Streaming SIMD Extensions
Intel MMX technology introduced single-instruction multiple-data (SIMD) capability into the IA-32 architecture, with the 64-bit MMX registers, 64-bit packed integer data types, and instructions that allowed SIMD operations to be performed on packed integers. SSE extensions expand the SIMD execution model by adding facilities for handling packed and scalar single-precision floating-point values contained in 128-bit registers.