systemc: Add the Accellera implementation for the data type classes.

These files have been cleaned up style wise, and some macros have been
resolved like they were for the header files.

Change-Id: I447e5311961036847e7da0c5a86c0da25a633010
Reviewed-on: https://gem5-review.googlesource.com/10844
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 231 insertions, 0 deletions

diff --git a/src/systemc/dt/bit/sc_bv_base.cc b/src/systemc/dt/bit/sc_bv_base.cc
new file mode 100644
index 000000000..84265af8d
--- /dev/null
+++ b/src/systemc/dt/bit/sc_bv_base.cc
@@ -0,0 +1,231 @@
+/*****************************************************************************
+
+  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_bv_base.cpp -- Arbitrary size bit vector class.
+
+  Original Author: Gene Bushuyev, Synopsys, Inc.
+
+ *****************************************************************************/
+
+/*****************************************************************************
+
+  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
+  changes you are making here.
+
+      Name, Affiliation, Date:
+  Description of Modification:
+
+ *****************************************************************************/
+
+
+// $Log: sc_bv_base.cpp,v $
+// Revision 1.2  2011/08/24 22:05:40  acg
+//  Torsten Maehne: initialization changes to remove warnings.
+//
+// Revision 1.1.1.1  2006/12/15 20:20:04  acg
+// SystemC 2.3
+//
+// Revision 1.4  2006/04/11 23:12:26  acg
+//   Andy Goodrich: Fixed bug in parsing of extended string constants like
+//   0bus1110011.
+//
+// Revision 1.3  2006/01/13 18:53:53  acg
+// Andy Goodrich: added $Log command so that CVS comments are reproduced in
+// the source.
+//
+
+#include <cstring>
+#include <sstream>
+
+#include "systemc/ext/dt/bit/sc_bv_base.hh"
+#include "systemc/ext/dt/fx/sc_fix.hh"
+#include "systemc/ext/dt/fx/sc_ufix.hh"
+#include "systemc/ext/utils/sc_report.hh"
+
+namespace sc_dt
+{
+
+// ----------------------------------------------------------------------------
+//  CLASS : sc_bv_base
+//
+//  Arbitrary size bit vector base class.
+// ----------------------------------------------------------------------------
+
+void
+sc_bv_base::init(int length_, bool init_value)
+{
+    // check the length
+    if (length_ <= 0) {
+        SC_REPORT_ERROR("zero length", 0);
+        sc_core::sc_abort(); // can't recover from here
+    }
+    // allocate memory for the data and control words
+    m_len = length_;
+    m_size = (m_len - 1) / SC_DIGIT_SIZE + 1;
+    m_data = new sc_digit[m_size];
+    // initialize the bits to 'init_value'
+    sc_digit dw = init_value ? ~SC_DIGIT_ZERO : SC_DIGIT_ZERO;
+    int sz = m_size;
+    for (int i = 0; i < sz; ++i) {
+        m_data[i] = dw;
+    }
+    clean_tail();
+}
+
+void
+sc_bv_base::assign_from_string(const std::string &s)
+{
+    // s must have been converted to bin
+    int len = m_len;
+    int s_len = s.length() - 1;
+    int min_len = sc_min(len, s_len);
+    int i = 0;
+    for (; i < min_len; ++i) {
+        char c = s[s_len - i - 1];
+        if (c != '0' && c != '1') {
+            SC_REPORT_ERROR("cannot perform conversion",
+                "string can contain only '0' and '1' characters");
+            // may continue, if suppressed
+            c = '0';
+        }
+        set_bit(i, sc_logic_value_t(c - '0'));
+    }
+    // if formatted, fill the rest with sign(s), otherwise fill with zeros
+    sc_logic_value_t fill = (s[s_len] == 'F' ? sc_logic_value_t(s[0] - '0')
+                                             : sc_logic_value_t(0));
+    for (; i < len; ++i) {
+        set_bit(i, fill);
+    }
+}
+
+// constructors
+sc_bv_base::sc_bv_base(const char *a) : m_len(0), m_size(0), m_data(0)
+{
+    std::string s = convert_to_bin(a);
+    init(s.length() - 1);
+    assign_from_string(s);
+}
+
+sc_bv_base::sc_bv_base(const char *a, int length_) :
+    m_len(0), m_size(0), m_data(0)
+{
+    init(length_);
+    assign_from_string(convert_to_bin(a));
+}
+
+sc_bv_base::sc_bv_base(const sc_bv_base &a) :
+    sc_proxy<sc_bv_base>(), m_len(a.m_len), m_size(a.m_size),
+    m_data(new sc_digit[m_size])
+{
+    // copy the bits
+    int sz = m_size;
+    for (int i = 0; i < sz; ++i) {
+        m_data[i] = a.m_data[i];
+    }
+}
+
+// assignment operators
+sc_bv_base &
+sc_bv_base::operator = (const char *a)
+{
+    assign_from_string(convert_to_bin(a));
+    return *this;
+}
+
+
+// ----------------------------------------------------------------------------
+// convert formatted string to binary string
+
+const std::string
+convert_to_bin(const char *s)
+{
+    // Beware: logic character strings cannot start with '0x' or '0X',
+    //         because this is seen as a hexadecimal encoding prefix!
+
+    if (s == 0) {
+        SC_REPORT_ERROR("cannot perform conversion",
+            "character string is zero");
+        return std::string();
+    }
+    if (*s == 0) {
+        SC_REPORT_ERROR("cannot perform conversion",
+            "character string is empty");
+        return std::string();
+    }
+
+    int n = strlen(s);
+    int i = 0;
+    if (s[0] == '-' || s[0] == '+') {
+        ++i;
+    }
+    if (n > (i + 2) && s[i] == '0') {
+        if (s[i + 1] == 'b' || s[i + 1] == 'B') {
+            if (s[i + 2] == '0' || s[i + 2] == '1') {
+                std::string str(&s[2]);
+                str += "F";
+                return str;
+            }
+        }
+        if (s[i + 1] == 'b' || s[i + 1] == 'B' ||
+            s[i + 1] == 'c' || s[i + 1] == 'C' ||
+            s[i + 1] == 'd' || s[i + 1] == 'D' ||
+            s[i + 1] == 'o' || s[i + 1] == 'O' ||
+            s[i + 1] == 'x' || s[i + 1] == 'X') {
+            try {
+                // worst case length = n * 4
+                sc_fix a(s, n * 4, n * 4, SC_TRN, SC_WRAP, 0, SC_ON);
+                std::string str = a.to_bin();
+                str += "F"; // mark the string as formatted
+                // get rid of prefix (0b) and redundant leading bits
+                const char *p = str.c_str() + 2;
+                while (p[1] && p[0] == p[1]) {
+                    ++p;
+                }
+                return std::string(p);
+            } catch (const sc_core::sc_report &) {
+                std::stringstream msg;
+                msg << "character string '" << s << "' is not valid";
+                SC_REPORT_ERROR("cannot perform conversion",
+                        msg.str().c_str());
+                return std::string();
+            }
+        }
+    }
+
+    // bin by default
+    std::string str(s);
+    str += "U"; // mark the string as unformatted
+    return str;
+}
+
+// convert binary string to formatted string
+const std::string
+convert_to_fmt(const std::string &s, sc_numrep numrep, bool w_prefix)
+{
+    int n = s.length();
+    std::string str("0bus");
+    // str += "0bus";
+    str += s;
+    sc_ufix a(str.c_str(), n, n, SC_TRN, SC_WRAP, 0, SC_ON);
+    return a.to_string(numrep, w_prefix);
+}
+
+} // namespace sc_dt