1 files changed, 89 insertions, 0 deletions

diff --git a/ue4/mycpu/ccpu.cpp b/ue4/mycpu/ccpu.cpp
new file mode 100644
index 0000000..af86200
--- /dev/null
+++ b/ue4/mycpu/ccpu.cpp
@@ -0,0 +1,89 @@
+/**
+ * @module ccpu
+ * @author Guenther Neuwirth (0626638), Manuel Mausz (0728348)
+ * @brief  CPU implementation. Used as a container for memory and instructions.
+ *         Implements an run method to execute the program (= the instructions).
+ * @date   10.05.2009
+ */
+
+#ifdef DEBUG
+# include <iostream>
+# include <iomanip>
+#endif
+#include "ccpu.h"
+#include "displays.h"
+
+using namespace std;
+
+CCPU::CCPU(const unsigned cnt)
+  : m_regcnt(cnt), m_memory(NULL), m_program(NULL), m_flagzero(false), m_flagsign(false)
+{
+  /* create registers */
+  m_registers = new CDat[cnt];
+  for(unsigned i = 0; i < cnt; ++i)
+    m_registers[i] = 0;
+
+  /* create displays */
+  m_displays.insert(new CDisplayWDEZ);
+  m_displays.insert(new CDisplayWHEX);
+}
+
+/*----------------------------------------------------------------------------*/
+
+CCPU::~CCPU()
+{
+  /* delete registers */
+  delete[] m_registers;
+  m_registers = NULL;
+
+  /* delete displays */
+  std::set<CDisplay *>::iterator it;
+  for (it = m_displays.begin() ; it != m_displays.end(); ++it)
+    delete *it;
+}
+
+/*----------------------------------------------------------------------------*/
+
+void CCPU::run()
+{
+  if (m_memory == NULL)
+    throw runtime_error("CPU has no memory");
+  if (m_program == NULL)
+    throw runtime_error("CPU has no program to execute");
+  if (m_regcnt == 0)
+    throw runtime_error("CPU has no registers");
+
+  bool run = true;
+  while(run)
+  {
+    unsigned pc = static_cast<unsigned>(m_registers[0]);
+
+    /* end of the program reached */
+    if (pc == m_program->size())
+      break;
+
+    /* pc is out of bound */
+    if (pc > m_program->size())
+      throw runtime_error("Programcounter is out of bound");
+
+    /* execute instruction */
+    (*m_program->at(pc))(this);
+    ++m_registers[0];
+  }
+}
+
+/*----------------------------------------------------------------------------*/
+
+#if DEBUG
+void CCPU::dumpRegisters(std::ostream& out)
+{
+  out << "[REGISTER DUMP]" << endl;
+  for(unsigned i = 0; i < getRegisterCount(); ++i)
+  {
+    out << "[" << std::setw(4) << std::setfill('0') << i << "]  "
+        << m_registers[i] << endl;
+  }
+}
+#endif
+
+/* vim: set et sw=2 ts=2: */