Function deinterleave_qg_split_qnorm_mrope 

pub fn deinterleave_qg_split_qnorm_mrope(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    data: DevicePtr,
    q_out: DevicePtr,
    q_norm_weight: DevicePtr,
    pos_t: DevicePtr,
    pos_h: DevicePtr,
    pos_w: DevicePtr,
    num_tokens: u32,
    num_heads: u32,
    head_dim: u32,
    stride: u32,
    rotary_dim: u32,
    eps: f32,
    theta: f32,
    stream: u64,
) -> Result<()>

Fused deinterleave Q/Gate + per-head Q RMS norm + MRoPE.

Holo/Qwen3.6 MRoPE prefill fast path. Gate is deinterleaved to data[q_total..]; Q is deinterleaved, normalized, MRoPE-rotated, then written to q_out.