SSE(2) support
Kernel 2.4x or patches for lower versions
Compiler GNU gcc 2.95.2 (no SSE optimization)
Portland Group compiler, -Mvect=sse
Libraries Intel Math Kernel Lib (MKL), JPEG Library, etc.
http://developer.intel.com/software/products/
Applications GNU inlining assembler (M. Lüscher)
GNU C callable NASM assembler (MILC collaboration)
C callable libraries (e.g. from Intel)