Revert "Minor decoder optimizations, kernel fixes, cpu backend fixes"

src/xenia/cpu/backend/x64/x64_emitter.h

@@ -172,9 +172,7 @@ enum XmmConst {
   XMMLVLShuffle,
   XMMLVRCmp16,
   XMMSTVLShuffle,
-  XMMSTVRSwapMask,  // swapwordmask with bit 7 set
-  XMMVSRShlByteshuf,
-  XMMVSRMask
+  XMMSTVRSwapMask  // swapwordmask with bit 7 set
 
 };
 using amdfx::xopcompare_e;
@@ -192,6 +190,13 @@ class XbyakAllocator : public Xbyak::Allocator {
   virtual bool useProtect() const { return false; }
 };
 
+class ResolvableGuestCall {
+ public:
+  bool is_jump_;
+  uintptr_t destination_;
+  // rgcid
+  unsigned offset_;
+};
 class X64Emitter;
 using TailEmitCallback = std::function<void(X64Emitter& e, Xbyak::Label& lbl)>;
 struct TailEmitter {
@@ -215,6 +220,7 @@ class X64Emitter : public Xbyak::CodeGenerator {
             uint32_t debug_info_flags, FunctionDebugInfo* debug_info,
             void** out_code_address, size_t* out_code_size,
             std::vector<SourceMapEntry>* out_source_map);
+  void InjectCallAddresses(void* new_execute_addr);
 
  public:
   // Reserved:  rsp, rsi, rdi
@@ -224,7 +230,7 @@ class X64Emitter : public Xbyak::CodeGenerator {
   //            xmm4-xmm15 (save to get xmm3)
   static const int GPR_COUNT = 7;
   static const int XMM_COUNT = 12;
-  static constexpr size_t kStashOffset = 32;
+
   static void SetupReg(const hir::Value* v, Xbyak::Reg8& r) {
     auto idx = gpr_reg_map_[v->reg.index];
     r = Xbyak::Reg8(idx);
@@ -404,6 +410,8 @@ class X64Emitter : public Xbyak::CodeGenerator {
 
   static const uint32_t gpr_reg_map_[GPR_COUNT];
   static const uint32_t xmm_reg_map_[XMM_COUNT];
+  uint32_t current_rgc_id_ = 0xEEDDF00F;
+  std::vector<ResolvableGuestCall> call_sites_;
   /*
     set to true if the low 32 bits of membase == 0.
     only really advantageous if you are storing 32 bit 0 to a displaced address,