diff --git a/.gitignore b/.gitignore
index 212e6ec..a2d9bd4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,8 @@
 *.iml
 **/msvc/Debug*
 **/msvc/Release*
+**/msvc/Tests
+**/msvc/Test Fixes
 **/msvc/*.sdf
 **/msvc/*.opensdf
 **/msvc/*.user
diff --git a/dep/cppunitlite/include/cppunitlite/Assertions.h b/dep/cppunitlite/include/cppunitlite/Assertions.h
index b191559..3974024 100644
--- a/dep/cppunitlite/include/cppunitlite/Assertions.h
+++ b/dep/cppunitlite/include/cppunitlite/Assertions.h
@@ -15,4 +15,6 @@ public:
 	static void UInt32Equals(std::string message, unsigned int expected, unsigned int actual, const char* fileName, long lineNumber);
 
 	static void CharEquals(std::string message, char expected, char actual, const char* fileName, long lineNumber);
+
+	static void DoubleEquals(std::string message, double expected, double actual, double epsilon, const char* fileName, long lineNumber);
 };
diff --git a/dep/cppunitlite/include/cppunitlite/Test.h b/dep/cppunitlite/include/cppunitlite/Test.h
index 9f18329..5b9561a 100644
--- a/dep/cppunitlite/include/cppunitlite/Test.h
+++ b/dep/cppunitlite/include/cppunitlite/Test.h
@@ -70,12 +70,8 @@ protected:
 { Assertions::CharEquals(msg,expected, actual, __FILE__, __LINE__); }
 
 
-#define DOUBLES_EQUAL(expected,actual,threshold)\
-{ double actualTemp = actual; \
-  double expectedTemp = expected; \
-  if (fabs ((expectedTemp)-(actualTemp)) > threshold) \
-{ result_.addFailure (Failure (name_, __FILE__, __LINE__, \
-StringFrom((double)expectedTemp), StringFrom((double)actualTemp))); return; } }
+#define DOUBLES_EQUAL(msg, expected,actual,threshold)\
+{ Assertions::DoubleEquals(msg,expected, actual, threshold, __FILE__, __LINE__); }
 
 
 
diff --git a/dep/cppunitlite/src/Assertions.cpp b/dep/cppunitlite/src/Assertions.cpp
index e856de7..ada346a 100644
--- a/dep/cppunitlite/src/Assertions.cpp
+++ b/dep/cppunitlite/src/Assertions.cpp
@@ -1,6 +1,7 @@
 #include "cppunitlite/Assertions.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <sstream>
 
@@ -53,4 +54,12 @@ void Assertions::CharEquals(std::string message, char expected, char actual, con
 		ss << message << " (expected '" << expected << "', got '" << actual << "')";
 		throw TestFailException(ss.str(), std::string(fileName), lineNumber);
 	}
-}
\ No newline at end of file
+}
+
+void Assertions::DoubleEquals(std::string message, double expected, double actual, double epsilon, const char* fileName, long lineNumber) {
+	if (abs(expected - actual) > epsilon) {
+		std::stringstream ss;
+		ss << message << " (expected '" << expected << "', got '" << actual << "')";
+		throw TestFailException(ss.str(), std::string(fileName), lineNumber);
+	}
+}
diff --git a/msvc/ReHLDS.sln b/msvc/ReHLDS.sln
index cf5e61d..b1aff52 100644
--- a/msvc/ReHLDS.sln
+++ b/msvc/ReHLDS.sln
@@ -30,6 +30,7 @@ Global
 		Debug|Win32 = Debug|Win32
 		Release Play|Win32 = Release Play|Win32
 		Release|Win32 = Release|Win32
+		Test Fixes|Win32 = Test Fixes|Win32
 		Tests|Win32 = Tests|Win32
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
@@ -47,6 +48,8 @@ Global
 		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Release Play|Win32.Build.0 = Release Play|Win32
 		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Release|Win32.ActiveCfg = Release|Win32
 		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Release|Win32.Build.0 = Release|Win32
+		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Test Fixes|Win32.ActiveCfg = Test Fixes|Win32
+		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Test Fixes|Win32.Build.0 = Test Fixes|Win32
 		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Tests|Win32.ActiveCfg = Tests|Win32
 		{70A2B904-B7DB-4C48-8DE0-AF567360D572}.Tests|Win32.Build.0 = Tests|Win32
 		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Debug Play|Win32.ActiveCfg = Debug|Win32
@@ -63,6 +66,8 @@ Global
 		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Release Play|Win32.Build.0 = Release|Win32
 		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Release|Win32.ActiveCfg = Release|Win32
