1 files changed, 61 insertions, 0 deletions

diff --git a/arch/mn10300/lib/ashrdi3.c b/arch/mn10300/lib/ashrdi3.c
new file mode 100644
index 000000000000..c54f61ddf0b5
--- /dev/null
+++ b/arch/mn10300/lib/ashrdi3.c
@@ -0,0 +1,61 @@
+/* ashrdi3.c extracted from gcc-2.7.2/libgcc2.c which is: */
+/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public Licence as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC 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 Licence for more details.
+
+You should have received a copy of the GNU General Public Licence
+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
+
+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__)));
+
+struct DIstruct {
+        SItype low;
+        SItype high;
+};
+
+union DIunion {
+        struct DIstruct s;
+        DItype          ll;
+};
+
+DItype __ashrdi3(DItype u, word_type b)
+{
+        union DIunion w;
+        union DIunion uu;
+        word_type bm;
+
+        if (b == 0)
+                return u;
+
+        uu.ll = u;
+
+        bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
+        if (bm <= 0) {
+                /* w.s.high = 1..1 or 0..0 */
+                w.s.high = uu.s.high >> (sizeof(SItype) * BITS_PER_UNIT - 1);
+                w.s.low = uu.s.high >> -bm;
+        } else {
+                USItype carries = (USItype)uu.s.high << bm;
+                w.s.high = uu.s.high >> b;
+                w.s.low = ((USItype)uu.s.low >> b) | carries;
+        }
+
+        return w.ll;
+}