mn10300: add the MN10300/AM33 architecture to the kernel

[pandora-kernel.git] / arch / mn10300 / lib / lshrdi3.c

diff --git a/arch/mn10300/lib/lshrdi3.c b/arch/mn10300/lib/lshrdi3.c
new file mode 100644 (file)
index 0000000..e05e64e
--- /dev/null
+++ b/arch/mn10300/lib/lshrdi3.c
@@ -0,0 +1,60 @@
+/* lshrdi3.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 __lshrdi3(DItype u, word_type b)
+{
+       union DIunion w;
+       word_type bm;
+       union DIunion uu;
+
+       if (b == 0)
+               return u;
+
+       uu.ll = u;
+
+       bm = (sizeof(SItype) * BITS_PER_UNIT) - b;
+       if (bm <= 0) {
+               w.s.high = 0;
+               w.s.low = (USItype) uu.s.high >> -bm;
+       } else {
+               USItype carries = (USItype) uu.s.high << bm;
+               w.s.high = (USItype) uu.s.high >> b;
+               w.s.low = ((USItype) uu.s.low >> b) | carries;
+       }
+
+       return w.ll;
+}