From c848ae14f2ef214be1d80600776ba1712196f0bf Mon Sep 17 00:00:00 2001
From: Ahmet Inan <inan@aicodix.de>
Date: Wed, 3 Apr 2019 20:04:19 +0200
Subject: [PATCH] replaced pow(x, 2) with sqr(x)

---
 window.hh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/window.hh b/window.hh
index bd9364c..65e4cb1 100644
--- a/window.hh
+++ b/window.hh
@@ -104,11 +104,15 @@ class Kaiser
 		}
 		return sum();
 	}
+	static TYPE sqr(TYPE x)
+	{
+		return x * x;
+	}
 public:
 	Kaiser(TYPE a) : a(a) {}
 	TYPE operator () (int n, int N)
 	{
-		return i0(Const<TYPE>::Pi() * a * sqrt(TYPE(1) - pow(TYPE(2 * n) / TYPE(N - 1) - TYPE(1), TYPE(2)))) / i0(Const<TYPE>::Pi() * a);
+		return i0(Const<TYPE>::Pi() * a * sqrt(TYPE(1) - sqr(TYPE(2 * n) / TYPE(N - 1) - TYPE(1)))) / i0(Const<TYPE>::Pi() * a);
 	}
 };