Function gdn_verify_fused_conv_kn 

pub fn gdn_verify_fused_conv_kn(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    conv_state: DevicePtr,
    new_input: DevicePtr,
    weight: &DenseWeight,
    output: DevicePtr,
    conv_state_inter: DevicePtr,
    num_tokens: u32,
    d_inner: u32,
    d_conv: u32,
    qk_channels: u32,
    head_dim: u32,
    input_stride: u32,
    output_stride: u32,
    inter_stride: u32,
    l2_eps: f32,
    stream: u64,
) -> Result<()>

2026-09-25: K-position verify conv1d + SiLU + L2 norm: all num_tokens draft positions in one launch. Position t’s conv-state snapshot is written to conv_state_inter + t * inter_stride.

On return conv_state holds the window after the last position, which is also snapshot num_tokens - 1.

Kernel: gdn_verify_fused_conv_kn(conv_state, new_input, weight, output, conv_state_inter, num_tokens, dim, d_conv, qk_channels, head_dim, input_stride, output_stride, inter_stride, l2_eps) Grid: (ceil(dim/256), 1, 1) Block: (256, 1, 1)