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| author | Peter Maydell <peter.maydell@linaro.org> | 2024-11-05 10:09:57 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2024-11-05 10:09:57 +0000 |
| commit | ba6558461cb0280ad861b376cbfff4680be82570 (patch) | |
| tree | 18358d45f5b7be8f58ebae3180ea34da580a770f | |
| parent | 355e6cfb94f61214ad4f633ce568debec5a8fc0d (diff) | |
| download | qemu-ba6558461cb0280ad861b376cbfff4680be82570.zip qemu-ba6558461cb0280ad861b376cbfff4680be82570.tar.gz qemu-ba6558461cb0280ad861b376cbfff4680be82570.tar.bz2 | |
target/rx: Explicitly set 2-NaN propagation rule
Set the NaN propagation rule explicitly for the float_status word
used in the rx target.
This not the architecturally correct behaviour, but since this is a
no-behaviour-change patch, we leave a TODO note to that effect.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241025141254.2141506-21-peter.maydell@linaro.org
| -rw-r--r-- | fpu/softfloat-specialize.c.inc | 3 | ||||
| -rw-r--r-- | target/rx/cpu.c | 7 |
2 files changed, 9 insertions, 1 deletions
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index ee5c73c..254bbd6 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -407,7 +407,8 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls, || defined(TARGET_S390X) || defined(TARGET_PPC) || defined(TARGET_M68K) \ || defined(TARGET_SPARC) || defined(TARGET_XTENSA) \ || defined(TARGET_I386) || defined(TARGET_ALPHA) \ - || defined(TARGET_MICROBLAZE) || defined(TARGET_OPENRISC) + || defined(TARGET_MICROBLAZE) || defined(TARGET_OPENRISC) \ + || defined(TARGET_RX) g_assert_not_reached(); #else rule = float_2nan_prop_x87; diff --git a/target/rx/cpu.c b/target/rx/cpu.c index 36d2a6f..65a74ce 100644 --- a/target/rx/cpu.c +++ b/target/rx/cpu.c @@ -93,6 +93,13 @@ static void rx_cpu_reset_hold(Object *obj, ResetType type) env->fpsw = 0; set_flush_to_zero(1, &env->fp_status); set_flush_inputs_to_zero(1, &env->fp_status); + /* + * TODO: this is not the correct NaN propagation rule for this + * architecture. The "RX Family User's Manual: Software" table 1.6 + * defines the propagation rules as "prefer SNaN over QNaN; + * then prefer dest over source", which is float_2nan_prop_s_ab. + */ + set_float_2nan_prop_rule(float_2nan_prop_x87, &env->fp_status); } static ObjectClass *rx_cpu_class_by_name(const char *cpu_model) |