b1d3e7aae9
* Only have a single std::unordered_map for patching information * Factor patch emitters into own functions * Implement EmitX64::Unpatch
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2016 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#pragma once
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#include <unordered_map>
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#include <vector>
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#include <boost/optional.hpp>
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#include <xbyak_util.h>
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#include "backend_x64/reg_alloc.h"
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#include "dynarmic/callbacks.h"
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#include "frontend/ir/location_descriptor.h"
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#include "frontend/ir/terminal.h"
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namespace Dynarmic {
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class Jit;
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namespace IR {
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class Block;
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class Inst;
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} // namespace IR
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namespace BackendX64 {
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class BlockOfCode;
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class EmitX64 final {
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public:
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struct BlockDescriptor {
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CodePtr code_ptr; ///< Entrypoint of emitted code
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size_t size; ///< Length in bytes of emitted code
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};
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EmitX64(BlockOfCode* code, UserCallbacks cb, Jit* jit_interface);
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/**
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* Emit host machine code for a basic block with intermediate representation `ir`.
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* @note ir is modified.
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*/
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BlockDescriptor Emit(IR::Block& ir);
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/// Looks up an emitted host block in the cache.
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boost::optional<BlockDescriptor> GetBasicBlock(IR::LocationDescriptor descriptor) const;
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/// Empties the cache.
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void ClearCache();
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private:
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// Microinstruction emitters
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#define OPCODE(name, type, ...) void Emit##name(IR::Block& block, IR::Inst* inst);
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#include "frontend/ir/opcodes.inc"
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#undef OPCODE
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// Helpers
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void EmitAddCycles(size_t cycles);
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void EmitCondPrelude(const IR::Block& block);
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// Terminal instruction emitters
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void EmitTerminal(IR::Terminal terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalInterpret(IR::Term::Interpret terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalReturnToDispatch(IR::Term::ReturnToDispatch terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalLinkBlock(IR::Term::LinkBlock terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalLinkBlockFast(IR::Term::LinkBlockFast terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalPopRSBHint(IR::Term::PopRSBHint terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalIf(IR::Term::If terminal, IR::LocationDescriptor initial_location);
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void EmitTerminalCheckHalt(IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location);
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// Patching
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struct PatchInformation {
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std::vector<CodePtr> jg;
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std::vector<CodePtr> jmp;
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std::vector<CodePtr> mov_rcx;
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};
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void Patch(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr);
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void Unpatch(const IR::LocationDescriptor& target_desc);
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void EmitPatchJg(CodePtr target_code_ptr = nullptr);
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void EmitPatchJmp(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr);
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void EmitPatchMovRcx(CodePtr target_code_ptr = nullptr);
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// Global CPU information
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Xbyak::util::Cpu cpu_info;
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// Per-block state
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RegAlloc reg_alloc;
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// State
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BlockOfCode* code;
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UserCallbacks cb;
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Jit* jit_interface;
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std::unordered_map<u64, BlockDescriptor> block_descriptors;
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std::unordered_map<u64, PatchInformation> patch_information;
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};
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} // namespace BackendX64
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} // namespace Dynarmic
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