 		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Release|Win32.Build.0 = Release|Win32
+		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Test Fixes|Win32.ActiveCfg = Debug|Win32
+		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Test Fixes|Win32.Build.0 = Debug|Win32
 		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Tests|Win32.ActiveCfg = Debug|Win32
 		{CEB94F7C-E459-4673-AABB-36E2074396C0}.Tests|Win32.Build.0 = Debug|Win32
 		{792DF067-9904-4579-99B9-46C17277ADE3}.Debug Play|Win32.ActiveCfg = Debug|Win32
@@ -79,6 +84,8 @@ Global
 		{792DF067-9904-4579-99B9-46C17277ADE3}.Release Play|Win32.Build.0 = Release|Win32
 		{792DF067-9904-4579-99B9-46C17277ADE3}.Release|Win32.ActiveCfg = Release|Win32
 		{792DF067-9904-4579-99B9-46C17277ADE3}.Release|Win32.Build.0 = Release|Win32
+		{792DF067-9904-4579-99B9-46C17277ADE3}.Test Fixes|Win32.ActiveCfg = Debug|Win32
+		{792DF067-9904-4579-99B9-46C17277ADE3}.Test Fixes|Win32.Build.0 = Debug|Win32
 		{792DF067-9904-4579-99B9-46C17277ADE3}.Tests|Win32.ActiveCfg = Debug|Win32
 		{792DF067-9904-4579-99B9-46C17277ADE3}.Tests|Win32.Build.0 = Debug|Win32
 	EndGlobalSection
diff --git a/rehlds/engine/mathlib.cpp b/rehlds/engine/mathlib.cpp
index 4e986be..72b5a1c 100644
--- a/rehlds/engine/mathlib.cpp
+++ b/rehlds/engine/mathlib.cpp
@@ -398,15 +398,15 @@ void CrossProduct(const vec_t *v1, const vec_t *v2, vec_t *cross)
 {
 #ifdef REHLDS_FIXES
 	__m128 a = _mm_loadu_ps(v1), b = _mm_loadu_ps(v2);
-	__m128 m = _mm_sub_ps(	_mm_mul_ps(b, _mm_shuffle_ps(a, a, _MM_SHUFFLE(3, 0, 2, 1))),
-							_mm_mul_ps(a, _mm_shuffle_ps(b, b, _MM_SHUFFLE(3, 0, 2, 1)))
-					);
+	__m128 tmp1 = _mm_mul_ps(a, _mm_shuffle_ps(b, b, _MM_SHUFFLE(3, 0, 2, 1)));
+	__m128 tmp2 = _mm_mul_ps(b, _mm_shuffle_ps(a, a, _MM_SHUFFLE(3, 0, 2, 1)));
+	__m128 m = _mm_sub_ps(tmp1, tmp2);
 
 	xmm2vec(cross, _mm_shuffle_ps(m, m, _MM_SHUFFLE(3, 0, 2, 1)));
 #else // REHLDS_FIXES
-	cross[0] = v2[2] * v1[1] - v1[2] * v2[1];
+	cross[0] = v1[1] * v2[2] - v1[2] * v2[1];
 	cross[1] = v1[2] * v2[0] - v1[0] * v2[2];
-	cross[2] = v1[0] * v2[1] - v2[0] * v1[1];
+	cross[2] = v1[0] * v2[1] - v1[1] * v2[0];
 #endif // REHLDS_FIXES
 }
 
diff --git a/rehlds/msvc/ReHLDS.vcxproj b/rehlds/msvc/ReHLDS.vcxproj
index 9addf4f..30d485e 100644
--- a/rehlds/msvc/ReHLDS.vcxproj
+++ b/rehlds/msvc/ReHLDS.vcxproj
@@ -29,6 +29,10 @@
       <Configuration>Release</Configuration>
       <Platform>Win32</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Test Fixes|Win32">
+      <Configuration>Test Fixes</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Tests|Win32">
       <Configuration>Tests</Configuration>
       <Platform>Win32</Platform>
@@ -91,11 +95,13 @@
     <ClCompile Include="..\engine\zone.cpp" />
     <ClCompile Include="..\hookers\6132_hooker.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds|Win32'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\hookers\hooker.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds|Win32'">true</ExcludedFromBuild>
     </ClCompile>
@@ -108,6 +114,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Record|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds|Win32'">false</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
@@ -125,6 +132,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\public\registry.cpp" />
     <ClCompile Include="..\public\rehlds\crc32.cpp">
@@ -136,6 +144,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\public\rehlds\sys_shared.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
@@ -146,6 +155,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\public\steamid.cpp" />
     <ClCompile Include="..\public\tier0\dbg.cpp" />
@@ -158,6 +168,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\public\tier0\platform_win32.cpp" />
     <ClCompile Include="..\public\utlbuffer.cpp" />
@@ -183,7 +194,9 @@
       <PrecompiledHeaderFile Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">precompiled.h</PrecompiledHeaderFile>
