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https://github.com/RetroDECK/Duckstation.git
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19d6037b99
Implemented for all execution modes. Disabled by default in the cached interpreter and recompiler, always enabled in the pure interpreter.
108 lines
2.7 KiB
C++
108 lines
2.7 KiB
C++
#pragma once
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#include "common/bitfield.h"
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#include "common/jit_code_buffer.h"
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#include "cpu_types.h"
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#include <array>
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#include <memory>
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#include <unordered_map>
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#include <vector>
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namespace CPU {
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union CodeBlockKey
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{
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u32 bits;
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BitField<u32, bool, 0, 1> user_mode;
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BitField<u32, u32, 2, 30> aligned_pc;
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ALWAYS_INLINE u32 GetPC() const { return aligned_pc << 2; }
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ALWAYS_INLINE void SetPC(u32 pc) { aligned_pc = pc >> 2; }
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ALWAYS_INLINE u32 GetPCPhysicalAddress() const { return (aligned_pc << 2) & PHYSICAL_MEMORY_ADDRESS_MASK; }
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ALWAYS_INLINE CodeBlockKey& operator=(const CodeBlockKey& rhs)
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{
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bits = rhs.bits;
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return *this;
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}
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ALWAYS_INLINE bool operator==(const CodeBlockKey& rhs) const { return bits == rhs.bits; }
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ALWAYS_INLINE bool operator!=(const CodeBlockKey& rhs) const { return bits != rhs.bits; }
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ALWAYS_INLINE bool operator<(const CodeBlockKey& rhs) const { return bits < rhs.bits; }
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};
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struct CodeBlockInstruction
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{
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Instruction instruction;
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u32 pc;
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bool is_branch_instruction : 1;
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bool is_branch_delay_slot : 1;
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bool is_load_instruction : 1;
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bool is_store_instruction : 1;
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bool is_load_delay_slot : 1;
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bool is_last_instruction : 1;
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bool has_load_delay : 1;
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bool can_trap : 1;
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};
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struct CodeBlock
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{
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using HostCodePointer = void (*)();
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CodeBlock(const CodeBlockKey key_) : key(key_) {}
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CodeBlockKey key;
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u32 host_code_size = 0;
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HostCodePointer host_code = nullptr;
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std::vector<CodeBlockInstruction> instructions;
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std::vector<CodeBlock*> link_predecessors;
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std::vector<CodeBlock*> link_successors;
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TickCount uncached_fetch_ticks = 0;
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u32 icache_line_count = 0;
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bool invalidated = false;
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const u32 GetPC() const { return key.GetPC(); }
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const u32 GetSizeInBytes() const { return static_cast<u32>(instructions.size()) * sizeof(Instruction); }
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const u32 GetStartPageIndex() const { return (key.GetPCPhysicalAddress() / CPU_CODE_CACHE_PAGE_SIZE); }
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const u32 GetEndPageIndex() const
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{
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return ((key.GetPCPhysicalAddress() + GetSizeInBytes()) / CPU_CODE_CACHE_PAGE_SIZE);
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}
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bool IsInRAM() const
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{
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// TODO: Constant
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return key.GetPCPhysicalAddress() < 0x200000;
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}
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};
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namespace CodeCache {
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void Initialize(bool use_recompiler);
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void Shutdown();
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void Execute();
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#ifdef WITH_RECOMPILER
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void ExecuteRecompiler();
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#endif
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/// Flushes the code cache, forcing all blocks to be recompiled.
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void Flush();
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/// Changes whether the recompiler is enabled.
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void SetUseRecompiler(bool enable);
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/// Invalidates all blocks which are in the range of the specified code page.
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void InvalidateBlocksWithPageIndex(u32 page_index);
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template<PGXPMode pgxp_mode>
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void InterpretCachedBlock(const CodeBlock& block);
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void InterpretUncachedBlock();
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}; // namespace CodeCache
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} // namespace CPU
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