target/sparc: Set Float3NaNPropRule explicitly

Set the Float3NaNPropRule explicitly for SPARC, and remove the
ifdef from pickNaNMulAdd().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-22-peter.maydell@linaro.org

diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index 8a36280df1aef858127f59b3cbec248891bb546c..c4d8d085a9883379abbc13b6196163829743e23d 100644 (file)
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -511,8 +511,6 @@ static int pickNaNMulAdd(FloatClass a_cls, FloatClass b_cls, FloatClass c_cls,
         } else {
             rule = float_3nan_prop_s_cab;
         }
-#elif defined(TARGET_SPARC)
-        rule = float_3nan_prop_s_cba;
 #elif defined(TARGET_XTENSA)
         if (status->use_first_nan) {
             rule = float_3nan_prop_abc;

diff --git a/target/sparc/cpu.c b/target/sparc/cpu.c
index 61f2d3fbf23a96330f7db4e077d5f3f332d84b1e..0f2997a85e608c823540cac2f0b83ad28a29920a 100644 (file)
--- a/target/sparc/cpu.c
+++ b/target/sparc/cpu.c
@@ -814,6 +814,8 @@ static void sparc_cpu_realizefn(DeviceState *dev, Error **errp)
      * the CPU state struct so it won't get zeroed on reset.
      */
     set_float_2nan_prop_rule(float_2nan_prop_s_ba, &env->fp_status);
+    /* For fused-multiply add, prefer SNaN over QNaN, then C->B->A */
+    set_float_3nan_prop_rule(float_3nan_prop_s_cba, &env->fp_status);
     /* For inf * 0 + NaN, return the input NaN */
     set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->fp_status);