1 files changed, 113 insertions, 0 deletions
diff --git a/libgcc/config/msp430/lib2shift.c b/libgcc/config/msp430/lib2shift.c
new file mode 100644
index 00000000000..53d7eaec682
--- /dev/null
+++ b/libgcc/config/msp430/lib2shift.c
@@ -0,0 +1,113 @@
+/* Shift functions for the GCC support library for the MSP430
+   Copyright (C) 2011 Free Software Foundation, Inc.
+   Contributed by Red Hat.
+
+   This file is part of GCC.
+
+   GCC 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 3, or (at your option)
+   any later version.
+
+   GCC 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.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+typedef          int  sint32_type   __attribute__ ((mode (SI)));
+typedef unsigned int  uint32_type   __attribute__ ((mode (SI)));
+typedef          int  sint16_type   __attribute__ ((mode (HI)));
+typedef unsigned int  uint16_type   __attribute__ ((mode (HI)));
+
+uint32_type __ashlsi3 (uint32_type in, char bit);
+sint32_type __ashrsi3 (sint32_type in, char bit);
+int __clrsbhi2 (sint16_type x);
+extern int __clrsbsi2 (sint32_type x);
+
+typedef struct
+{
+  union
+  {
+    uint32_type u;
+    uint16_type h[2];
+  } u;
+} dd;
+
+uint32_type
+__ashlsi3 (uint32_type in, char bit)
+{
+  uint16_type h, l;
+  dd d;
+
+  if (bit > 32)
+    return 0;
+  if (bit < 0)
+    return in;
+
+  d.u.u = in;
+  h = d.u.h[1];
+  l = d.u.h[0];
+
+  if (bit > 15)
+    {
+      h = l;
+      l = 0;
+      bit -= 16;
+    }
+
+  while (bit)
+    {
+      h = (h << 1) | (l >> 15);
+      l <<= 1;
+      bit --;
+    }
+
+  d.u.h[1] = h;
+  d.u.h[0] = l;
+  return d.u.u;
+}
+
+sint32_type
+__ashrsi3 (sint32_type in, char bit)
+{
+  sint16_type h;
+  uint16_type l;
+  dd d;
+
+  if (bit > 32)
+    return 0;
+  if (bit < 0)
+    return in;
+
+  d.u.u = in;
+  h = d.u.h[1];
+  l = d.u.h[0];
+
+  while (bit)
+    {
+      l = (h << 15) | (l >> 1);
+      h >>= 1;
+      bit --;
+    }
+
+  d.u.h[1] = h;
+  d.u.h[0] = l;
+  return d.u.u;
+}
+
+int
+__clrsbhi2 (sint16_type x)
+{
+  if (x == 0)
+    return 15;
+  return __clrsbsi2 ((sint32_type) x) - 16;
+}