3c_disasm/instr/orx.cpp

   1 #include "../Iinstr.hpp"
   2
   3
   4 class Corx : public Iinstr {
   5         public:
   6                 Corx();
   7                 void evalInstr();
   8                 void execInstr();
   9                 std::string toString();
  10                 Iinstr* getNew();
  11 };
  12
  13 /**
  14  * Name:      create_instruction
  15  * Purpose:   if compiled as shared library, this functions creates the
  16               instruction object
  17
  18  * Returns:   pointer to instruction object
  19  */
  20 extern "C" Iinstr* create_instruction() {
  21     return new Corx();
  22 }
  23
  24 Iinstr* Corx::getNew()
  25 {
  26     return new Corx();
  27 }
  28 /**
  29  * Name:      destroy_instruction
  30  * Purpose:   if compiled as shared library, this functions destoys the
  31               instruction object
  32
  33  * Parameter: IInstruction - the instruction object to delete
  34  */
  35 extern "C" void destroy_instruction(Iinstr* p) {
  36     delete p;
  37 }
  38
  39 Corx::Corx()
  40 {
  41         opcode = B5(00111);
  42         name = "orx";
  43 }
  44
  45 void Corx::evalInstr()
  46 {
  47         this->m_d = argbits[0];
  48         this->m_f = argbits[1];
  49         this->m_hl = argbits[2];
  50
  51         argbits >>= 3;
  52         dynamic_bitset<> immb = argbits;
  53         immb.resize(16);
  54         this->m_imm = this->generate16ImmSign(immb.to_ulong());
  55
  56         argbits >>= 16;
  57         m_rd = this->getRegister(argbits);
  58 }
  59
  60 void Corx::execInstr()
  61 {
  62         CDat val = this->m_cpu->getRegister(this->m_rd);
  63         CDat imm = generate16ImmFill(this->m_imm);
  64         val |= imm;
  65
  66         this->m_cpu->setRegister(this->m_rd, val);
  67         if(!this->m_d) {
  68                 this->m_cpu->updateFlags(val);
  69         }
  70 }
  71
  72 std::string Corx::toString()
  73 {
  74         stringstream op;
  75         op << this->getName();
  76
  77         if(m_hl) op << 'H';
  78         if(m_f) op << 'F';
  79         if(m_d) op << 'D';
  80
  81         op << this->getConditionFlag() << " r" << m_rd << ", " << m_imm;
  82
  83         return op.str();
  84 }