       <PrecompiledHeaderFile Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">precompiled.h</PrecompiledHeaderFile>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">Create</PrecompiledHeader>
       <PrecompiledHeaderFile Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">precompiled.h</PrecompiledHeaderFile>
+      <PrecompiledHeaderFile Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">precompiled.h</PrecompiledHeaderFile>
     </ClCompile>
     <ClCompile Include="..\rehlds\RehldsRuntimeConfig.cpp" />
     <ClCompile Include="..\rehlds\structSizeCheck.cpp" />
@@ -201,12 +214,20 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
     </ClCompile>
+    <ClCompile Include="..\unittests\mathlib_tests.cpp">
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Play|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Record|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds Play|Win32'">true</ExcludedFromBuild>
+    </ClCompile>
     <ClCompile Include="..\unittests\struct_offsets_tests.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Record|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">false</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">false</ExcludedFromBuild>
     </ClCompile>
     <ClCompile Include="..\unittests\TestRunner.cpp">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
@@ -469,6 +490,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Record|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
     </None>
     <None Include="..\linux\Makefile">
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
@@ -477,6 +499,7 @@
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Swds Play|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug Record|Win32'">true</ExcludedFromBuild>
       <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">true</ExcludedFromBuild>
+      <ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">true</ExcludedFromBuild>
     </None>
   </ItemGroup>
   <ItemGroup>
@@ -528,6 +551,12 @@
     <PlatformToolset>v120_xp</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v120_xp</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
@@ -563,6 +592,9 @@
   <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'" Label="PropertySheets">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
+  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'" Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
   <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
   </ImportGroup>
@@ -588,6 +620,9 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Tests|Win32'">
     <TargetName>filesystem_stdio</TargetName>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">
+    <TargetName>filesystem_stdio</TargetName>
+  </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <TargetName>filesystem_stdio</TargetName>
   </PropertyGroup>
@@ -604,7 +639,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;HOOK_ENGINE;REHLDS_FIXES;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;HOOK_ENGINE;REHLDS_FIXES;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -642,7 +677,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;REHLDS_FIXES;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;REHLDS_FIXES;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -679,7 +714,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;HOOK_ENGINE;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;HOOK_ENGINE;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -715,7 +750,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -754,7 +789,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;HOOK_ENGINE;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;HOOK_ENGINE;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
@@ -790,7 +825,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;_BUILD_FROM_IDE;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;_BUILD_FROM_IDE;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>precompiled.h</PrecompiledHeaderFile>
@@ -815,6 +850,41 @@
       <Inputs>subversion.always.run</Inputs>
     </CustomBuildStep>
