target-arm: Detect tininess before rounding for FP operations

The ARM architecture mandates that we detect tininess before rounding,
so set the softfloat fp_status up appropriately.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

diff --git a/target-arm/helper.c b/target-arm/helper.c
index ce9a9d8fd25b61e1c8dd44e68ae697945ece4c7e..9172fc72799ffc2154ff117526de7219a2b010f5 100644 (file)
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -269,6 +269,10 @@ void cpu_reset(CPUARMState *env)
     set_flush_to_zero(1, &env->vfp.standard_fp_status);
     set_flush_inputs_to_zero(1, &env->vfp.standard_fp_status);
     set_default_nan_mode(1, &env->vfp.standard_fp_status);
+    set_float_detect_tininess(float_tininess_before_rounding,
+                              &env->vfp.fp_status);
+    set_float_detect_tininess(float_tininess_before_rounding,
+                              &env->vfp.standard_fp_status);
     tlb_flush(env, 1);
 }