http://sourceware.org/ml/libc-alpha/2002-10/msg00392.html

--- ports/sysdeps/mips/fpu_control.h
+++ ports/sysdeps/mips/fpu_control.h
@@ -74,7 +74,7 @@
 #define _FPU_RC_UP      0x2
 #define _FPU_RC_DOWN    0x3
 
-#define _FPU_RESERVED 0xfe3c0000  /* Reserved bits in cw */
+#define _FPU_RESERVED 0xfebc0000  /* Reserved bits in cw */
 
 
 /* The fdlibm code requires strict IEEE double precision arithmetic,