target/ppc: Do not call do_float_check_status from do_fmadd

We will process flags other than in valid in helper_float_check_status,
which is invoked after the writeback to FRT.
Fixes a bug in which FRT is not written when OE/UE/XE are enabled.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211119160502.17432-21-richard.henderson@linaro.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

diff --git a/target/ppc/fpu_helper.c b/target/ppc/fpu_helper.c
index d7e0362..dd9d40f 100644 (file)
--- a/target/ppc/fpu_helper.c
+++ b/target/ppc/fpu_helper.c
@@ -699,11 +699,8 @@ static float64 do_fmadd(CPUPPCState *env, float64 a, float64 b,
     float64 ret = float64_muladd(a, b, c, madd_flags, &env->fp_status);
     int flags = get_float_exception_flags(&env->fp_status);
 
-    if (flags) {
-        if (flags & float_flag_invalid) {
-            float_invalid_op_madd(env, flags, 1, retaddr);
-        }
-        do_float_check_status(env, retaddr);
+    if (unlikely(flags & float_flag_invalid)) {
+        float_invalid_op_madd(env, flags, 1, retaddr);
     }
     return ret;
 }