softfloat: Use parts_pick_nan in propagateFloatx80NaN

Unpacking and repacking the parts may be slightly more work
than we did before, but we get to reuse more code.  For a
code path handling exceptional values, this is an improvement.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241203203949.483774-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
1 file changed