From 1421631f26982b3046c2c48258358c5f76305d1e Mon Sep 17 00:00:00 2001
From: Vesa V <diizy@users.noreply.github.com>
Date: Sat, 29 Nov 2014 23:22:39 +0200
Subject: [PATCH] Update lmms_math.h

add fast sqrt method
---
 include/lmms_math.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/lmms_math.h b/include/lmms_math.h
index f65670a91..64e4f57ec 100644
--- a/include/lmms_math.h
+++ b/include/lmms_math.h
@@ -228,4 +228,13 @@ static inline float sqrt_neg( float val )
 }
 
 
+// fast approximation of square root
+float fastSqrt( float n )
+{
+    int i = *(int*) &n;
+    i = ( ( i - ( 1 << 23 ) ) >> 1 ) + ( 1 << 29 ); 
+    return *(float*) &i;
+}
+
+
 #endif