I am implementing texturing in SSE and am coming up against a lack of packed float to int conversion instructions. The only remotely useful one I can find ( _mm_cvtss_si32 ) just converts the lowest float in the vector and writes the result out. However I want to convert all four elements and retain them in the xmm register to continue operating on them. Any suggestions would be appreciated. I am quite new to SSE programming and can't help feeling I am missing something obvious.