3c_disasm/instr/movf.cpp

   1 #include "../Iinstr.hpp"
   2
   3 class Cmovf : public Iinstr {
   4         private:
   5                 bool m_type;
   6         public:
   7                 Cmovf();
   8                 void evalInstr();
   9                 void execInstr();
  10                 std::string toString();
  11                 Iinstr* getNew();
  12 };
  13
  14 /**
  15  * Name:      create_instruction
  16  * Purpose:   if compiled as shared library, this functions creates the
  17               instruction object
  18
  19  * Returns:   pointer to instruction object
  20  */
  21 extern "C" Iinstr* create_instruction() {
  22     return new Cmovf();
  23 }
  24
  25 Iinstr* Cmovf::getNew() {
  26         return new Cmovf();
  27 }
  28
  29 /**
  30  * Name:      destroy_instruction
  31  * Purpose:   if compiled as shared library, this functions destoys the
  32               instruction object
  33
  34  * Parameter: IInstruction - the instruction object to delete
  35  */
  36 extern "C" void destroy_instruction(Iinstr* p) {
  37     delete p;
  38 }
  39
  40 Cmovf::Cmovf() : m_type(0)
  41 {
  42         opcode = B5(01100);
  43         name = "movf";
  44 }
  45
  46 void Cmovf::evalInstr()
  47 {
  48         this->m_type = argbits[18];
  49         if(this->m_type) {
  50                 name = "movpf";
  51         }
  52         else {
  53                 name = "movsf";
  54         }
  55
  56         argbits >>= 19;
  57         m_rd = this->getRegister(argbits);
  58 }
  59
  60 void Cmovf::execInstr()
  61 {
  62         //cout << "should exec " << this->toString() << endl;
  63         CDat val;
  64         if(this->m_type) {
  65                 val = this->m_cpu->getFlags();
  66         }
  67         else {
  68                 val = this->m_cpu->getStack();
  69         }
  70         this->m_cpu->setRegister(this->m_rd, val);
  71 }
  72
  73 std::string Cmovf::toString()
  74 {
  75         stringstream op;
  76         op << this->getName();
  77         op << " r" << m_rd;
  78         return op.str();
  79 }