From: Martin Perner <martin@perner.cc>
Date: Wed, 3 Nov 2010 14:17:18 +0000 (+0100)
Subject: sim: stw added
X-Git-Tag: bootrom_v1~182
X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=calu.git;a=commitdiff_plain;h=7adbb05bcd21cb9fe830827693ae6c69a8b08d2a

sim: stw added
---

diff --git a/3c_disasm/instr/stw.cpp b/3c_disasm/instr/stw.cpp
new file mode 100644
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();
+}