   </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Test Fixes|Win32'">
+    <PreBuildEvent>
+      <Command>IF EXIST "$(ProjectDir)PreBuild.bat" (CALL "$(ProjectDir)PreBuild.bat" "$(ProjectDir)..\version\" "$(ProjectDir)..\")</Command>
+      <Message>Setup version from SVN revision</Message>
+    </PreBuildEvent>
+    <ClCompile>
+      <AdditionalIncludeDirectories>$(ProjectDir)\..\;$(ProjectDir)\..\hookers\;$(ProjectDir)\..\metamod\include\;$(ProjectDir)\..\public\rehlds\;$(ProjectDir)\..\common;$(ProjectDir)\..\engine;$(ProjectDir)\..\public;$(ProjectDir)\..\pm_shared;$(ProjectDir)\..\rehlds\;$(ProjectDir)\..\testsuite\;$(VCInstallDir)UnitTest\include;$(SolutionDir)..\dep\bzip2\include\;$(SolutionDir)..\dep\cppunitlite\include\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_FIXES;REHLDS_SELF;_BUILD_FROM_IDE;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>precompiled.h</PrecompiledHeaderFile>
+    </ClCompile>
+    <Link>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>psapi.lib;ws2_32.lib;$(ProjectDir)../lib/steam_api.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <MinimumRequiredVersion>
+      </MinimumRequiredVersion>
+      <ModuleDefinitionFile>
+      </ModuleDefinitionFile>
+      <AdditionalLibraryDirectories>$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+    </Link>
+    <PostBuildEvent>
+      <Command>copy /Y "$(ProjectDir)..\lib\steam_api.dll" "$(OutDir)"</Command>
+      <Message>Automatic deployment script</Message>
+    </PostBuildEvent>
+    <CustomBuildStep>
+      <Command>echo Empty Action</Command>
+      <Message>Force build to run Pre-Build event</Message>
+      <Outputs>subversion.always.run</Outputs>
+      <Inputs>subversion.always.run</Inputs>
+    </CustomBuildStep>
+  </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
     <PreBuildEvent>
       <Command>IF EXIST "$(ProjectDir)PreBuild.bat" (CALL "$(ProjectDir)PreBuild.bat" "$(ProjectDir)..\version\" "$(ProjectDir)..\")</Command>
@@ -827,7 +897,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;HOOK_ENGINE;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;HOOK_ENGINE;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <PrecompiledHeader>Use</PrecompiledHeader>
@@ -866,7 +936,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>REHLDS_SELF;HOOK_ENGINE;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>REHLDS_OPT_PEDANTIC;REHLDS_SELF;HOOK_ENGINE;REHLDS_CHECKS;USE_BREAKPAD_HANDLER;DEDICATED;SWDS;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
       <PrecompiledHeader>Use</PrecompiledHeader>
diff --git a/rehlds/msvc/ReHLDS.vcxproj.filters b/rehlds/msvc/ReHLDS.vcxproj.filters
index b5eb9bd..84bece4 100644
--- a/rehlds/msvc/ReHLDS.vcxproj.filters
+++ b/rehlds/msvc/ReHLDS.vcxproj.filters
@@ -322,6 +322,9 @@
     <ClCompile Include="..\engine\public_amalgamation.cpp">
       <Filter>engine</Filter>
     </ClCompile>
+    <ClCompile Include="..\unittests\mathlib_tests.cpp">
+      <Filter>unittests</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\hookers\memory.h">
diff --git a/rehlds/unittests/mathlib_tests.cpp b/rehlds/unittests/mathlib_tests.cpp
new file mode 100644
index 0000000..fbb2658
--- /dev/null
+++ b/rehlds/unittests/mathlib_tests.cpp
@@ -0,0 +1,283 @@
+#include "precompiled.h"
+#include "cppunitlite/TestHarness.h"
+
+TEST(AngleVectorsTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t angles;
+		vec3_t forward, right, up;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 21.0f, 65.0f, 162.0f }, { 0.39455f, 0.84611f, -0.35837f }, { -0.90875f, 0.30156f, -0.28849f }, { 0.13602f, -0.43949f, -0.88789f } },
+			{ { 106.0f, 142.0f, 62.0f }, { 0.21721f, -0.16970f, -0.96126f }, { 0.95785f, -0.15259f, 0.24337f }, { 0.18798f, 0.97361f, -0.12940f } }
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		vec3_t forward, right, up;
+
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			AngleVectors(testdata[i].angles, forward, right, up);
+
+			DOUBLES_EQUAL("forward[0] mismatch", testdata[i].forward[0], forward[0], 0.00001);
