fclearexcept() broken with xmm-instructions (latest CVS version)

[Claus-Justus Heine]

Hi,

there is a little bug in  sysdeps/i386/fpu/fclrexcpt.c, it's just a '&'<->'^' 
thing.

#############################################################################
--- sysdeps/i386/fpu/fclrexcpt.c.old    2003-08-28 13:21:45.000000000 +0200
+++ sysdeps/i386/fpu/fclrexcpt.c        2003-08-28 13:21:55.000000000 +0200
@@ -50,7 +50,7 @@
       __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc));

       /* Clear the relevant bits.  */
-      xnew_exc &= excepts ^ FE_ALL_EXCEPT;
+      xnew_exc ^= excepts ^ FE_ALL_EXCEPT;

       /* Put the new data in effect.  */
       __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc));
#############################################################################

With "&" one clears the exception-mask bits in the mxcsr which is not 
intended, the ^ will work fine because "excepts" already has all bits cleared 
which do not belong to the exception status.

Regards

Claus

--- sysdeps/i386/fpu/fclrexcpt.c.old    2003-08-28 13:21:45.000000000 +0200
+++ sysdeps/i386/fpu/fclrexcpt.c        2003-08-28 13:21:55.000000000 +0200
@@ -50,7 +50,7 @@
       __asm__ ("stmxcsr %0" : "=m" (*&xnew_exc));
       
       /* Clear the relevant bits.  */
-      xnew_exc &= excepts ^ FE_ALL_EXCEPT;
+      xnew_exc ^= excepts ^ FE_ALL_EXCEPT;
       
       /* Put the new data in effect.  */
       __asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc));