lib/audio: Replace sqrt(a*a + b*b) with hypot(a, b)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 1 insertions, 3 deletions

diff --git a/lib/igt_audio.c b/lib/igt_audio.c
index 2321d1c6..229ce6c6 100644
--- a/lib/igt_audio.c
+++ b/lib/igt_audio.c
@@ -266,9 +266,7 @@ bool audio_signal_detect(struct audio_signal *signal, int channels,
 		max = 0;
 
 		for (i = 0; i < frames / 2; i++) {
-			amplitude[i] = sqrt(data[i] * data[i] +
-					    data[frames - i] *
-					    data[frames - i]);
+			amplitude[i] = hypot(data[i], data[frames - i]);
 			if (amplitude[i] > max)
 				max = amplitude[i];
 		}