From f0d9497e1f31cddbb60d00b34ef72e26faf86bd9 Mon Sep 17 00:00:00 2001
From: castano <castano@95f4ed2b-212e-0410-8b90-d31948207fce>
Date: Wed, 28 Sep 2011 19:54:05 +0000
Subject: [PATCH] Add missing changes.

---
 src/nvmath/nvmath.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/nvmath/nvmath.h b/src/nvmath/nvmath.h
index aa28a84..d3ef217 100644
--- a/src/nvmath/nvmath.h
+++ b/src/nvmath/nvmath.h
@@ -251,6 +251,29 @@ namespace nv
         return floor(saturate(f) * scale + offset) / scale;
     }*/
 
+    union Float754 {
+        unsigned int raw;
+        float value;
+        struct {
+        #if NV_BIG_ENDIAN
+            unsigned int negative:1;
+            unsigned int biasedexponent:8;
+            unsigned int mantissa:23;
+        #else
+            unsigned int mantissa:23;
+            unsigned int biasedexponent:8;
+            unsigned int negative:1;
+        #endif
+        } field;
+    };
+
+    // Return the exponent of x ~ Floor(Log2(x))
+    inline int floatExponent(float x)
+    {
+        Float754 f;
+        f.value = x;
+        return (f.field.biasedexponent - 127);
+    }
 } // nv
 
 #endif // NV_MATH_H