3c_disasm/instr/andx.cpp

   1 #include "../Iinstr.hpp"
   2
   3
   4 class Candx : public Iinstr {
   5         public:
   6                 Candx();
   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 Candx();
  22 }
  23
  24 Iinstr* Candx::getNew()
  25 {
  26     return new Candx();
  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 Candx::Candx()
  40 {
  41         opcode = B5(00101);
  42         name = "andx";
  43 }
  44
  45 void Candx::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 Candx::execInstr()
  61 {
  62         CDat val = this->m_cpu->getRegister(this->m_rd);
  63         CDat imm = generate16ImmFill(this->m_imm);
  64         if(this->m_hl) {
  65                 imm <<= 16;
  66         }
  67         val &= imm;
  68
  69         this->m_cpu->setRegister(this->m_rd, val);
  70         if(!this->m_d) {
  71                 this->m_cpu->updateFlags(val);
  72         }
  73 }
  74
  75 std::string Candx::toString()
  76 {
  77         stringstream op;
  78         op << this->getName();
  79
  80         if(m_hl) op << 'H';
  81         if(m_f) op << 'F';
  82         if(m_d) op << 'D';
  83
  84         op << this->getConditionFlag() << " r" << m_rd << ", " << m_imm;
  85
  86         return op.str();
  87 }