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-rw-r--r--target/rx/cpu.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/target/rx/cpu.c b/target/rx/cpu.c
index 65a74ce720..69ec0bc7b3 100644
--- a/target/rx/cpu.c
+++ b/target/rx/cpu.c
@@ -100,6 +100,8 @@ static void rx_cpu_reset_hold(Object *obj, ResetType type)
      * then prefer dest over source", which is float_2nan_prop_s_ab.
      */
     set_float_2nan_prop_rule(float_2nan_prop_x87, &env->fp_status);
+    /* Default NaN value: sign bit clear, set frac msb */
+    set_float_default_nan_pattern(0b01000000, &env->fp_status);
 }
 
 static ObjectClass *rx_cpu_class_by_name(const char *cpu_model)