target/ppc: Use env->fp_status in helper_compute_fprf functions

In the helper_compute_fprf functions, we pass a dummy float_status
in to the is_signaling_nan() function. This is unnecessary, because
we have convenient access to the CPU env pointer here and that
is already set up with the correct values for the snan_bit_is_one
and no_signaling_nans config settings. is_signaling_nan() doesn't
ever update the fp_status with any exception flags, so there is
no reason not to use env->fp_status here.

Use env->fp_status instead of the dummy fp_status.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-34-peter.maydell@linaro.org

diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c
index 230466a87f318d600efeeca60bcc6cf6d7faeeb5..d93cfed17b413eae3c83c837d5436cc3ff157fc1 100644 (file)
--- a/target/ppc/fpu_helper.c
+++ b/target/ppc/fpu_helper.c
@@ -155,8 +155,7 @@ void helper_compute_fprf_##tp(CPUPPCState *env, tp arg)           \
     } else if (tp##_is_infinity(arg)) {                           \
         fprf = neg ? 0x09 << FPSCR_FPRF : 0x05 << FPSCR_FPRF;     \
     } else {                                                      \
-        float_status dummy = { };  /* snan_bit_is_one = 0 */      \
-        if (tp##_is_signaling_nan(arg, &dummy)) {                 \
+        if (tp##_is_signaling_nan(arg, &env->fp_status)) {        \
             fprf = 0x00 << FPSCR_FPRF;                            \
         } else {                                                  \
             fprf = 0x11 << FPSCR_FPRF;                            \