mirror of
https://github.com/libretro/ppsspp.git
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126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include <vector>
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#include "Core/MIPS/x86/Jit.h"
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class ThunkManager;
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namespace MIPSComp {
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class JitSafeMem {
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public:
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JitSafeMem(Jit *jit, MIPSGPReg raddr, s32 offset, u32 alignMask = 0xFFFFFFFF);
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static void Init(Jit *jit);
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// Emit code necessary for a memory write, returns true if MOV to dest is needed.
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bool PrepareWrite(Gen::OpArg &dest, int size);
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// Emit code proceeding a slow write call, returns true if slow write is needed.
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bool PrepareSlowWrite();
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// Emit a slow write from src.
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void DoSlowWrite(const void *safeFunc, const Gen::OpArg src, int suboffset = 0);
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template <typename T>
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void DoSlowWrite(void (*safeFunc)(T val, u32 addr), const Gen::OpArg src, int suboffset = 0) {
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DoSlowWrite((const void *)safeFunc, src, suboffset);
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}
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// Emit code necessary for a memory read, returns true if MOV from src is needed.
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bool PrepareRead(Gen::OpArg &src, int size);
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// Emit code for a slow read call, and returns true if result is in EAX.
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bool PrepareSlowRead(const void *safeFunc);
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template <typename T>
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bool PrepareSlowRead(T (*safeFunc)(u32 addr)) {
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return PrepareSlowRead((const void *)safeFunc);
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}
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// Cleans up final code for the memory access.
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void Finish();
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// Use this before anything else if you're gonna use the below.
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void SetFar();
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// WARNING: Only works for non-GPR. Do not use for reads into GPR.
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Gen::OpArg NextFastAddress(int suboffset);
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// WARNING: Only works for non-GPR. Do not use for reads into GPR.
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void NextSlowRead(const void *safeFunc, int suboffset);
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template <typename T>
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void NextSlowRead(T (*safeFunc)(u32 addr), int suboffset) {
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NextSlowRead((const void *)safeFunc, suboffset);
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}
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private:
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enum MemoryOpType {
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MEM_READ,
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MEM_WRITE,
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};
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Gen::OpArg PrepareMemoryOpArg(MemoryOpType type);
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void PrepareSlowAccess();
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void MemCheckImm(MemoryOpType type);
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void MemCheckAsm(MemoryOpType type);
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bool ImmValid();
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Jit *jit_;
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MIPSGPReg raddr_;
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s32 offset_;
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int size_;
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bool needsCheck_;
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bool needsSkip_;
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bool far_;
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bool fast_;
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u32 alignMask_;
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u32 iaddr_;
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Gen::X64Reg xaddr_;
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Gen::FixupBranch tooLow_, tooHigh_, skip_;
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std::vector<Gen::FixupBranch> skipChecks_;
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const u8 *safe_;
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};
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// Kept separate to avoid mistakes in the above class not using jit_.
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class JitSafeMemFuncs : public Gen::XCodeBlock
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{
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public:
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JitSafeMemFuncs() {
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}
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~JitSafeMemFuncs() {
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Shutdown();
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}
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void Init(ThunkManager *thunks);
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void Shutdown();
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const u8 *readU32;
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const u8 *readU16;
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const u8 *readU8;
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const u8 *writeU32;
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const u8 *writeU16;
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const u8 *writeU8;
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private:
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void CreateReadFunc(int bits, const void *fallbackFunc);
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void CreateWriteFunc(int bits, const void *fallbackFunc);
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void CheckDirectEAX();
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void StartDirectAccess();
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std::vector<Gen::FixupBranch> skips_;
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ThunkManager *thunks_;
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};
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}; |