Place all XMM constants in memory so we can avoid clobbering rax.

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

@@ -16,6 +16,7 @@
 #include "xenia/base/arena.h"
 #include "xenia/cpu/hir/value.h"
 #include "xenia/debug/function_trace_data.h"
+#include "xenia/memory.h"
 
 namespace xe {
 namespace cpu {
@@ -117,6 +118,8 @@ class X64Emitter : public Xbyak::CodeGenerator {
             uint32_t debug_info_flags, DebugInfo* debug_info,
             void*& out_code_address, size_t& out_code_size);
 
+  static uint32_t PlaceData(Memory* memory);
+
  public:
   // Reserved:  rsp
   // Scratch:   rax/rcx/rdx