+			DOUBLES_EQUAL("forward[1] mismatch", testdata[i].forward[1], forward[1], 0.00001);
+			DOUBLES_EQUAL("forward[2] mismatch", testdata[i].forward[2], forward[2], 0.00001);
+
+			DOUBLES_EQUAL("right[0] mismatch", testdata[i].right[0], right[0], 0.00001);
+			DOUBLES_EQUAL("right[1] mismatch", testdata[i].right[1], right[1], 0.00001);
+			DOUBLES_EQUAL("right[2] mismatch", testdata[i].right[2], right[2], 0.00001);
+
+			DOUBLES_EQUAL("up[0] mismatch", testdata[i].up[0], up[0], 0.00001);
+			DOUBLES_EQUAL("up[1] mismatch", testdata[i].up[1], up[1], 0.00001);
+			DOUBLES_EQUAL("up[2] mismatch", testdata[i].up[2], up[2], 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(AngleVectorsTransposeTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t angles;
+		vec3_t forward, right, up;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 21.0f, 65.0f, 162.0f }, { 0.39455f, 0.90875f, 0.13602f }, { 0.84611f, -0.30157f, -0.43949f }, { -0.35837f, 0.28849f, -0.88789f } },
+			{ { 106.0f, 142.0f, 62.0f }, { 0.21721f, -0.95785f, 0.18798f }, { -0.16970f, 0.15259f, 0.97361f }, { -0.96126f, -0.24337f, -0.12940f } }
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		vec3_t forward, right, up;
+
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			AngleVectorsTranspose(testdata[i].angles, forward, right, up);
+
+			DOUBLES_EQUAL("forward[0] mismatch", testdata[i].forward[0], forward[0], 0.00001);
+			DOUBLES_EQUAL("forward[1] mismatch", testdata[i].forward[1], forward[1], 0.00001);
+			DOUBLES_EQUAL("forward[2] mismatch", testdata[i].forward[2], forward[2], 0.00001);
+
+			DOUBLES_EQUAL("right[0] mismatch", testdata[i].right[0], right[0], 0.00001);
+			DOUBLES_EQUAL("right[1] mismatch", testdata[i].right[1], right[1], 0.00001);
+			DOUBLES_EQUAL("right[2] mismatch", testdata[i].right[2], right[2], 0.00001);
+
+			DOUBLES_EQUAL("up[0] mismatch", testdata[i].up[0], up[0], 0.00001);
+			DOUBLES_EQUAL("up[1] mismatch", testdata[i].up[1], up[1], 0.00001);
+			DOUBLES_EQUAL("up[2] mismatch", testdata[i].up[2], up[2], 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(AngleMatrixTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t angles;
+		vec_t matrix0[4];
+		vec_t matrix1[4];
+		vec_t matrix2[4];
+	};
+
+	testdata_t testdata[2] = {
+			{ { 21.0f, 65.0f, 162.0f }, { 0.39455f, 0.90875f, 0.13602f, 0.0f }, { 0.84611f, -0.30157f, -0.43949f, 0.0f }, { -0.35837f, 0.28849f, -0.88789f, 0.0f } },
+			{ { 106.0f, 142.0f, 62.0f }, { 0.21721f, -0.95785f, 0.18798f, 0.0f }, { -0.16970f, 0.15259f, 0.97361f, 0.0f }, { -0.96126f, -0.24337f, -0.12940f, 0.0f } }
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		float rotationmatrix[3][4];
+
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			AngleMatrix(testdata[i].angles, rotationmatrix);
+
+			DOUBLES_EQUAL("rotationmatrix[0][0] mismatch", testdata[i].matrix0[0], rotationmatrix[0][0], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[0][1] mismatch", testdata[i].matrix0[1], rotationmatrix[0][1], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[0][2] mismatch", testdata[i].matrix0[2], rotationmatrix[0][2], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[0][3] mismatch", testdata[i].matrix0[3], rotationmatrix[0][3], 0.00001);
+
+			DOUBLES_EQUAL("rotationmatrix[1][0] mismatch", testdata[i].matrix1[0], rotationmatrix[1][0], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[1][1] mismatch", testdata[i].matrix1[1], rotationmatrix[1][1], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[1][2] mismatch", testdata[i].matrix1[2], rotationmatrix[1][2], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[1][3] mismatch", testdata[i].matrix1[3], rotationmatrix[1][3], 0.00001);
+
+			DOUBLES_EQUAL("rotationmatrix[2][0] mismatch", testdata[i].matrix2[0], rotationmatrix[2][0], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[2][1] mismatch", testdata[i].matrix2[1], rotationmatrix[2][1], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[2][2] mismatch", testdata[i].matrix2[2], rotationmatrix[2][2], 0.00001);
