Global register variables speed up some programs very substantially. I use an Athlon64, which has many registers beyond the usual Pentium 4 set. Is it possible to use these new registers for global register variables? If so, how do I specify them? Does anyone have experience with this? Thanks iffle -- View this message in context: http://www.nabble.com/global-register-variables-for-gcc-tf2643747.html#a7380119 Sent from the gcc - Help mailing list archive at Nabble.com.