| 1488 | } |
| 1489 | |
| 1490 | AccuracyResult measure_acos() { |
| 1491 | AccuracyResult r = {}; |
| 1492 | const int N = 10; // Spot testing: 10 key points adequate for [-0.999, 0.999] range (was 50) |
| 1493 | const float lo = -0.999f; |
| 1494 | const float hi = 0.999f; |
| 1495 | float sumErr = 0; |
| 1496 | for (int i = 0; i < N; ++i) { |
| 1497 | float x = lo + (hi - lo) * i / (N - 1); |
| 1498 | float ref = fl::acosf(x); |
| 1499 | float got = s16x16::acos(s16x16(x)).to_float(); |
| 1500 | float err = fl::fabsf(got - ref); |
| 1501 | sumErr += err; |
| 1502 | if (err > r.maxErr) { r.maxErr = err; r.worstInput = x; } |
| 1503 | } |
| 1504 | r.avgErr = sumErr / N; |
| 1505 | r.nSamples = N; |
| 1506 | return r; |
| 1507 | } |
| 1508 | |
| 1509 | AccuracyResult measure_sqrt_accuracy() { |
| 1510 | AccuracyResult r = {}; |