dynarmic/src/backend_x64/emit_x64.h

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/* 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 <unordered_map>
#include <unordered_set>
#include <vector>
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#include <boost/optional.hpp>
#include <xbyak_util.h>
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#include "backend_x64/reg_alloc.h"
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#include "common/address_range.h"
#include "frontend/ir/location_descriptor.h"
#include "frontend/ir/terminal.h"
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namespace Dynarmic {
namespace IR {
class Block;
class Inst;
} // namespace IR
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namespace BackendX64 {
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class BlockOfCode;
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struct EmitContext {
EmitContext(RegAlloc& reg_alloc, IR::Block& block);
void EraseInstruction(IR::Inst* inst);
virtual bool FPSCR_RoundTowardsZero() const = 0;
virtual bool FPSCR_FTZ() const = 0;
virtual bool FPSCR_DN() const = 0;
RegAlloc& reg_alloc;
IR::Block& block;
};
class EmitX64 {
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public:
struct BlockDescriptor {
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CodePtr entrypoint; // Entrypoint of emitted code
size_t size; // Length in bytes of emitted code
};
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EmitX64(BlockOfCode* code);
virtual ~EmitX64();
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/// Looks up an emitted host block in the cache.
boost::optional<BlockDescriptor> GetBasicBlock(IR::LocationDescriptor descriptor) const;
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/// Empties the entire cache.
virtual void ClearCache();
/// Invalidates a selection of basic blocks.
void InvalidateBasicBlocks(const std::unordered_set<IR::LocationDescriptor>& locations);
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protected:
// Microinstruction emitters
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#define OPCODE(name, type, ...) void Emit##name(EmitContext& ctx, IR::Inst* inst);
#define A32OPC(...)
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#define A64OPC(...)
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#include "frontend/ir/opcodes.inc"
#undef OPCODE
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#undef A32OPC
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#undef A64OPC
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// Helpers
void EmitAddCycles(size_t cycles);
Xbyak::Label EmitCond(IR::Cond cond);
void EmitCondPrelude(const IR::Block& block);
void PushRSBHelper(Xbyak::Reg64 loc_desc_reg, Xbyak::Reg64 index_reg, IR::LocationDescriptor target);
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// Terminal instruction emitters
void EmitTerminal(IR::Terminal terminal, IR::LocationDescriptor initial_location);
virtual void EmitTerminalImpl(IR::Term::Interpret terminal, IR::LocationDescriptor initial_location) = 0;
virtual void EmitTerminalImpl(IR::Term::ReturnToDispatch terminal, IR::LocationDescriptor initial_location) = 0;
virtual void EmitTerminalImpl(IR::Term::LinkBlock terminal, IR::LocationDescriptor initial_location) = 0;
virtual void EmitTerminalImpl(IR::Term::LinkBlockFast terminal, IR::LocationDescriptor initial_location) = 0;
virtual void EmitTerminalImpl(IR::Term::PopRSBHint terminal, IR::LocationDescriptor initial_location) = 0;
virtual void EmitTerminalImpl(IR::Term::If terminal, IR::LocationDescriptor initial_location) = 0;
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virtual void EmitTerminalImpl(IR::Term::CheckBit terminal, IR::LocationDescriptor initial_location) = 0;
virtual void EmitTerminalImpl(IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location) = 0;
// Patching
struct PatchInformation {
std::vector<CodePtr> jg;
std::vector<CodePtr> jmp;
std::vector<CodePtr> mov_rcx;
};
void Patch(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr);
void Unpatch(const IR::LocationDescriptor& target_desc);
virtual void EmitPatchJg(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
virtual void EmitPatchJmp(const IR::LocationDescriptor& target_desc, CodePtr target_code_ptr = nullptr) = 0;
virtual void EmitPatchMovRcx(CodePtr target_code_ptr = nullptr) = 0;
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// State
BlockOfCode* code;
std::unordered_map<IR::LocationDescriptor, BlockDescriptor> block_descriptors;
std::unordered_map<IR::LocationDescriptor, PatchInformation> patch_information;
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};
} // namespace BackendX64
} // namespace Dynarmic