ext: Include SystemC 2.3.1 into gem5

In the past it happened several times that some changes in gem5 broke the
SystemC coupling. Recently Accelera has changed the licence for SystemC
from their own licence to Apache2.0, which is compatible with gem5.
However, SystemC usually relies on the Boost library, but I was able to
exchange the boost calls by c++11 alternatives. The recent SystemC version
is placed into /ext and is integrated into gem5's build system. The goal is
to integrate some SystemC tests for the CI in some following patches.

Change-Id: I4b66ec806b5e3cffc1d7c85d3735ff4fa5b31fd0
Reviewed-on: https://gem5-review.googlesource.com/2240
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

1 files changed, 93 insertions, 0 deletions

diff --git a/ext/systemc/src/sysc/datatypes/int/sc_nbdefs.cpp b/ext/systemc/src/sysc/datatypes/int/sc_nbdefs.cpp
new file mode 100644
index 000000000..48f2d39de
--- /dev/null
+++ b/ext/systemc/src/sysc/datatypes/int/sc_nbdefs.cpp
@@ -0,0 +1,93 @@
+/*****************************************************************************
+
+  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
+  more contributor license agreements.  See the NOTICE file distributed
+  with this work for additional information regarding copyright ownership.
+  Accellera licenses this file to you under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with the
+  License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.  See the License for the specific language governing
+  permissions and limitations under the License.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  sc_nbdefs.h -- Top level header file for arbitrary precision signed/unsigned
+                 arithmetic. This file defines all the constants needed.
+
+  Original Author: Ali Dasdan, Synopsys, Inc.
+  
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+  changes you are making here.
+
+      Name, Affiliation, Date:
+  Description of Modification:
+
+ *****************************************************************************/
+
+
+// $Log: sc_nbdefs.cpp,v $
+// Revision 1.3  2011/02/18 20:19:15  acg
+//  Andy Goodrich: updating Copyright notice.
+//
+// Revision 1.2  2009/05/22 16:06:29  acg
+//  Andy Goodrich: process control updates.
+//
+// Revision 1.1.1.1  2006/12/15 20:20:05  acg
+// SystemC 2.3
+//
+// Revision 1.3  2006/01/13 18:49:32  acg
+// Added $Log command so that CVS check in comments are reproduced in the
+// source.
+//
+
+#include "sysc/datatypes/int/sc_nbdefs.h"
+
+
+namespace sc_dt
+{
+
+#ifdef SC_MAX_NBITS
+const int MAX_NDIGITS      = DIV_CEIL(SC_MAX_NBITS) + 2;
+// Consider a number with x bits another with y bits. The maximum
+// number of bits happens when we multiply them. The result will have
+// (x + y) bits. Assume that x + y <= SC_MAX_NBITS. Then, DIV_CEIL(x) +
+// DIV_CEIL(y) <= DIV_CEIL(SC_MAX_NBITS) + 2. This is the reason for +2
+// above. With this change, MAX_NDIGITS must be enough to hold the
+// result of any operation.
+#endif
+
+// Support for the long long type. This type is not in the standard
+// but is usually supported by compilers.
+#if !defined(_WIN32) || defined(__MINGW32__)
+const uint64 UINT64_ZERO   = 0ULL;
+const uint64 UINT64_ONE    = 1ULL;
+const uint64 UINT64_32ONES = 0x00000000ffffffffULL;
+#else
+const uint64 UINT64_ZERO   = 0i64;
+const uint64 UINT64_ONE    = 1i64;
+const uint64 UINT64_32ONES = 0x00000000ffffffffi64;
+#endif
+
+const small_type NB_DEFAULT_BASE = SC_DEC;
+
+#ifndef _32BIT_
+const uint64 UINT_ZERO = UINT64_ZERO;
+const uint64 UINT_ONE  = UINT64_ONE;
+#else
+const unsigned int UINT_ZERO = 0U;
+const unsigned int UINT_ONE  = 1U;
+#endif
+
+} // namespace sc_dt