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move atan2 test before cossin test to mimic function order

This commit is contained in:
Matt Huszagh 2020-12-17 10:09:12 -08:00
parent 09a744f59c
commit 6ffc42021e
1 changed files with 36 additions and 36 deletions
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72
dsp/src/trig.rs
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@ -168,6 +168,42 @@ mod tests {
(PI / 2. - angle).min(angle) (PI / 2. - angle).min(angle)
} }
#[test]
fn atan2_absolute_error() {
const NUM_VALS: usize = 1_001;
let mut test_vals: [f64; NUM_VALS] = [0.; NUM_VALS];
let val_bounds: (f64, f64) = (-1., 1.);
let val_delta: f64 =
(val_bounds.1 - val_bounds.0) / (NUM_VALS - 1) as f64;
for i in 0..NUM_VALS {
test_vals[i] = val_bounds.0 + i as f64 * val_delta;
}
for &x in test_vals.iter() {
for &y in test_vals.iter() {
let atol: f64 = 4e-5;
let rtol: f64 = 0.127;
let actual = (y.atan2(x) as f64 * i16::MAX as f64).round()
/ i16::MAX as f64;
let tol = atol + rtol * angle_to_axis(actual).abs();
let computed = (atan2(
((y * i16::MAX as f64) as i32) << 16,
((x * i16::MAX as f64) as i32) << 16,
) >> 16) as f64
/ i16::MAX as f64
* PI;
if !isclose(computed, actual, 0., tol) {
println!("(x, y) : {}, {}", x, y);
println!("actual : {}", actual);
println!("computed : {}", computed);
println!("tolerance: {}\n", tol);
assert!(false);
}
}
}
}
#[test] #[test]
fn cossin_error_max_rms_all_phase() { fn cossin_error_max_rms_all_phase() {
// Constant amplitude error due to LUT data range. // Constant amplitude error due to LUT data range.
@ -236,40 +272,4 @@ mod tests {
assert!(max_err.0 < 1.1e-5); assert!(max_err.0 < 1.1e-5);
assert!(max_err.1 < 1.1e-5); assert!(max_err.1 < 1.1e-5);
} }
#[test]
fn atan2_absolute_error() {
const NUM_VALS: usize = 1_001;
let mut test_vals: [f64; NUM_VALS] = [0.; NUM_VALS];
let val_bounds: (f64, f64) = (-1., 1.);
let val_delta: f64 =
(val_bounds.1 - val_bounds.0) / (NUM_VALS - 1) as f64;
for i in 0..NUM_VALS {
test_vals[i] = val_bounds.0 + i as f64 * val_delta;
}
for &x in test_vals.iter() {
for &y in test_vals.iter() {
let atol: f64 = 4e-5;
let rtol: f64 = 0.127;
let actual = (y.atan2(x) as f64 * i16::MAX as f64).round()
/ i16::MAX as f64;
let tol = atol + rtol * angle_to_axis(actual).abs();
let computed = (atan2(
((y * i16::MAX as f64) as i32) << 16,
((x * i16::MAX as f64) as i32) << 16,
) >> 16) as f64
/ i16::MAX as f64
* PI;
if !isclose(computed, actual, 0., tol) {
println!("(x, y) : {}, {}", x, y);
println!("actual : {}", actual);
println!("computed : {}", computed);
println!("tolerance: {}\n", tol);
assert!(false);
}
}
}
}
} }