@@ -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);
The s390x floating point unit detects tininess before rounding, so set the softfloat fp_status up appropriately. Cc: Alexander Graf <agraf@suse.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> --- target-s390x/cpu.c | 8 ++++++++ 1 file changed, 8 insertions(+)