shader: Initial recompiler work

src/shader_recompiler/frontend/ir/opcode.h

@@ -0,0 +1,44 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string_view>
+
+#include <fmt/format.h>
+
+#include "shader_recompiler/frontend/ir/type.h"
+
+namespace Shader::IR {
+
+enum class Opcode {
+#define OPCODE(name, ...) name,
+#include "opcode.inc"
+#undef OPCODE
+};
+
+/// Get return type of an opcode
+[[nodiscard]] Type TypeOf(Opcode op);
+
+/// Get the number of arguments an opcode accepts
+[[nodiscard]] size_t NumArgsOf(Opcode op);
+
+/// Get the required type of an argument of an opcode
+[[nodiscard]] Type ArgTypeOf(Opcode op, size_t arg_index);
+
+/// Get the name of an opcode
+[[nodiscard]] std::string_view NameOf(Opcode op);
+
+} // namespace Shader::IR
+
+template <>
+struct fmt::formatter<Shader::IR::Opcode> {
+    constexpr auto parse(format_parse_context& ctx) {
+        return ctx.begin();
+    }
+    template <typename FormatContext>
+    auto format(const Shader::IR::Opcode& op, FormatContext& ctx) {
+        return format_to(ctx.out(), "{}", Shader::IR::NameOf(op));
+    }
+};