Function fp8_gemv_rowscale_batch16_rt2 

pub fn fp8_gemv_rowscale_batch16_rt2(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    input: DevicePtr,
    weight: &Fp8DenseWeight,
    output: DevicePtr,
    m: u32,
    n: u32,
    k: u32,
    stream: u64,
) -> Result<()>

2026-09-25: The 16-row instantiation of the same kernel template (fp8_gemv_rowscale_batch16_rt2, module fp8_gemv_rt), with the launch geometry of fp8_gemv_rowscale_batch8_rt2. Refuses m outside 1..=16 and a k that is not a multiple of 16.