Function w8a16_gemm_pipelined_m32 

pub fn w8a16_gemm_pipelined_m32(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    input: DevicePtr,
    weight: DevicePtr,
    block_scale: DevicePtr,
    output: DevicePtr,
    m: u32,
    n: u32,
    k: u32,
    stream: u64,
) -> Result<()>

2026-09-25: Contiguous [M, K] -> [M, N] launch of the same kernel: the pitches are k and n. Same signature as super::w8a16_gemm_pipelined.