9.1 of the Intel Architecture Instruction Set Extensions Programming Reference, document 319433, version 013b, available from http://software.intel.com/en-us/avx/ The PREFETCHW bit is already supported in Linux under the name 3DNOWPREFETCH. Signed-off-by: H. Peter Anvin Link: http://lkml.kernel.org/n/tip-lgr6482ufk1bvxzvc2hr8qbp@git.kernel.org gFx