1 files changed, 64 insertions, 0 deletions
diff --git a/libgfortran/intrinsics/ishftc.c b/libgfortran/intrinsics/ishftc.c
new file mode 100644
index 00000000000..0bb3d422eb2
--- /dev/null
+++ b/libgfortran/intrinsics/ishftc.c
@@ -0,0 +1,64 @@
+/* Implementation of ishftc intrinsic.
+   Copyright 2002 Free Software Foundation, Inc.
+   Contributed by Paul Brook <paul@nowt.org>
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfortran is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Libgfortran 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB.  If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "libgfortran.h"
+
+#define ishftc4 prefix(ishftc4)
+GFC_INTEGER_4 ishftc4 (GFC_INTEGER_4, GFC_INTEGER_4, GFC_INTEGER_4);
+
+#define ishftc8 prefix(ishftc8)
+GFC_INTEGER_8 ishftc8 (GFC_INTEGER_8, GFC_INTEGER_8, GFC_INTEGER_8);
+
+GFC_INTEGER_4
+ishftc4 (GFC_INTEGER_4 i, GFC_INTEGER_4 shift, GFC_INTEGER_4 size)
+{
+  GFC_INTEGER_4 mask;
+  GFC_UINTEGER_4 bits;
+
+  if (shift < 0)
+    shift = shift + size;
+
+  if (shift == 0 || shift == size)
+    return i;
+
+  mask = (~(GFC_INTEGER_4)0) << size;
+  bits = i & ~mask;
+  return (i & mask) | (bits >> (size - shift)) | ((i << shift) & ~mask);
+}
+
+
+GFC_INTEGER_8
+ishftc8 (GFC_INTEGER_8 i, GFC_INTEGER_8 shift, GFC_INTEGER_8 size)
+{
+  GFC_INTEGER_8 mask;
+  GFC_UINTEGER_8 bits;
+
+  if (shift < 0)
+    shift = shift + size;
+
+  if (shift == 0 || shift == size)
+    return i;
+
+  mask = (~(GFC_INTEGER_8)0) << size;
+  bits = i & ~mask;
+  return (i & mask) | (bits >> (size - shift)) | ((i << shift) & ~mask);
+}
+