This behavior is currently hard-coded in parts_silence_nan,
but setting this bit properly will allow this to be cleaned up.
Reviewed-by: Alex Bennée <alex.ben...@linaro.org>
Reviewed-by: David Hildenbrand <da...@redhat.com>
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
target/mips/fpu_helper.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/target/mips/fpu_helper.h b/target/mips/fpu_helper.h
index 1c2d6d35a7..ad1116e8c1 100644
--- a/target/mips/fpu_helper.h
+++ b/target/mips/fpu_helper.h
@@ -27,8 +27,14 @@ static inline void restore_flush_mode(CPUMIPSState *env)
static inline void restore_snan_bit_mode(CPUMIPSState *env)
{
- set_snan_bit_is_one((env->active_fpu.fcr31 & (1 << FCR31_NAN2008)) == 0,
- &env->active_fpu.fp_status);
+ bool nan2008 = env->active_fpu.fcr31 & (1 << FCR31_NAN2008);
+
+ /*
+ * With nan2008, SNaNs are silenced in the usual way.
+ * Before that, SNaNs are not silenced; default nans are produced.
+ */
+ set_snan_bit_is_one(!nan2008, &env->active_fpu.fp_status);
+ set_default_nan_mode(!nan2008, &env->active_fpu.fp_status);
}
static inline void restore_fp_status(CPUMIPSState *env)
--
2.25.1
