1use std::hint::black_box;
 2
 3use criterion::{BenchmarkId, Criterion, criterion_group, criterion_main};
 4use poulpy_hal::reference::fft64::reim::{ReimDFTExecute, ReimFFTRef, ReimFFTTable, ReimIFFTRef, ReimIFFTTable};
 5
 6pub fn bench_fft_ref(c: &mut Criterion) {
 7    let group_name: String = "fft_ref".to_string();
 8
 9    let mut group = c.benchmark_group(group_name);
10
11    fn runner(m: usize) -> impl FnMut() {
12        let mut values: Vec<f64> = vec![0f64; m << 1];
13        let scale: f64 = 1.0f64 / (2 * m) as f64;
14        values.iter_mut().enumerate().for_each(|(i, x)| *x = (i + 1) as f64 * scale);
15        let table: ReimFFTTable<f64> = ReimFFTTable::<f64>::new(m);
16        move || {
17            ReimFFTRef::reim_dft_execute(&table, &mut values);
18            black_box(());
19        }
20    }
21
22    for log_m in [9, 10, 11, 12, 13, 14, 15] {
23        let id: BenchmarkId = BenchmarkId::from_parameter(format!("n: {}", 2 << log_m));
24        let mut runner = runner(1 << log_m);
25        group.bench_with_input(id, &(), |b, _| b.iter(&mut runner));
26    }
27
28    group.finish();
29}
30
31pub fn bench_ifft_ref(c: &mut Criterion) {
32    let group_name: String = "ifft_ref".to_string();
33
34    let mut group = c.benchmark_group(group_name);
35
36    fn runner(m: usize) -> impl FnMut() {
37        let mut values: Vec<f64> = vec![0f64; m << 1];
38        let scale: f64 = 1.0f64 / (2 * m) as f64;
39        values.iter_mut().enumerate().for_each(|(i, x)| *x = (i + 1) as f64 * scale);
40        let table: ReimIFFTTable<f64> = ReimIFFTTable::<f64>::new(m);
41        move || {
42            ReimIFFTRef::reim_dft_execute(&table, &mut values);
43            black_box(());
44        }
45    }
46
47    for log_m in [9, 10, 11, 12, 13, 14, 15] {
48        let id: BenchmarkId = BenchmarkId::from_parameter(format!("n: {}", 2 << log_m));
49        let mut runner = runner(1 << log_m);
50        group.bench_with_input(id, &(), |b, _| b.iter(&mut runner));
51    }
52
53    group.finish();
54}
55
56criterion_group!(benches, bench_fft_ref, bench_ifft_ref,);
57
58criterion_main!(benches);