Re: [PATCH 03/21] target/arm: Explicitly set 2-NaN propagation rule

[Richard Henderson]

On 10/25/24 15:12, Peter Maydell wrote:
> Set the 2-NaN propagation rule explicitly in the float_status words
> we use.  We wrap this plus the pre-existing setting of the
> tininess-before-rounding flag in a new function
> arm_set_default_fp_behaviours() to avoid repetition, since we have a
> lot of float_status words at this point.
>
> The situation with FPA11 emulation in linux-user is a little odd, and
> arguably "correct" behaviour there would be to exactly match a real
> Linux kernel's FPA11 emulation.  However FPA11 emulation is
> essentially dead at this point and so it seems better to continue
> with QEMU's current behaviour and leave a comment describing the
> situation.
>
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   linux-user/arm/nwfpe/fpa11.c   | 18 ++++++++++++++++++
>   target/arm/cpu.c               | 25 +++++++++++++++++--------
>   fpu/softfloat-specialize.c.inc | 13 ++-----------
>   3 files changed, 37 insertions(+), 19 deletions(-)

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

r~