Initial Alloy implementation.

This is a regression in functionality and performance, but a much better
foundation for the future of the project (I think). It can run basic
apps under an SSA interpreter but doesn't support some of the features
required to do real 360 apps yet.

src/xenia/cpu/xenon_thread_state.h

@@ -0,0 +1,49 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_CPU_XENON_THREAD_STATE_H_
+#define XENIA_CPU_XENON_THREAD_STATE_H_
+
+#include <alloy/frontend/ppc/ppc_context.h>
+#include <alloy/runtime/thread_state.h>
+#include <xenia/core.h>
+
+
+namespace xe {
+namespace cpu {
+
+class XenonRuntime;
+
+
+class XenonThreadState : public alloy::runtime::ThreadState {
+public:
+  XenonThreadState(XenonRuntime* runtime, uint32_t thread_id,
+                   size_t stack_size, uint64_t thread_state_address);
+  virtual ~XenonThreadState();
+
+  alloy::frontend::ppc::PPCContext* context() const { return context_; }
+
+private:
+  size_t    stack_size_;
+  uint64_t  thread_state_address;
+
+  uint32_t  thread_id_;
+  uint64_t  stack_address_;
+  uint64_t  thread_state_address_;
+
+  // NOTE: must be 64b aligned for SSE ops.
+  alloy::frontend::ppc::PPCContext* context_;
+};
+
+
+}  // namespace cpu
+}  // namespace xe
+
+
+#endif  // XENIA_CPU_XENON_THREAD_STATE_H_