target/alpha: Set default NaN pattern explicitly

Set the default NaN pattern explicitly for the alpha target.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-40-peter.maydell@linaro.org

diff --git a/target/alpha/cpu.c b/target/alpha/cpu.c
index 5d75c941f7a34baf7056c3e6cf5d8ad1dd0a0bb7..70f67e6fd4e5d4abe1ab121d616243c31cc77d83 100644 (file)
--- a/target/alpha/cpu.c
+++ b/target/alpha/cpu.c
@@ -199,6 +199,8 @@ static void alpha_cpu_initfn(Object *obj)
      * operand in Fa. That is float_2nan_prop_ba.
      */
     set_float_2nan_prop_rule(float_2nan_prop_x87, &env->fp_status);
+    /* Default NaN: sign bit clear, msb frac bit set */
+    set_float_default_nan_pattern(0b01000000, &env->fp_status);
 #if defined(CONFIG_USER_ONLY)
     env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN;
     cpu_alpha_store_fpcr(env, (uint64_t)(FPCR_INVD | FPCR_DZED | FPCR_OVFD