target/ppc: Set default NaN pattern explicitly

Set the default NaN pattern explicitly for ppc.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-46-peter.maydell@linaro.org

diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index eb9d7b13701400a7a5452dde8bf5fb89c1d6f3a0..1253dbf622cc733d42c49278be621ea70aa4933f 100644 (file)
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -7286,6 +7286,10 @@ static void ppc_cpu_reset_hold(Object *obj, ResetType type)
     set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->fp_status);
     set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->vec_status);
 
+    /* Default NaN: sign bit clear, set frac msb */
+    set_float_default_nan_pattern(0b01000000, &env->fp_status);
+    set_float_default_nan_pattern(0b01000000, &env->vec_status);
+
     for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
         ppc_spr_t *spr = &env->spr_cb[i];