Lay down initial JIT structure

src/backend/core/JIT.cpp

@@ -0,0 +1,47 @@
+#include <JIT.hpp>
+
+namespace n64 {
+using namespace Xbyak;
+JIT::JIT() : CodeGenerator(0x80000) { }
+
+void JIT::Reset() {
+  reset();
+  regs.Reset();
+  mem.Reset();
+}
+
+bool JIT::ShouldServiceInterrupt() {
+
+}
+
+void JIT::CheckCompareInterrupt() {
+
+}
+
+int JIT::Step() {
+  CheckCompareInterrupt();
+
+  regs.prevDelaySlot = regs.delaySlot;
+  regs.delaySlot = false;
+
+  u32 paddr = 0;
+  if(!MapVAddr(regs, LOAD, regs.pc, paddr)) {
+    HandleTLBException(regs, regs.pc);
+    FireException(regs, GetTLBExceptionCode(regs.cop0.tlbError, LOAD), 0, false);
+    return 0;
+  }
+
+  u32 instruction = mem.Read32(regs, paddr);
+
+  if(ShouldServiceInterrupt()) {
+    FireException(regs, ExceptionCode::Interrupt, 0, false);
+    return 0;
+  }
+
+  regs.oldPC = regs.pc;
+  regs.pc = regs.nextPC;
+  regs.nextPC += 4;
+
+  return 1;
+}
+}