1 files changed, 92 insertions, 0 deletions
diff --git a/arch/blackfin/lib/muldi3.c b/arch/blackfin/lib/muldi3.c
new file mode 100644
index 0000000..bf1ca53
--- /dev/null
+++ b/arch/blackfin/lib/muldi3.c
@@ -0,0 +1,92 @@
+/*
+ * U-boot - muldi3.c contains routines for mult and div
+ *
+ * Copyright (c) 2005-2007 Analog Devices Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+/* Generic function got from GNU gcc package, libgcc2.c */
+#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;
+
+DItype __muldi3(DItype u, DItype v)
+{
+	DIunion w;
+	DIunion uu, vv;
+
+	uu.ll = u, vv.ll = v;
+	/*  panic("kernel panic for __muldi3"); */
+	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;
+}