| Message ID | 20241025141254.2141506-19-peter.maydell@linaro.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | softfloat: Set 2-NaN propagation rule in float_status, not at compile time | expand |
On 25/10/24 11:12, Peter Maydell wrote: > Set the NaN propagation rule explicitly for the float_status word > used in the microblaze target. > > This is probably 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> > --- > target/microblaze/cpu.c | 5 +++++ > fpu/softfloat-specialize.c.inc | 3 ++- > 2 files changed, 7 insertions(+), 1 deletion(-) Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
On 10/25/24 15:12, Peter Maydell wrote: > Set the NaN propagation rule explicitly for the float_status word > used in the microblaze target. > > This is probably 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> > --- > target/microblaze/cpu.c | 5 +++++ > fpu/softfloat-specialize.c.inc | 3 ++- > 2 files changed, 7 insertions(+), 1 deletion(-) Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/target/microblaze/cpu.c b/target/microblaze/cpu.c index 6329a774331..14286deead9 100644 --- a/target/microblaze/cpu.c +++ b/target/microblaze/cpu.c @@ -202,6 +202,11 @@ static void mb_cpu_reset_hold(Object *obj, ResetType type) env->pc = cpu->cfg.base_vectors; set_float_rounding_mode(float_round_nearest_even, &env->fp_status); + /* + * TODO: this is probably not the correct NaN propagation rule for + * this architecture. + */ + set_float_2nan_prop_rule(float_2nan_prop_x87, &env->fp_status); #if defined(CONFIG_USER_ONLY) /* start in user mode with interrupts enabled. */ diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index a5c3e2b8de5..40cbb1ab73b 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -406,7 +406,8 @@ static int pickNaN(FloatClass a_cls, FloatClass b_cls, || defined(TARGET_LOONGARCH64) || defined(TARGET_HPPA) \ || defined(TARGET_S390X) || defined(TARGET_PPC) || defined(TARGET_M68K) \ || defined(TARGET_SPARC) || defined(TARGET_XTENSA) \ - || defined(TARGET_I386) || defined(TARGET_ALPHA) + || defined(TARGET_I386) || defined(TARGET_ALPHA) \ + || defined(TARGET_MICROBLAZE) g_assert_not_reached(); #else rule = float_2nan_prop_x87;
Set the NaN propagation rule explicitly for the float_status word used in the microblaze target. This is probably 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> --- target/microblaze/cpu.c | 5 +++++ fpu/softfloat-specialize.c.inc | 3 ++- 2 files changed, 7 insertions(+), 1 deletion(-)