sim: stw added

diff --git a/3c_disasm/instr/stw.cpp b/3c_disasm/instr/stw.cpp
new file mode 100644 (file)
index 0000000..aec062b
--- /dev/null
+++ b/3c_disasm/instr/stw.cpp
@@ -0,0 +1,77 @@
+#include "../Iinstr.hpp"
+
+
+class Cstw : public Iinstr {
+       public:
+               Cstw();
+               void evalInstr();
+               void execInstr();
+               std::string toString();
+               Iinstr* getNew();
+};
+
+/**
+ * Name:      create_instruction
+ * Purpose:   if compiled as shared library, this functions creates the 
+              instruction object
+
+ * Returns:   pointer to instruction object
+ */
+extern "C" Iinstr* create_instruction() {
+    return new Cstw();
+}
+
+Iinstr* Cstw::getNew()
+{
+    return new Cstw();
+}
+
+/**
+ * Name:      destroy_instruction
+ * Purpose:   if compiled as shared library, this functions destoys the 
+              instruction object
+
+ * Parameter: IInstruction - the instruction object to delete
+ */
+extern "C" void destroy_instruction(Iinstr* p) {
+    delete p;
+}
+
+Cstw::Cstw()
+{
+       opcode = B5(01111);
+       name = "stw";
+}
+
+void Cstw::evalInstr()
+{
+       this->m_s = true;
+
+       dynamic_bitset<> immb = argbits;
+       immb.resize(15);
+       this->m_imm = this->generate15ImmSign(immb.to_ulong());
+
+       argbits >>= 15;
+       m_ra = this->getRegister(argbits);
+       argbits >>= 4;
+       m_rd = this->getRegister(argbits);
+
+}
+
+void Cstw::execInstr()
+{
+       //cout << "should exec " << this->toString() << endl;
+       CDat val = this->m_cpu->getRegister(this->m_ra);
+       val += m_imm;
+       this->m_cpu->setRAM(val, this->m_cpu->getRegister(this->m_rd));
+}
+
+std::string Cstw::toString()
+{
+       stringstream op;
+       op << this->getName();
+
+       op << this->getConditionFlag() << " r" << m_rd << ", " << m_imm << "(r" <<  m_ra << ")";
+
+       return op.str();
+}