The s390x floating point unit detects tininess before rounding, so set
the softfloat fp_status up appropriately.
Cc: Alexander Graf <ag...@suse.de>
Cc: Richard Henderson <r...@twiddle.net>
Signed-off-by: Aurelien Jarno <aurel...@aurel32.net>
---
target-s390x/cpu.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c
index d2f9836..7f17823 100644
--- a/target-s390x/cpu.c
+++ b/target-s390x/cpu.c
@@ -118,6 +118,10 @@ static void s390_cpu_initial_reset(CPUState *s)
env->pfault_token = -1UL;
+ /* tininess for underflow is detected before rounding */
+ set_float_detect_tininess(float_tininess_before_rounding,
+ &env->fpu_status);
+
/* Reset state inside the kernel that we cannot access yet from QEMU. */
if (kvm_enabled()) {
kvm_s390_reset_vcpu(cpu);
@@ -143,6 +147,10 @@ static void s390_cpu_full_reset(CPUState *s)
env->pfault_token = -1UL;
+ /* tininess for underflow is detected before rounding */
+ set_float_detect_tininess(float_tininess_before_rounding,
+ &env->fpu_status);
+
/* Reset state inside the kernel that we cannot access yet from QEMU. */
if (kvm_enabled()) {
kvm_s390_reset_vcpu(cpu);
--
2.1.4
