>>>>> "Paolo" == Paolo Bonzini <pbonz...@redhat.com> writes:
Paolo> Il 23/04/2012 22:54, Peter Chubb ha scritto: Peter> What is this calculation supposed to do? It doesn't convert a Peter> 10-bit signed twos-complement number into an int32_t, unless Peter> I'm confused... Also, it's a rather opaque way to write "mfn &= Peter> 0x200;". >> >> I'll use a different way to calculate. Maybe: >> mfn <<= (32-10); >> mfn >= (32-10); Paolo> The magic that you wanted is Paolo> mfn |= -(mfn & 0x200); Yes. I'd actually been thinking of mfn -= 2 * (mfn & 0x200); but forgot the 2*. But the shifts should be faster, and that's wjhat I'm testing at the moment. Peter C -- Dr Peter Chubb peter.chubb AT nicta.com.au http://www.ssrg.nicta.com.au Software Systems Research Group/NICTA
