From 50c472c24216ad0c3890cb8bb9cf638e75642f0c Mon Sep 17 00:00:00 2001
From: Richard Linden <none@none>
Date: Tue, 23 Jul 2013 18:47:16 -0700
Subject: renamed mVarianceSum to mSumOfSquares to be more clear fixed
 normalization assertions to work with megaprims added is_zero() utility
 function fixed unit declarations to be more clear fixed texture cache hit
 rate always being 0

---
 indra/llmath/llmath.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'indra/llmath')

diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h
index cad2461e9c..eeb5cd3ee6 100755
--- a/indra/llmath/llmath.h
+++ b/indra/llmath/llmath.h
@@ -113,6 +113,12 @@ inline bool is_approx_zero( F32 f ) { return (-F_APPROXIMATELY_ZERO < f) && (f <
 // WARNING: Infinity is comparable with F32_MAX and negative 
 // infinity is comparable with F32_MIN
 
+// handles negative and positive zeros
+inline bool is_zero(F32 x)
+{
+	return (*(U32*)(&x) & 0x7fffffff) == 0;
+}
+
 inline bool is_approx_equal(F32 x, F32 y)
 {
 	const S32 COMPARE_MANTISSA_UP_TO_BIT = 0x02;
-- 
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