4 files changed, 29 insertions, 12 deletions
diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h
index 692284e04b..e508c9a199 100644
--- a/indra/llmath/llmath.h
+++ b/indra/llmath/llmath.h
@@ -153,7 +153,7 @@ inline F64 llabs(const F64 a)
 
 inline S32 lltrunc( F32 f )
 {
-#if LL_WINDOWS && !defined( __INTEL_COMPILER )
+#if LL_WINDOWS && !defined( __INTEL_COMPILER ) && (ADDRESS_SIZE == 32)
 		// Avoids changing the floating point control word.
 		// Add or subtract 0.5 - epsilon and then round
 		const static U32 zpfp[] = { 0xBEFFFFFF, 0x3EFFFFFF };
@@ -179,7 +179,7 @@ inline S32 lltrunc( F64 f )
 
 inline S32 llfloor( F32 f )
 {
-#if LL_WINDOWS && !defined( __INTEL_COMPILER )
+#if LL_WINDOWS && !defined( __INTEL_COMPILER ) && (ADDRESS_SIZE == 32)
 		// Avoids changing the floating point control word.
 		// Accurate (unlike Stereopsis version) for all values between S32_MIN and S32_MAX and slightly faster than Stereopsis version.
 		// Add -(0.5 - epsilon) and then round
diff --git a/indra/llmath/llsimdmath.h b/indra/llmath/llsimdmath.h
index cebd2ace7d..54a275633f 100644
--- a/indra/llmath/llsimdmath.h
+++ b/indra/llmath/llsimdmath.h
@@ -31,7 +31,7 @@
 #error "Please include llmath.h before this file."
 #endif
 
-#if ( ( LL_DARWIN || LL_LINUX ) && !(__SSE2__) ) || ( LL_WINDOWS && ( _M_IX86_FP < 2 ) )
+#if ( ( LL_DARWIN || LL_LINUX ) && !(__SSE2__) ) || ( LL_WINDOWS && ( _M_IX86_FP < 2 && ADDRESS_SIZE == 32 ) )
 #error SSE2 not enabled. LLVector4a and related class will not compile.
 #endif
 
diff --git a/indra/llmath/tests/v4math_test.cpp b/indra/llmath/tests/v4math_test.cpp
index 191ac864df..9779dfded3 100644
--- a/indra/llmath/tests/v4math_test.cpp
+++ b/indra/llmath/tests/v4math_test.cpp
@@ -355,7 +355,8 @@ namespace tut
 		val3 = z1 + (z2 - z1)* val;
 		val4 = w1 + (w2 - w1)* val;
 		LLVector4 vec4b = lerp(vec4,vec4a,val);
-		ensure("lerp failed", ((val1 ==vec4b.mV[VX])&& (val2 ==vec4b.mV[VY]) && (val3 ==vec4b.mV[VZ])&& (val4 ==vec4b.mV[VW])));	
+		LLVector4 check(val1, val2, val3, val4);
+		ensure_equals("lerp failed", check, vec4b);
 	}
 
 	template<> template<>
diff --git a/indra/llmath/v4coloru.h b/indra/llmath/v4coloru.h
index fddad34978..704ce852d9 100644
--- a/indra/llmath/v4coloru.h
+++ b/indra/llmath/v4coloru.h
@@ -47,14 +47,7 @@ class LLColor4U
 {
 public:
 
-	union
-	{
-		U8         mV[LENGTHOFCOLOR4U];
-		U32        mAll;
-		LLColor4*  mSources;
-		LLColor4U* mSourcesU;
-	};
-
+	U8 mV[LENGTHOFCOLOR4U];
 
 	LLColor4U();						// Initializes LLColor4U to (0, 0, 0, 1)
 	LLColor4U(U8 r, U8 g, U8 b);		// Initializes LLColor4U to (r, g, b, 1)
@@ -132,6 +125,9 @@ public:
 		return LLColor4(*this);
 	}
 
+	U32 asRGBA() const;
+	void fromRGBA( U32 aVal );
+
 	static LLColor4U white;
 	static LLColor4U black;
 	static LLColor4U red;
@@ -565,6 +561,26 @@ void LLColor4U::setVecScaleClamp(const LLColor3& color)
 	mV[3] = 255;
 }
 
+inline U32 LLColor4U::asRGBA() const
+{
+	// Little endian: values are swapped in memory. The original code access the array like a U32, so we need to swap here
+
+	return (mV[3] << 24) | (mV[2] << 16) | (mV[1] << 8) | mV[0];
+}
+
+inline void LLColor4U::fromRGBA( U32 aVal )
+{
+	// Little endian: values are swapped in memory. The original code access the array like a U32, so we need to swap here
+
+	mV[ 0 ] = aVal & 0xFF;
+	aVal >>= 8;
+	mV[ 1 ] = aVal & 0xFF;
+	aVal >>= 8;
+	mV[ 2 ] = aVal & 0xFF;
+	aVal >>= 8;
+	mV[ 3 ] = aVal & 0xFF;
+}
+
 
 #endif