alpha: Fix fesetexceptflag (BZ 30998)

It clears some exception flags that are outside the EXCEPTS argument.

It fixes math/test-fexcept on qemu-user.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

diff --git a/sysdeps/alpha/fpu/fsetexcptflg.c b/sysdeps/alpha/fpu/fsetexcptflg.c
index 70f3666a6ec35db0ad8034ea2977b759e5991ac1..63eb06845ddb3e93f26c7abd5a06138260ade301 100644 (file)
--- a/sysdeps/alpha/fpu/fsetexcptflg.c
+++ b/sysdeps/alpha/fpu/fsetexcptflg.c
@@ -27,7 +27,7 @@ __fesetexceptflag (const fexcept_t *flagp, int excepts)
   tmp = __ieee_get_fp_control ();
 
   /* Set all the bits that were called for.  */
-  tmp = (tmp & ~SWCR_STATUS_MASK) | (*flagp & excepts & SWCR_STATUS_MASK);
+  tmp ^= (tmp ^ *flagp) & excepts & SWCR_STATUS_MASK;
 
   /* And store it back.  */
   __ieee_set_fp_control (tmp);