On Sat, Nov 10, 2018 at 04:27:29PM -0800, Nathaniel Smith wrote:
Apparently loading a sNaN into an x87 register silently converts it to a qNaN, and on Linux C compilers are allowed to do that at any point:
Thanks for finding that.
So the Debian/RH difference may just be different register allocation in two slightly different compiler versions.
The Debian box uses an ARM processor, so there's that difference too.