On Fri, Sep 11, 2020 at 4:36 PM Janne Blomqvist <blomqvist.ja...@gmail.com> wrote:
> On Fri, Sep 11, 2020 at 6:52 PM Joel Sherrill <j...@rtems.org> wrote: > > > > Hi > > > > Over at RTEMS, we ran into a case where the C++ atomics may not be right > > for one of the lower level x86 models. We will investigate whether it can > > be made right but this has led to the discussion of dropping older models > > and setting a new minimum model. Right now, our base is a i386 w/FPU. The > > best rationale we have for selecting a new floor is GCC atomics support. > > > > With that in mind, what's the lowest/oldest i386 CPU model we > > should consider as the new base model? > > We sort-of discussed this issue back when the Linux kernel dropped > support for i386. See thread starting at > https://gcc.gnu.org/legacy-ml/gcc/2012-12/msg00079.html (a thread > where you participated as well) > Wow time flies! That was eight years ago and Dr Dewar was still alive. :( I guess the embedded x86 side has started to hit the wall also. Looks like we should move to at least the i486 has a baseline. Thanks. --joel > > > > -- > Janne Blomqvist >
