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authorTom Rini <trini@ti.com>2013-02-04 09:07:34 -0500
committerTom Rini <trini@ti.com>2013-02-04 09:14:22 -0500
commit2d795c9621de274cb0cb8cf4af5941293f89c3be (patch)
tree726a2ee288654832876f3e81ff5f1d356e784e13 /arch/microblaze
parent10ec0f8a74a35f4b601dd1c84931962b809919bb (diff)
parent14d315b8b3e974a7f617a9b4454fc579161fb75b (diff)
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Merge branch 'master' of git://www.denx.de/git/u-boot-microblaze
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/lib/Makefile1
-rw-r--r--arch/microblaze/lib/muldi3.c91
2 files changed, 92 insertions, 0 deletions
diff --git a/arch/microblaze/lib/Makefile b/arch/microblaze/lib/Makefile
index 7730695..8d7febd 100644
--- a/arch/microblaze/lib/Makefile
+++ b/arch/microblaze/lib/Makefile
@@ -29,6 +29,7 @@ SOBJS-y +=
COBJS-y += board.o
COBJS-y += bootm.o
+COBJS-y += muldi3.o
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
diff --git a/arch/microblaze/lib/muldi3.c b/arch/microblaze/lib/muldi3.c
new file mode 100644
index 0000000..76d7590
--- /dev/null
+++ b/arch/microblaze/lib/muldi3.c
@@ -0,0 +1,91 @@
+/*
+ * U-boot - muldi3.c contains routines for mult and div
+ *
+ *
+ * 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;
+}