New ppc opcode decoder.

Seems to work and match up with the old decoder (which may be bad).
Old decoder remains until all functionality is replaced.

src/xenia/cpu/ppc/ppc_opcode_info.h

@@ -0,0 +1,79 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2015 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_CPU_PPC_PPC_OPCODE_INFO_H_
+#define XENIA_CPU_PPC_PPC_OPCODE_INFO_H_
+
+#include <cstdint>
+
+#include "xenia/cpu/ppc/ppc_opcode.h"
+
+namespace xe {
+namespace cpu {
+namespace ppc {
+
+enum class PPCOpcodeFormat {
+  kSC,
+  kD,
+  kB,
+  kI,
+  kX,
+  kXL,
+  kXFX,
+  kXFL,
+  kVX,
+  kVX128,
+  kVX128_1,
+  kVX128_2,
+  kVX128_3,
+  kVX128_4,
+  kVX128_5,
+  kVX128_R,
+  kVX128_P,
+  kVC,
+  kVA,
+  kXO,
+  kXW,
+  kA,
+  kDS,
+  kM,
+  kMD,
+  kMDS,
+  kMDSH,
+  kXS,
+  kDCBZ,
+};
+
+enum class PPCOpcodeGroup {
+  kInt,
+  kFp,
+  kVmx,
+};
+
+struct PPCOpcodeInfo {
+  uint32_t opcode;
+  const char* name;
+  PPCOpcodeFormat format;
+  PPCOpcodeGroup group;
+  const char* description;
+};
+
+PPCOpcode LookupOpcode(uint32_t code);
+
+const PPCOpcodeInfo& GetOpcodeInfo(PPCOpcode opcode);
+
+inline const PPCOpcodeInfo& LookupOpcodeInfo(uint32_t code) {
+  return GetOpcodeInfo(LookupOpcode(code));
+}
+
+}  // namespace ppc
+}  // namespace cpu
+}  // namespace xe
+
+#endif  // XENIA_CPU_PPC_PPC_OPCODE_INFO_H_