On 03/28/2018 04:46 PM, Stephen John Smoogen wrote:
Just to be clear, when other 32 bit architectures don't support it.. if this code was attempted to be compiled on arm32 the compiler complains and errors?
Generic 32-bit ARM does not have any 64-bit atomics at all. This is what I meant: You can't assume that 32-bit architectures have any form of 64-bit atomics. Making that assumption immediately makes your software non-portable.
What that means for an application that uses them on i686 is hard to tell. Some algorithms are basically impossible to implement without 64-bit atomics. Others can just use locks as a fallback, perhaps with some loss in performance.
Thanks, Florian _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
