> On Sep 26, 2018, at 8:32 AM, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > > On 2018-09-26 07:34:09 [-0700], Andy Lutomirski wrote: >>> So I *think* nobody relies on FPU-emulation anymore. I would suggest to >>> get this patch set into shape and then getting rid of >>> CONFIG_MATH_EMULATION? > > Bryan, Denys, does anyone of you rely on CONFIG_MATH_EMULATION? > The manual for Quark claims that the CPU has no FPU and yet the current > kernel (or the yocto v3.14) does not select this option. > Denys added support for some opcodes in 2015 but I didn't figure out > *why* or which CPU in particular requires this. Certainly the early Quark CPUs were, um, crappy. They had so many terrifying errata that I’m surprised anyone is willing to use them. I would *hope* that all supported Quark CPUs support FPU instructions even if they’re microcoded and run extremely slowly.
