shader: Implement BRX

src/shader_recompiler/frontend/maxwell/indirect_branch_table_track.h

@@ -0,0 +1,28 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <optional>
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/environment.h"
+#include "shader_recompiler/frontend/ir/reg.h"
+#include "shader_recompiler/frontend/maxwell/location.h"
+
+namespace Shader::Maxwell {
+
+struct IndirectBranchTableInfo {
+    u32 cbuf_index{};
+    u32 cbuf_offset{};
+    u32 num_entries{};
+    s32 branch_offset{};
+    IR::Reg branch_reg{};
+};
+
+std::optional<IndirectBranchTableInfo> TrackIndirectBranchTable(Environment& env, Location brx_pos,
+                                                                Location block_begin);
+
+} // namespace Shader::Maxwell