+			DOUBLES_EQUAL("rotationmatrix[2][3] mismatch", testdata[i].matrix2[3], rotationmatrix[2][3], 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(DotProductTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t v1;
+		vec3_t v2;
+		float res;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 41.5f, 7.32f, -9.22f }, { 13.3f, -0.5f, 8.09f }, 473.70023f },
+			{ { -16.1f, -0.09f, 1.2f }, { 8.2f, 1.2f, -6.66f }, -140.12001f },
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			double res = _DotProduct(testdata[i].v1, testdata[i].v2);
+			DOUBLES_EQUAL("_DotProduct mismatch", testdata[i].res, res, 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(CrossProductTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t v1;
+		vec3_t v2;
+		vec3_t res;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 41.5f, 7.32f, -9.22f }, { 13.3f, -0.5f, 8.09f }, { 54.60880f, -458.36102f, -118.10600f } },
+			{ { -16.1f, -0.09f, 1.2f }, { 8.2f, 1.2f, -6.66f }, { -0.84060f, -97.38600f, -18.58200f } },
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		vec3_t res;
+
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			CrossProduct(testdata[i].v1, testdata[i].v2, res);
+
+			DOUBLES_EQUAL("CrossProduct[0] mismatch", testdata[i].res[0], res[0], 0.00001);
+			DOUBLES_EQUAL("CrossProduct[1] mismatch", testdata[i].res[1], res[1], 0.00001);
+			DOUBLES_EQUAL("CrossProduct[2] mismatch", testdata[i].res[2], res[2], 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(LengthTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t v;
+		float l;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 41.5f, 7.32f, -9.22f }, 43.13746f },
+			{ { -16.1f, -0.09f, 1.2f }, 16.14491f },
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			double res = Length(testdata[i].v);
+
+			DOUBLES_EQUAL("Length mismatch", testdata[i].l, res, 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(Length2DTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t v;
+		float l;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 41.5f, 7.32f, -9.22f }, 42.14063f },
+			{ { -16.1f, -0.09f, 1.2f }, 16.10025f },
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			double res = Length2D(testdata[i].v);
+
+			DOUBLES_EQUAL("Length mismatch", testdata[i].l, res, 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(VectorNormalizeTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t vecIn;
+		vec3_t vecOut;
+		float l;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 41.5f, 7.32f, -9.22f }, { 0.96204f, 0.16969f, -0.21374f }, 43.13746f },
+			{ { -16.1f, -0.09f, 1.2f }, { -0.99722f, -0.00557f, 0.07433f }, 16.14491f },
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			vec3_t v;
+			memcpy(&v[0], &testdata[i].vecIn[0], sizeof(v));
+			double res = VectorNormalize(v);
+
+			DOUBLES_EQUAL("VectorNormalize.len mismatch", testdata[i].l, res, 0.00001);
+			DOUBLES_EQUAL("VectorNormalize[0] mismatch", testdata[i].vecOut[0], v[0], 0.00001);
+			DOUBLES_EQUAL("VectorNormalize[1] mismatch", testdata[i].vecOut[1], v[1], 0.00001);
+			DOUBLES_EQUAL("VectorNormalize[2] mismatch", testdata[i].vecOut[2], v[2], 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
+
+TEST(VectorAnglesTest, MathLib, 1000) {
+	Sys_CheckCpuInstructionsSupport();
+	CHECK("SSE4.1 Support", cpuinfo.sse4_1);
+
+	struct testdata_t {
+		vec3_t forward;
+		vec3_t angles;
+	};
+
+	testdata_t testdata[2] = {
+			{ { 0.96204f, 0.16969f, -0.21374f }, { 347.65839f, 10.00326f, 0.0f } },
+			{ { -0.99722f, -0.00557f, 0.07433f }, { 4.26272f, 180.32002f, 0.0f } },
+	};
+
+	for (int sse = 0; sse <= 1; sse++) {
+		for (int i = 0; i < ARRAYSIZE(testdata); i++) {
+			vec3_t angles;
+			VectorAngles(testdata[i].forward, angles);
+
+			DOUBLES_EQUAL("VectorAngles[0] mismatch", testdata[i].angles[0], angles[0], 0.00001);
+			DOUBLES_EQUAL("VectorAngles[1] mismatch", testdata[i].angles[1], angles[1], 0.00001);
+			DOUBLES_EQUAL("VectorAngles[2] mismatch", testdata[i].angles[2], angles[2], 0.00001);
+		}
+
+		cpuinfo.sse4_1 = 0;
+	}
+}
\ No newline at end of file