Function moe_hash_route 

pub fn moe_hash_route(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    gate_logits: DevicePtr,
    tid2eid: DevicePtr,
    token_id_ptr: DevicePtr,
    expert_indices: DevicePtr,
    expert_weights: DevicePtr,
    num_experts: u32,
    top_k: u32,
    normalize: bool,
    scaling_factor: f32,
    stream: u64,
) -> Result<()>

2026-09-25: Hash router, one token: the experts are the static tid2eid[token_id] row, and the gate’s sqrt-softplus scores weight them. The token id is read on the device from token_id_ptr.