Function w8a16_tc_rows 

pub fn w8a16_tc_rows(
    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<()>

2026-09-28: The launch itself, with no policy check: input [m, a_row_stride] BF16, weight [n, k] E4M3, block_scale [n / 128, k / 128] FP32, output [m, c_row_stride] BF16. Refuses a shape w8a16_tc_rows_shape_ok refuses.