[patches] Fix MIPS feupdateenv miscompilation

["Joseph S. Myers" <joseph@xxxxxxxxxxxxxxxx>]

I observed test-fenv failing for MIPS because feupdateenv had been 
miscompiled to move the _FPU_GETCW call after that to fesetenv.  I've 
applied this patch to trunk and 2.8 branch to fix this by marking the 
relevant asms volatile

Index: ports/sysdeps/mips/fpu_control.h
===================================================================
--- ports/sysdeps/mips/fpu_control.h	(revision 6605)
+++ ports/sysdeps/mips/fpu_control.h	(working copy)
@@ -100,8 +100,8 @@
 typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
 
 /* Macros for accessing the hardware control word.  */
-#define _FPU_GETCW(cw) __asm__ ("cfc1 %0,$31" : "=r" (cw))
-#define _FPU_SETCW(cw) __asm__ ("ctc1 %0,$31" : : "r" (cw))
+#define _FPU_GETCW(cw) __asm__ volatile ("cfc1 %0,$31" : "=r" (cw))
+#define _FPU_SETCW(cw) __asm__ volatile ("ctc1 %0,$31" : : "r" (cw))
 
 /* Default control word set at startup.  */
 extern fpu_control_t __fpu_control;
Index: ports/ChangeLog.eglibc
===================================================================
--- ports/ChangeLog.eglibc	(revision 6605)
+++ ports/ChangeLog.eglibc	(working copy)
@@ -1,3 +1,8 @@
+2008-07-22  Joseph Myers  <joseph@xxxxxxxxxxxxxxxx>
+
+	* sysdeps/mips/fpu_control.h (_FPU_GETCW, _FPU_SETCW): Make asms
+	volatile.
+
 2008-07-16  Joseph Myers  <joseph@xxxxxxxxxxxxxxxx>
 
 	* sysdeps/mips/bits/setjmp.h (__jmp_buf): Give name to structure

-- 
Joseph S. Myers
joseph@xxxxxxxxxxxxxxxx