> On Sep 26, 2018, at 8:32 AM, Sebastian Andrzej Siewior
> <[email protected]> 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.
