systemc: Add stubbed out versions of the sc_time functions.

Change-Id: Ie7e3eac0382dc2ed861eaa9ea53ab11069812db8
Reviewed-on: https://gem5-review.googlesource.com/10827
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Gabe Black <gabeblack@google.com>

3 files changed, 332 insertions, 0 deletions

diff --git a/src/systemc/SConscript b/src/systemc/SConscript
index 8be89bc46..976c34410 100644
--- a/src/systemc/SConscript
+++ b/src/systemc/SConscript
@@ -36,3 +36,4 @@ if env['USE_SYSTEMC']:
     Source('sc_main.cc')
     Source('sc_module_name.cc')
     Source('sc_object.cc')
+    Source('sc_time.cc')
diff --git a/src/systemc/sc_time.cc b/src/systemc/sc_time.cc
new file mode 100644
index 000000000..7c1b4eef7
--- /dev/null
+++ b/src/systemc/sc_time.cc
@@ -0,0 +1,233 @@
+/*
+ * Copyright 2018 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#include "systemc/sc_time.hh"
+
+#include "base/logging.hh"
+
+namespace sc_core
+{
+
+sc_time::sc_time()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+sc_time::sc_time(double, sc_time_unit)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+sc_time::sc_time(const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+sc_time &
+sc_time::operator = (const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *this;
+}
+
+sc_dt::uint64
+sc_time::value() const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return 0;
+}
+
+double
+sc_time::to_double() const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return 0.0;
+}
+double
+sc_time::to_seconds() const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return 0.0;
+}
+
+const std::string
+sc_time::to_string() const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return "";
+}
+
+bool
+sc_time::operator == (const sc_time &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return true;
+}
+
+bool
+sc_time::operator != (const sc_time &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return false;
+}
+
+bool
+sc_time::operator < (const sc_time &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return false;
+}
+
+bool
+sc_time::operator <= (const sc_time &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return true;
+}
+
+bool
+sc_time::operator > (const sc_time &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return false;
+}
+
+bool
+sc_time::operator >= (const sc_time &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return true;
+}
+
+sc_time &
+sc_time::operator += (const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *this;
+}
+
+sc_time &
+sc_time::operator -= (const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *this;
+}
+
+sc_time &
+sc_time::operator *= (double)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *this;
+}
+
+sc_time &
+sc_time::operator /= (double)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *this;
+}
+
+void
+sc_time::print(std::ostream &) const
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+const sc_time
+operator + (const sc_time &, const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return sc_time();
+}
+
+const sc_time
+operator - (const sc_time &, const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return sc_time();
+}
+
+const sc_time
+operator * (const sc_time &, double)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return sc_time();
+}
+
+const sc_time
+operator * (double, const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return sc_time();
+}
+
+const sc_time
+operator / (const sc_time &, double)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return sc_time();
+}
+
+double
+operator / (const sc_time &, const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return 0.0;
+}
+
+std::ostream &
+operator << (std::ostream &os, const sc_time &)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return os;
+}
+
+const sc_time SC_ZERO_TIME;
+
+void
+sc_set_time_resolution(double, sc_time_unit)
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+}
+
+sc_time
+sc_get_time_resolution()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return sc_time();
+}
+
+const sc_time &
+sc_max_time()
+{
+    warn("%s not implemented.\n", __PRETTY_FUNCTION__);
+    return *(const sc_time *)nullptr;
+}
+
+} // namespace sc_core
diff --git a/src/systemc/sc_time.hh b/src/systemc/sc_time.hh
new file mode 100644
index 000000000..3c70ba9b9
--- /dev/null
+++ b/src/systemc/sc_time.hh
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2018 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __SYSTEMC_SC_TIME_HH__
+#define __SYSTEMC_SC_TIME_HH__
+
+#include <stdint.h>
+
+#include <iostream>
+
+#include "dt/int/sc_nbdefs.hh"
+
+namespace sc_core
+{
+
+enum sc_time_unit {
+    SC_FS = 0,
+    SC_PS,
+    SC_NS,
+    SC_US,
+    SC_MS,
+    SC_SEC
+};
+
+class sc_time
+{
+  public:
+    sc_time();
+    sc_time(double, sc_time_unit);
+    sc_time(const sc_time &);
+
+    sc_time &operator = (const sc_time &);
+
+    sc_dt::uint64 value() const;
+    double to_double() const;
+    double to_seconds() const;
+    const std::string to_string() const;
+
+    bool operator == (const sc_time &) const;
+    bool operator != (const sc_time &) const;
+    bool operator < (const sc_time &) const;
+    bool operator <= (const sc_time &) const;
+    bool operator > (const sc_time &) const;
+    bool operator >= (const sc_time &) const;
+
+    sc_time &operator += (const sc_time &);
+    sc_time &operator -= (const sc_time &);
+    sc_time &operator *= (double);
+    sc_time &operator /= (double);
+
+    void print(std::ostream & =std::cout) const;
+};
+
+const sc_time operator + (const sc_time &, const sc_time &);
+const sc_time operator - (const sc_time &, const sc_time &);
+
+const sc_time operator * (const sc_time &, double);
+const sc_time operator * (double, const sc_time &);
+const sc_time operator / (const sc_time &, double);
+double operator / (const sc_time &, const sc_time &);
+
+std::ostream &operator << (std::ostream &, const sc_time &);
+
+extern const sc_time SC_ZERO_TIME;
+
+void sc_set_time_resolution(double, sc_time_unit);
+sc_time sc_get_time_resolution();
+const sc_time &sc_max_time();
+
+} // namespace sc_core
+
+#endif  //__SYSTEMC_SC_TIME_HH__