Re: [PATCH 15/21] target/i386: Set 2-NaN propagation rule explicitly

[Richard Henderson]

On 10/25/24 15:12, Peter Maydell wrote:
> Set the NaN propagation rule explicitly for the float_status words
> used in the x86 target.
>
> This is a no-behaviour-change commit, so we retain the existing
> behaviour of using the x87-style "prefer QNaN over SNaN, then prefer
> the NaN with the larger significand" for MMX and SSE.  This is
> however not the documented hardware behaviour, so we leave a TODO
> note about what we should be doing instead.
>
> Signed-off-by: Peter Maydell<peter.maydell@linaro.org>
> ---
>   target/i386/cpu.h              |  3 +++
>   target/i386/cpu.c              |  4 ++++
>   target/i386/tcg/fpu_helper.c   | 40 ++++++++++++++++++++++++++++++++++
>   fpu/softfloat-specialize.c.inc |  3 ++-
>   4 files changed, 49 insertions(+), 1 deletion(-)

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

r~