cossin bench: be fair to glibc
+use core::f32::consts::PI;
use criterion::{black_box, criterion_group, criterion_main, Criterion};
use dsp::trig::cossin;
fn cossin_bench(c: &mut Criterion) {
- let z = -0x7304_2531_i32;
- c.bench_function("cossin(z)", |b| b.iter(|| cossin(black_box(z))));
- c.bench_function("(z as f32).sin_cos()", |b| {
- b.iter(|| (black_box(z) as f32).sin_cos())
- });
+ let zi = -0x7304_2531_i32;
+ let zf = zi as f32 / i32::MAX as f32 * PI;
+ c.bench_function("cossin(zi)", |b| b.iter(|| cossin(black_box(zi))));
+ c.bench_function("zf.sin_cos()", |b| b.iter(|| black_box(zf).sin_cos()));
}
criterion_group!(benches, cossin_bench);
