target/i386: Set Float3NaNPropRule explicitly

Set the Float3NaNPropRule explicitly for i386.  We had no
i386-specific behaviour in the old ifdef ladder, so we were using the
default "prefer a then b then c" fallback; this is actually the
correct per-the-spec handling for i386.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-25-peter.maydell@linaro.org

diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c
index 3295753e075eda51b6a3e4ed841774ade2794d33..4303b3356aa92708232365af96cc228c6110420c 100644 (file)
--- a/target/i386/tcg/fpu_helper.c
+++ b/target/i386/tcg/fpu_helper.c
@@ -180,6 +180,7 @@ void cpu_init_fp_statuses(CPUX86State *env)
      * there are multiple input NaNs they are selected in the order a, b, c.
      */
     set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->sse_status);
+    set_float_3nan_prop_rule(float_3nan_prop_abc, &env->sse_status);
 }
 
 static inline uint8_t save_exception_flags(CPUX86State *env)