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[v2,for-10.0,45/54] target/ppc: Set default NaN pattern explicitly

Message ID 20241202131347.498124-46-peter.maydell@linaro.org (mailing list archive)
State New
Headers show
Series fpu: Remove pickNaNMulAdd, default-NaN ifdefs | expand

Commit Message

Peter Maydell Dec. 2, 2024, 1:13 p.m. UTC 
Set the default NaN pattern explicitly for ppc.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/ppc/cpu_init.c | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Richard Henderson Dec. 2, 2024, 5:34 p.m. UTC | #1 
On 12/2/24 07:13, Peter Maydell wrote:
> Set the default NaN pattern explicitly for ppc.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   target/ppc/cpu_init.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
> index eb9d7b13701..1253dbf622c 100644
> --- 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];
>   

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index eb9d7b13701..1253dbf622c 100644
--- 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];