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target-s390x: detect tininess before rounding for FP operations

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The s390x floating point unit detects tininess before rounding, so set
the softfloat fp_status up appropriately.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno
2015-06-05 01:37:58 +02:00
committed by Alexander Graf
parent f821135cdd
commit 4a33565f9f
1 changed files with 8 additions and 0 deletions
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target-s390x/cpu.c
+8
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@@ -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);