From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58251) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YwfcK-00036n-AO for qemu-devel@nongnu.org; Sun, 24 May 2015 19:47:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YwfcJ-00080X-7o for qemu-devel@nongnu.org; Sun, 24 May 2015 19:47:40 -0400 Received: from hall.aurel32.net ([2001:bc8:30d7:101::1]:40623) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YwfcJ-000800-1q for qemu-devel@nongnu.org; Sun, 24 May 2015 19:47:39 -0400 From: Aurelien Jarno Date: Mon, 25 May 2015 01:47:26 +0200 Message-Id: <1432511251-22515-6-git-send-email-aurelien@aurel32.net> In-Reply-To: <1432511251-22515-1-git-send-email-aurelien@aurel32.net> References: <1432511251-22515-1-git-send-email-aurelien@aurel32.net> Subject: [Qemu-devel] [PATCH 05/10] target-s390x: detect tininess before rounding for FP operations List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexander Graf , Aurelien Jarno , Richard Henderson The s390x floating point unit detects tininess before rounding, so set the softfloat fp_status up appropriately. Cc: Alexander Graf Cc: Richard Henderson Signed-off-by: Aurelien Jarno --- 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