On processors that do not support SSE2 instructions but do support MMX Technology, you can use the sse2mmx.h emulation pack to enable support for SSE2 instructions. You can use the sse2mmx.h header file for the following processors:
Intel® Itanium® processor
Intel® Pentium® III processor
Intel® Pentium® II processor
Intel® Pentium® processors with MMX™ Technology