Re: [Qemu-arm] [Qemu-devel] [PATCH] fpu/softfloat: use hardware sqrt if we can (EXPERIMENT!)

[Emilio G. Cota]

On Tue, Feb 20, 2018 at 21:01:37 +0000, Alex Bennée wrote:
> This is an attempt to save some of the cost of sqrt by using the
> inbuilt support of the host hardware. The idea is assuming we start
> with a valid input we can use the hardware. If any tininess issues
> occur this will trip and FPU exception where:
> 
>   - we turn off cpu->use_host_fpu
>   - mask the FPU exceptions
>   - return to what we were doing

Please see this thread for an alternative approach:

  [Qemu-devel] [PATCH v1 00/14] fp-test + hostfloat
  https://lists.gnu.org/archive/html/qemu-devel/2018-03/msg05908.html

                Emilio