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[for-10.0,07/25] target/ppc: Set FloatInfZeroNaNRule explicitly

Message ID 20241128104310.3452934-8-peter.maydell@linaro.org
State New
Headers show
Series fpu: Make pickNaNMulAdd behaviour runtime selected | expand

Commit Message

Peter Maydell Nov. 28, 2024, 10:42 a.m. UTC 
Set the FloatInfZeroNaNRule explicitly for the PPC target,
so we can remove the ifdef from pickNaNMulAdd().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/ppc/cpu_init.c          | 7 +++++++
 fpu/softfloat-specialize.c.inc | 7 +------
 2 files changed, 8 insertions(+), 6 deletions(-)

Comments

Richard Henderson Nov. 28, 2024, 1:28 p.m. UTC | #1 
On 11/28/24 04:42, Peter Maydell wrote:
> Set the FloatInfZeroNaNRule explicitly for the PPC target,
> so we can remove the ifdef from pickNaNMulAdd().
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   target/ppc/cpu_init.c          | 7 +++++++
>   fpu/softfloat-specialize.c.inc | 7 +------
>   2 files changed, 8 insertions(+), 6 deletions(-)

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 efcb80d1c25..f18908a643a 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -7270,6 +7270,13 @@  static void ppc_cpu_reset_hold(Object *obj, ResetType type)
      */
     set_float_2nan_prop_rule(float_2nan_prop_ab, &env->fp_status);
     set_float_2nan_prop_rule(float_2nan_prop_ab, &env->vec_status);
+    /*
+     * For PPC, the (inf,zero,qnan) case sets InvalidOp, but we prefer
+     * to return an input NaN if we have one (ie c) rather than generating
+     * a default NaN
+     */
+    set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->fp_status);
+    set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->vec_status);
 
     for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
         ppc_spr_t *spr = &env->spr_cb[i];
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index db914ddbb1c..2023b2bd632 100644
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -503,18 +503,13 @@  static int pickNaNMulAdd(FloatClass a_cls, FloatClass b_cls, FloatClass c_cls,
              */
             rule = float_infzeronan_dnan_never;
         }
-#elif defined(TARGET_PPC) || defined(TARGET_SPARC) || \
+#elif defined(TARGET_SPARC) || \
     defined(TARGET_XTENSA) || defined(TARGET_HPPA) || \
     defined(TARGET_I386) || defined(TARGET_LOONGARCH)
         /*
          * For LoongArch systems that conform to IEEE754-2008, the (inf,zero,nan)
          * case sets InvalidOp and returns the input value 'c'
          */
-        /*
-         * For PPC, the (inf,zero,qnan) case sets InvalidOp, but we prefer
-         * to return an input NaN if we have one (ie c) rather than generating
-         * a default NaN
-         */
         rule = float_infzeronan_dnan_never;
 #endif
     }