add atan2 host benchmark

dsp/Cargo.toml

@@ -12,7 +12,7 @@ serde = { version = "1.0", features = ["derive"], default-features = false }
 criterion = "0.3"
 
 [[bench]]
-name = "cossin"
+name = "trig"
 harness = false
 
 [features]

dsp/benches/cossin.rs

@@ -1,13 +0,0 @@
-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 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);
-criterion_main!(benches);

dsp/benches/trig.rs

@@ -0,0 +1,28 @@
+use core::f32::consts::PI;
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use dsp::trig::{atan2, cossin};
+
+fn atan2_bench(c: &mut Criterion) {
+    let xi = (10 << 16) as i32;
+    let xf = xi as f32 / i32::MAX as f32;
+
+    let yi = (-26_328 << 16) as i32;
+    let yf = yi as f32 / i32::MAX as f32;
+
+    c.bench_function("atan2(y, x)", |b| {
+        b.iter(|| atan2(black_box(yi), black_box(xi)))
+    });
+    c.bench_function("y.atan2(x)", |b| {
+        b.iter(|| black_box(yf).atan2(black_box(xf)))
+    });
+}
+
+fn cossin_bench(c: &mut Criterion) {
+    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, atan2_bench, cossin_bench);
+criterion_main!(benches);