#if (defined(__SSE2__) || (_MSC_VER >= 1300 && !_M_CEE_PURE)) && !defined(OIIO_NO_SSE)
# include <xmmintrin.h>
# include <emmintrin.h>
# if defined(__SSE3__) || defined(__SSSE3__)
# if defined(__SSE3__)
# include <pmmintrin.h>
# endif
# if defined(__SSSE3__)
# include <tmmintrin.h>
# if (defined(__SSE4_1__) || defined(__SSE4_2__))