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| author | Peter Maydell <peter.maydell@linaro.org> | 2024-11-05 10:09:56 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2024-11-05 10:09:56 +0000 |
| commit | 62d39b28ef4e7ad41a3ef3e37037615de6dfc194 (patch) | |
| tree | b20941dc26b219d2353b90243bce8e1a2ced56e5 /fpu | |
| parent | 8d988eb44cd2723a6bd31a2895bdaba48524b6e0 (diff) | |
target/i386: Set 2-NaN propagation rule explicitly
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>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241025141254.2141506-16-peter.maydell@linaro.org
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat-specialize.c.inc | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index b050c5eb04..77ebc8216f 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -405,7 +405,8 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls, || defined(TARGET_TRICORE) || defined(TARGET_ARM) || defined(TARGET_MIPS) \ || defined(TARGET_LOONGARCH64) || defined(TARGET_HPPA) \ || defined(TARGET_S390X) || defined(TARGET_PPC) || defined(TARGET_M68K) \ - || defined(TARGET_SPARC) || defined(TARGET_XTENSA) + || defined(TARGET_SPARC) || defined(TARGET_XTENSA) \ + || defined(TARGET_I386) g_assert_not_reached(); #else rule = float_2nan_prop_x87; |