On Tue, Aug 28, 2012 at 3:47 AM, Marc Glisse <marc.gli...@inria.fr> wrote: > I assume they are different enough that they can't all be abstracted > behind a nice common builtin (with default implementation in libgcc > and/or a macro advertising fast implementations of it) :-(
What is different is the way to interact with the CPU facility to get the data. That's exactly the part I abstracted out in its own function. I named it __x86_rdrand() but that's more an historic accident. I should have named it __get_random_word. Then all that needs to be done for another architecture is to provide a definition of this function. The rest can be shared. But this function needs to be arch-specific since the details really differ sufficiently.
