Function convolve_u64_fft_scalar 

fn convolve_u64_fft_scalar(a: Vec<u64>, b: Vec<u64>) -> Vec<u64>

Examples found in repository

crates/competitive/src/math/number_theoretic_transform.rs (line 1119)

fn convolve_u64_fft(a: Vec<u64>, b: Vec<u64>) -> Vec<u64> {
    // Keep limb convolutions below 2^47 at the 2^21 FFT limit.
    crate::avx_helper!(@dispatch_avx2_fma return unsafe {
        convolve_u64_avx2(a, b)
    }, ());
    convolve_u64_fft_scalar(a, b)
}