1 files changed, 37 insertions, 3 deletions

diff --git a/arch/m68k/lib/muldi3.c b/arch/m68k/lib/muldi3.c
index be4f275649e3..79e928a525d0 100644
--- a/arch/m68k/lib/muldi3.c
+++ b/arch/m68k/lib/muldi3.c
@@ -1,4 +1,4 @@
-/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and
+/* muldi3.c extracted from gcc-2.7.2.3/libgcc2.c and 
                            gcc-2.7.2.3/longlong.h which is: */
 /* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
 
@@ -19,7 +19,39 @@ along with GNU CC; see the file COPYING.  If not, write to
 the Free Software Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
-#define BITS_PER_UNIT 8
+#if defined(CONFIG_M68000) || defined(CONFIG_COLDFIRE)
+
+#define SI_TYPE_SIZE 32
+#define __BITS4 (SI_TYPE_SIZE / 4)
+#define __ll_B (1L << (SI_TYPE_SIZE / 2))
+#define __ll_lowpart(t) ((USItype) (t) % __ll_B)
+#define __ll_highpart(t) ((USItype) (t) / __ll_B)
+
+#define umul_ppmm(w1, w0, u, v)                                         \
+  do {                                                                  \
+    USItype __x0, __x1, __x2, __x3;                                     \
+    USItype __ul, __vl, __uh, __vh;                                     \
+                                                                        \
+    __ul = __ll_lowpart (u);                                            \
+    __uh = __ll_highpart (u);                                           \
+    __vl = __ll_lowpart (v);                                            \
+    __vh = __ll_highpart (v);                                           \
+                                                                        \
+    __x0 = (USItype) __ul * __vl;                                       \
+    __x1 = (USItype) __ul * __vh;                                       \
+    __x2 = (USItype) __uh * __vl;                                       \
+    __x3 = (USItype) __uh * __vh;                                       \
+                                                                        \
+    __x1 += __ll_highpart (__x0);/* this can't give carry */            \
+    __x1 += __x2;               /* but this indeed can */               \
+    if (__x1 < __x2)            /* did we get it? */                    \
+      __x3 += __ll_B;           /* yes, add it in the proper pos. */    \
+                                                                        \
+    (w1) = __x3 + __ll_highpart (__x1);                                 \
+    (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0);          \
+  } while (0)
+
+#else
 
 #define umul_ppmm(w1, w0, u, v) \
   __asm__ ("mulu%.l %3,%1:%0"                                           \
@@ -28,12 +60,14 @@ Boston, MA 02111-1307, USA.  */
            : "%0" ((USItype)(u)),                                       \
              "dmi" ((USItype)(v)))
 
+#endif
+
 #define __umulsidi3(u, v) \
   ({DIunion __w;                                                        \
     umul_ppmm (__w.s.high, __w.s.low, u, v);                            \
     __w.ll; })
 
-typedef          int SItype     __attribute__ ((mode (SI)));
+typedef          int SItype     __attribute__ ((mode (SI)));
 typedef unsigned int USItype    __attribute__ ((mode (SI)));
 typedef          int DItype     __attribute__ ((mode (DI)));
 typedef int word_type __attribute__ ((mode (__word__)));