1 files changed, 99 insertions, 0 deletions
diff --git a/arch/blackfin/lib/muldi3.c b/arch/blackfin/lib/muldi3.c
new file mode 100644
index 000000000000..303d0c6a6dba
--- /dev/null
+++ b/arch/blackfin/lib/muldi3.c
@@ -0,0 +1,99 @@
+/*
+ * File:         arch/blackfin/lib/muldi3.c
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef SI_TYPE_SIZE
+#define SI_TYPE_SIZE 32
+#endif
+#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 BITS_PER_UNIT 8
+
+#if !defined(umul_ppmm)
+#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)
+#endif
+
+#if !defined(__umulsidi3)
+#define __umulsidi3(u, v) 						\
+  ({diunion __w;                                                        \
+       umul_ppmm (__w.s.high, __w.s.low, u, v);                         \
+           __w.ll; })
+#endif
+
+typedef unsigned int usitype __attribute__ ((mode(SI)));
+typedef int sitype __attribute__ ((mode(SI)));
+typedef int ditype __attribute__ ((mode(DI)));
+typedef int word_type __attribute__ ((mode(__word__)));
+
+struct distruct {
+	sitype low, high;
+};
+typedef union {
+	struct distruct s;
+	ditype ll;
+} diunion;
+
+#ifdef CONFIG_ARITHMETIC_OPS_L1
+ditype __muldi3(ditype u, ditype v)__attribute__((l1_text));
+#endif
+
+ditype __muldi3(ditype u, ditype v)
+{
+	diunion w;
+	diunion uu, vv;
+
+	uu.ll = u, vv.ll = v;
+	w.ll = __umulsidi3(uu.s.low, vv.s.low);
+	w.s.high += ((usitype) uu.s.low * (usitype) vv.s.high
+		     + (usitype) uu.s.high * (usitype) vv.s.low);
+
+	return w.ll;
+}