diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 542f442a426..e16fcac3496 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,4 +1,12 @@
+2002-05-20  H.J. Lu  (hjl@gnu.org)
+
+	Base on suggestions from Zhang Fuxin <fxzhang@ict.ac.cn>:
+
+	* config/mips/mips.h (DFMODE_NAN): Defined.
+	(SFMODE_NAN): Likewise.
+
 2002-05-20  Dale Johannesen  <dalej@apple.com>
+
         * combine.c (cant_combine_insn_p):  Back out my
         previous patch.
 
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index e18cf2f8d33..0e65a98ba04 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -4690,3 +4690,10 @@ do									\
       }									\
   }									\
 while (0)
+
+#define DFMODE_NAN \
+	unsigned short DFbignan[4] = {0x7ff7, 0xffff, 0xffff, 0xffff}; \
+	unsigned short DFlittlenan[4] = {0xffff, 0xffff, 0xffff, 0xfff7}
+#define SFMODE_NAN \
+	unsigned short SFbignan[2] = {0x7fbf, 0xffff}; \
+	unsigned short SFlittlenan[2] = {0xffff, 0xffbf}