+#include "../Iinstr.hpp"
+
+class Csub : public Iinstr {
+ public:
+ Csub();
+ 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 Csub();
+}
+
+Iinstr* Csub::getNew() {
+ return new Csub();
+}
+
+/**
+ * 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;
+}
+
+Csub::Csub()
+{
+ opcode = B5(00001);
+ name = "sub";
+}
+
+void Csub::evalInstr()
+{
+ this->m_d = argbits[0];
+ this->m_c = argbits[1];
+
+ argbits >>= 11;
+ m_rb = this->getRegister(argbits);
+
+ argbits >>= 4;
+ m_ra = this->getRegister(argbits);
+
+ argbits >>= 4;
+ m_rd = this->getRegister(argbits);
+}
+
+void Csub::execInstr()
+{
+ //cout << "should exec " << this->toString() << endl;
+ CDat ra = this->m_cpu->getRegister(m_ra);
+ CDat rb = this->m_cpu->getRegister(m_rb);
+ CDatd val = ra - rb;
+ this->m_cpu->setRegister(m_rd, val);
+ if(!this->m_d) {
+ this->m_cpu->updateFlags(val, ra, rb);
+ }
+}
+
+std::string Csub::toString()
+{
+ stringstream op;
+ op << this->getName();
+
+ if(m_d) op << 'D';
+ if(m_c) op << 'C';
+
+ op << " r" << m_rd << ", r" << m_ra << ", r" << m_rb;
+ return op.str();
+}