target/alpha: Tidy helper_fp_exc_raise_s

Remove a redundant masking of ignore.  Once that's gone it is
obvious that the system-mode inner test is redundant with the
outer test.  Move the fpcr_exc_enable masking up and tidy.

No functional change.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190921043256.4575-8-richard.henderson@linaro.org>

1 files changed, 4 insertions, 11 deletions

diff --git a/target/alpha/fpu_helper.c b/target/alpha/fpu_helper.c
index 62a066d..df8b589 100644
--- a/target/alpha/fpu_helper.c
+++ b/target/alpha/fpu_helper.c
@@ -90,25 +90,18 @@ void helper_fp_exc_raise_s(CPUAlphaState *env, uint32_t ignore, uint32_t regno)
     uint32_t exc = env->error_code & ~ignore;
     if (exc) {
         env->fpcr |= exc;
-        exc &= ~ignore;
-#ifdef CONFIG_USER_ONLY
-        /*
-         * In user mode, the kernel's software handler only
-         * delivers a signal if the exception is enabled.
-         */
-        if (!(exc & env->fpcr_exc_enable)) {
-            return;
-        }
-#else
+        exc &= env->fpcr_exc_enable;
         /*
          * In system mode, the software handler gets invoked
          * for any non-ignored exception.
+         * In user mode, the kernel's software handler only
+         * delivers a signal if the exception is enabled.
          */
+#ifdef CONFIG_USER_ONLY
         if (!exc) {
             return;
         }
 #endif
-        exc &= env->fpcr_exc_enable;
         fp_exc_raise1(env, GETPC(), exc, regno, EXC_M_SWC);
     }
 }