mirror of
https://github.com/hrydgard/ppsspp.git
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148 lines
4.4 KiB
C++
148 lines
4.4 KiB
C++
// Copyright (C) 2003 Dolphin 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 SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "math/math_util.h"
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#include "ABI.h"
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#include "x64Emitter.h"
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#include "Core/Core.h"
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#include "Core/MemMap.h"
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#include "Core/System.h"
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#include "Core/MIPS/MIPS.h"
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#include "Core/CoreTiming.h"
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#include "Common/MemoryUtil.h"
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#include "Core/MIPS/JitCommon/JitCommon.h"
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#include "Core/MIPS/x86/Asm.h"
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#include "Core/MIPS/x86/Jit.h"
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using namespace Gen;
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//TODO - make an option
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//#if _DEBUG
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static bool enableDebug = false;
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//#else
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// bool enableDebug = false;
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//#endif
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//static bool enableStatistics = false; //unused?
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//GLOBAL STATIC ALLOCATIONS x86
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//EAX - ubiquitous scratch register - EVERYBODY scratches this
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//GLOBAL STATIC ALLOCATIONS x64
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//EAX - ubiquitous scratch register - EVERYBODY scratches this
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//RBX - Base pointer of memory
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//R15 - Pointer to array of block pointers
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extern volatile CoreState coreState;
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void Jit()
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{
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MIPSComp::jit->Compile(currentMIPS->pc);
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}
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// IDEA, NOT IMPLEMENTED: no more block numbers - hack opcodes just contain offset within
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// dynarec buffer, gets rid of lookup into block buffer
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// At this offset - 4, there is an int specifying the block number if needed.
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void ImHere()
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{
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DEBUG_LOG(CPU, "JIT Here: %08x", currentMIPS->pc);
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}
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void AsmRoutineManager::Generate(MIPSState *mips, MIPSComp::Jit *jit)
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{
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enterCode = AlignCode16();
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ABI_PushAllCalleeSavedRegsAndAdjustStack();
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#ifdef _M_X64
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// Two statically allocated registers.
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MOV(64, R(RBX), Imm64((u64)Memory::base));
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MOV(64, R(R15), Imm64((u64)jit->GetBasePtr())); //It's below 2GB so 32 bits are good enough
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#endif
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outerLoop = GetCodePtr();
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ABI_CallFunction(reinterpret_cast<void *>(&CoreTiming::Advance));
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FixupBranch skipToRealDispatch = J(); //skip the sync and compare first time
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dispatcherCheckCoreState = GetCodePtr();
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// The result of slice decrementation should be in flags if somebody jumped here
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// IMPORTANT - We jump on negative, not carry!!!
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FixupBranch bailCoreState = J_CC(CC_S, true);
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CMP(32, M((void*)&coreState), Imm32(0));
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FixupBranch badCoreState = J_CC(CC_NZ, true);
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FixupBranch skipToRealDispatch2 = J(); //skip the sync and compare first time
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dispatcher = GetCodePtr();
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// The result of slice decrementation should be in flags if somebody jumped here
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// IMPORTANT - We jump on negative, not carry!!!
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FixupBranch bail = J_CC(CC_S, true);
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SetJumpTarget(skipToRealDispatch);
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SetJumpTarget(skipToRealDispatch2);
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dispatcherNoCheck = GetCodePtr();
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MOV(32, R(EAX), M(&mips->pc));
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#ifdef _M_IX86
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AND(32, R(EAX), Imm32(Memory::MEMVIEW32_MASK));
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_assert_msg_(CPU, Memory::base != 0, "Memory base bogus");
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MOV(32, R(EAX), MDisp(EAX, (u32)Memory::base));
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#elif _M_X64
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MOV(32, R(EAX), MComplex(RBX, RAX, SCALE_1, 0));
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#endif
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MOV(32, R(EDX), R(EAX));
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AND(32, R(EDX), Imm32(MIPS_EMUHACK_MASK));
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CMP(32, R(EDX), Imm32(MIPS_EMUHACK_OPCODE));
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FixupBranch notfound = J_CC(CC_NZ);
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// IDEA - we have 24 bits, why not just use offsets from base of code?
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if (enableDebug)
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{
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ADD(32, M(&mips->debugCount), Imm8(1));
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}
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//grab from list and jump to it
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AND(32, R(EAX), Imm32(MIPS_EMUHACK_VALUE_MASK));
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#ifdef _M_IX86
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ADD(32, R(EAX), ImmPtr(jit->GetBasePtr()));
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#elif _M_X64
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ADD(64, R(RAX), R(R15));
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#endif
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JMPptr(R(EAX));
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SetJumpTarget(notfound);
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//Ok, no block, let's jit
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ABI_CallFunction((void *)&Jit);
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JMP(dispatcherNoCheck); // Let's just dispatch again, we'll enter the block since we know it's there.
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SetJumpTarget(bail);
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SetJumpTarget(bailCoreState);
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CMP(32, M((void*)&coreState), Imm32(0));
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J_CC(CC_Z, outerLoop, true);
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SetJumpTarget(badCoreState);
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ABI_PopAllCalleeSavedRegsAndAdjustStack();
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RET();
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breakpointBailout = GetCodePtr();
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ABI_PopAllCalleeSavedRegsAndAdjustStack();
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RET();
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} |