a16_tc_rows_launch(
    gpu: &dyn GpuBackend,
    input: DevicePtr,
    weight: DevicePtr,
    block_scale: DevicePtr,
    output: DevicePtr,
    m: u32,
    n: u32,
    k: u32,
    a_row_stride: u32,
    c_row_stride: u32,
    stream: u64,
) -> Result<bool>

2026-09-28: Launches [m, k] x [n, k]^T through w8a16_tc_rows_{16,32,64} and returns true when the lever is on, the process runs RowTiers::Canonical, the shape passes w8a16_tc_rows_shape_ok and the target ships the module; otherwise returns false and launches nothing.