Re: [PATCH 09/10] fpu: Don't compile-time disable hardfloat for PPC targets

[Richard Henderson <richard.henderson@linaro.org>]

On 2/17/25 04:50, Peter Maydell wrote:
> We happen to know that for the PPC target the FP status flags (and in
> particular float_flag_inexact) will always be cleared before a
> floating point operation, and so can_use_fpu() will always return
> false.  So we speed things up a little by forcing QEMU_NO_HARDFLOAT
> to true on that target.
> 
> We would like to build softfloat once for all targets; that means
> removing target-specific ifdefs.  Remove the check for TARGET_PPC;
> this won't change behaviour because can_use_fpu() will see that
> float_flag_inexact is clear and take the softfloat path anyway.
> 
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   fpu/softfloat.c | 2 --
>   1 file changed, 2 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

This makes ppc no different from the many other targets which clear out softfloat 
exception flags after every operation.


r~