sim: added special moves

[calu.git] / 3c_disasm / instr / movf.cpp

diff --git a/3c_disasm/instr/movf.cpp b/3c_disasm/instr/movf.cpp
new file mode 100644 (file)
index 0000000..d2c0a35
--- /dev/null
+++ b/3c_disasm/instr/movf.cpp
@@ -0,0 +1,79 @@
+#include "../Iinstr.hpp"
+
+class Cmovf : public Iinstr {
+       private:
+               bool m_type;
+       public:
+               Cmovf();
+               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 Cmovf();
+}
+
+Iinstr* Cmovf::getNew() {
+       return new Cmovf();
+}
+
+/**
+ * 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;
+}
+
+Cmovf::Cmovf() : m_type(0)
+{
+       opcode = B5(01100);
+       name = "movf";
+}
+
+void Cmovf::evalInstr()
+{
+       this->m_type = argbits[18];
+       if(this->m_type) {
+               name = "movpf";
+       }
+       else {
+               name = "movsf";
+       }
+       
+       argbits >>= 19;
+       m_rd = this->getRegister(argbits);
+}
+
+void Cmovf::execInstr()
+{
+       //cout << "should exec " << this->toString() << endl;
+       CDat val;
+       if(this->m_type) {
+               val = this->m_cpu->getFlags();
+       }
+       else {
+               val = this->m_cpu->getStack();
+       }
+       this->m_cpu->setRegister(this->m_rd, val);
+}
+
+std::string Cmovf::toString()
+{
+       stringstream op;
+       op << this->getName();
+       op << " r" << m_rd;
+       return op.str();
+}