Label A32 specific code appropriately

src/frontend/A32/decoder/thumb32.h

@@ -0,0 +1,47 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2016 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#pragma once
+
+#include <vector>
+
+#include <boost/optional.hpp>
+
+#include "common/common_types.h"
+#include "frontend/decoder/decoder_detail.h"
+#include "frontend/decoder/matcher.h"
+
+namespace Dynarmic {
+namespace A32 {
+
+template <typename Visitor>
+using Thumb32Matcher = Decoder::Matcher<Visitor, u32>;
+
+template<typename V>
+boost::optional<const Thumb32Matcher<V>&> DecodeThumb32(u32 instruction) {
+    static const std::vector<Thumb32Matcher<V>> table = {
+
+#define INST(fn, name, bitstring) Decoder::detail::detail<Thumb32Matcher<V>>::GetMatcher(fn, name, bitstring)
+
+        // Branch instructions
+        INST(&V::thumb32_BL_imm,         "BL (imm)",                 "11110vvvvvvvvvvv11111vvvvvvvvvvv"), // v4T
+        INST(&V::thumb32_BLX_imm,        "BLX (imm)",                "11110vvvvvvvvvvv11101vvvvvvvvvvv"), // v5T
+
+        // Misc instructions
+        INST(&V::thumb32_UDF,            "UDF",                      "111101111111----1010------------"), // v6T2
+
+#undef INST
+
+    };
+
+    const auto matches_instruction = [instruction](const auto& matcher){ return matcher.Matches(instruction); };
+
+    auto iter = std::find_if(table.begin(), table.end(), matches_instruction);
+    return iter != table.end() ? boost::optional<const Thumb32Matcher<V>&>(*iter) : boost::none;
+}
+
+} // namespace A32
+} // namespace Dynarmic