Paolo Bonzini <pbonz...@redhat.com> writes: > On 21/03/2016 10:35, Peter Maydell wrote: >> > x86 can actually do 64-bit atomic loads and stores through the FPU, but >> > I'm not sure about other 32-bit targets? >> >> As I say, ppc32 linux is one that can't -- see commit 8a5956ad6392f1155 >> for last time this came up. > > Yes, I remember that. Loads and stores are different from RMW > operations, though. > >> Ideally we should put a compile-time assert in the atomic ops that >> the data being operated on isn't larger than sizeof(void*) so that >> this is a compile time error on all 32-bit hosts rather than just >> a small subset of them. > > Yes, I will do it if Alex doesn't beat me to it.
I'm working on it now. - fix build failures on 32bit hosts (Linux/BSD) - add compile-time assert for sizeof <= sizeof (void*) Anything else? > > Paolo -- Alex Bennée
