Function quantize_large_neon 

pub fn quantize_large_neon(
    token: NeonToken,
    dct_coeffs: &[f32],
    weights: &[f32],
    qac_qm: f32,
    thresholds: &[f32; 4],
    grid_width: usize,
    grid_height: usize,
    llf_x: usize,
    llf_y: usize,
    output: &mut [i32],
)