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, 163 insertions, 0 deletions

diff --git a/ext/systemc/src/sysc/datatypes/int/sc_signed_bitref.inc b/ext/systemc/src/sysc/datatypes/int/sc_signed_bitref.inc
new file mode 100644
index 000000000..46d347d94
--- /dev/null
+++ b/ext/systemc/src/sysc/datatypes/int/sc_signed_bitref.inc
@@ -0,0 +1,163 @@
+/*****************************************************************************
+
+  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_signed_bitref.h -- Proxy class that is declared in sc_signed.h.
+
+  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:
+
+ *****************************************************************************/
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_signed_bitref_r
+//
+//  Proxy class for sc_signed bit selection (r-value only).
+// ----------------------------------------------------------------------------
+
+// implicit conversion to uint64
+
+sc_signed_bitref_r::operator uint64 () const
+{
+    return m_obj_p->test( m_index );
+}
+
+bool
+sc_signed_bitref_r::operator ! () const
+{
+    return ( ! m_obj_p->test( m_index ) );
+}
+
+bool
+sc_signed_bitref_r::operator ~ () const
+{
+    return ( ! m_obj_p->test( m_index ) );
+}
+
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_signed_bitref
+//
+//  Proxy class for sc_signed bit selection (r-value and l-value).
+// ----------------------------------------------------------------------------
+
+// assignment operators
+
+const sc_signed_bitref&
+sc_signed_bitref::operator = ( const sc_signed_bitref_r& b )
+{
+    m_obj_p->set( m_index, (bool) b );
+    return *this;
+}
+
+const sc_signed_bitref&
+sc_signed_bitref::operator = ( const sc_signed_bitref& b )
+{
+    m_obj_p->set( m_index, (bool) b );
+    return *this;
+}
+
+const sc_signed_bitref&
+sc_signed_bitref::operator = ( bool b )
+{
+    m_obj_p->set( m_index, b );
+    return *this;
+}
+
+
+const sc_signed_bitref&
+sc_signed_bitref::operator &= ( bool b )
+{
+    if( ! b ) {
+	m_obj_p->clear( m_index );
+    }
+    return *this;
+}
+
+const sc_signed_bitref&
+sc_signed_bitref::operator |= ( bool b )
+{
+    if( b ) {
+	m_obj_p->set( m_index );
+    }
+    return *this;
+}
+
+const sc_signed_bitref&
+sc_signed_bitref::operator ^= ( bool b )
+{
+    if( b ) {
+	m_obj_p->invert( m_index );
+    }
+    return *this;
+}
+
+// #### OPTIMIZE
+void sc_signed_bitref::concat_set(int64 src, int low_i)  
+{    
+	bool value = 1 & ((low_i < 64) ? (src >> low_i) : (src >> 63));
+    m_obj_p->set(low_i, value);
+}
+
+void sc_signed_bitref::concat_set(const sc_signed& src, int low_i)
+{
+    if ( low_i < src.length() )
+        m_obj_p->set(low_i, src.test(low_i));
+    else
+        m_obj_p->set(low_i, src<0);
+}       
+
+void sc_signed_bitref::concat_set(const sc_unsigned& src, int low_i)
+{
+    if ( low_i < src.length() )
+        m_obj_p->set(low_i, src.test(low_i));
+    else
+        m_obj_p->set(low_i, 0);
+}
+
+void sc_signed_bitref::concat_set(uint64 src, int low_i)
+{
+	bool value = 1 & ((low_i < 64) ? (src >> low_i) : 0);
+    m_obj_p->set(low_i, value);
+}
+
+
+// other methods
+
+void
+sc_signed_bitref::scan( ::std::istream& is )
+{
+    bool b;
+    is >> b;
+    *this = b;
+}
+
+
+// End of file