diff -urN mpfr-2.4.2.orig/mpfr-longlong.h mpfr-2.4.2/mpfr-longlong.h
--- mpfr-2.4.2.orig/mpfr-longlong.h	2009-11-30 03:43:08.000000000 +0100
+++ mpfr-2.4.2/mpfr-longlong.h	2009-11-30 14:23:04.425937000 +0100
@@ -1011,10 +1011,19 @@
 #endif /* __m88000__ */
 
 #if defined (__mips) && W_TYPE_SIZE == 32
-#if __GNUC__ > 2 || __GNUC_MINOR__ >= 7
+#if __GMP_GNUC_PREREQ (4,4)
+#define umul_ppmm(w1, w0, u, v) \
+  do {									\
+    UDItype __ll = (UDItype)(u) * (v);					\
+    w1 = __ll >> 32;							\
+    w0 = __ll;								\
+  } while (0)
+#endif
+#if !defined (umul_ppmm) && __GMP_GNUC_PREREQ (2,7)
 #define umul_ppmm(w1, w0, u, v) \
   __asm__ ("multu %2,%3" : "=l" (w0), "=h" (w1) : "d" (u), "d" (v))
-#else
+#endif
+#if !defined (umul_ppmm)
 #define umul_ppmm(w1, w0, u, v) \
   __asm__ ("multu %2,%3\n\tmflo %0\n\tmfhi %1"				\
 	   : "=d" (w0), "=d" (w1) : "d" (u), "d" (v))
@@ -1024,10 +1033,20 @@
 #endif /* __mips */
 
 #if (defined (__mips) && __mips >= 3) && W_TYPE_SIZE == 64
-#if __GNUC__ > 2 || __GNUC_MINOR__ >= 7
+#if __GMP_GNUC_PREREQ (4,4)
+#define umul_ppmm(w1, w0, u, v) \
+  do {									\
+    typedef unsigned int __ll_UTItype __attribute__((mode(TI)));	\
+    __ll_UTItype __ll = (__ll_UTItype)(u) * (v);			\
+    w1 = __ll >> 64;							\
+    w0 = __ll;								\
+  } while (0)
+#endif
+#if !defined (umul_ppmm) && __GMP_GNUC_PREREQ (2,7)
 #define umul_ppmm(w1, w0, u, v) \
   __asm__ ("dmultu %2,%3" : "=l" (w0), "=h" (w1) : "d" (u), "d" (v))
-#else
+#endif
+#if !defined (umul_ppmm)
 #define umul_ppmm(w1, w0, u, v) \
   __asm__ ("dmultu %2,%3\n\tmflo %0\n\tmfhi %1"				\
 	   : "=d" (w0), "=d" (w1) : "d" (u), "d" (v))