While a comparison between a QNaN and a number will return the number
it is not the same with a signaling NaN. In this case the SNaN will
"win" and after potentially raising an exception it will be quietened.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
fpu/softfloat.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 013b223947..6ab4b39c09 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -7684,6 +7684,7 @@ int float128_compare_quiet(float128 a, float128 b, float_status *status)
* minnum() and maxnum() functions. These are similar to the min()
* and max() functions but if one of the arguments is a QNaN and
* the other is numerical then the numerical argument is returned.
+ * SNaNs will get quietened before being returned.
* minnum() and maxnum correspond to the IEEE 754-2008 minNum()
* and maxNum() operations. min() and max() are the typical min/max
* semantics provided by many CPUs which predate that specification.
@@ -7704,11 +7705,14 @@ static inline float ## s float ## s ## _minmax(float ## s a, float ## s b, \
if (float ## s ## _is_any_nan(a) || \
float ## s ## _is_any_nan(b)) { \
if (isieee) { \
- if (float ## s ## _is_quiet_nan(a, status) && \
+ if (float ## s ## _is_signaling_nan(a, status) || \
+ float ## s ## _is_signaling_nan(b, status)) { \
+ propagateFloat ## s ## NaN(a, b, status); \
+ } else if (float ## s ## _is_quiet_nan(a, status) && \
!float ## s ##_is_any_nan(b)) { \
return b; \
} else if (float ## s ## _is_quiet_nan(b, status) && \
- !float ## s ## _is_any_nan(a)) { \
+ !float ## s ## _is_any_nan(a)) { \
return a; \
} \
} \
--
2.14.1