Avoid SSE2 on x86 builds.

CMakeLists.txt

@@ -24,6 +24,11 @@ endif()
 if(MSVC)
 	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MP")
 	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /MP")
+	if(MEGA_X86)
+		# This prevents usage of SSE2.
+		set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /arch:IA32")
+		set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /arch:IA32")
+	endif()
 	message(STATUS "CMAKE_CXX_FLAGS_RELEASE: ${CMAKE_CXX_FLAGS_RELEASE}")
 	message(STATUS "CMAKE_C_FLAGS_RELEASE: ${CMAKE_C_FLAGS_RELEASE}")
 endif()