mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-24 14:00:03 +00:00
294 lines
8.5 KiB
C++
294 lines
8.5 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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#include "base/logging.h"
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#include "Common/ChunkFile.h"
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#include "Core/Reporting.h"
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#include "Core/MemMap.h"
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#include "Core/MIPS/MIPSTables.h"
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#include "Core/HLE/ReplaceTables.h"
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#include "Core/MIPS/IR/IRFrontend.h"
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#include "Core/MIPS/IR/IRRegCache.h"
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#include "Core/MIPS/IR/IRPassSimplify.h"
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#include "Core/MIPS/IR/IRInterpreter.h"
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namespace MIPSComp {
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IRFrontend::IRFrontend(bool startDefaultPrefix) {
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logBlocks = 0;
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dontLogBlocks = 0;
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js.startDefaultPrefix = true;
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js.hasSetRounding = false;
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// js.currentRoundingFunc = convertS0ToSCRATCH1[0];
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}
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void IRFrontend::DoState(PointerWrap &p) {
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auto s = p.Section("Jit", 1, 2);
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if (!s)
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return;
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p.Do(js.startDefaultPrefix);
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if (s >= 2) {
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p.Do(js.hasSetRounding);
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js.lastSetRounding = 0;
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} else {
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js.hasSetRounding = 1;
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}
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}
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void IRFrontend::FlushAll() {
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FlushPrefixV();
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}
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void IRFrontend::FlushPrefixV() {
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if ((js.prefixSFlag & JitState::PREFIX_DIRTY) != 0) {
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ir.Write(IROp::SetCtrlVFPU, VFPU_CTRL_SPREFIX, ir.AddConstant(js.prefixS));
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js.prefixSFlag = (JitState::PrefixState) (js.prefixSFlag & ~JitState::PREFIX_DIRTY);
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}
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if ((js.prefixTFlag & JitState::PREFIX_DIRTY) != 0) {
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ir.Write(IROp::SetCtrlVFPU, VFPU_CTRL_TPREFIX, ir.AddConstant(js.prefixT));
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js.prefixTFlag = (JitState::PrefixState) (js.prefixTFlag & ~JitState::PREFIX_DIRTY);
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}
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if ((js.prefixDFlag & JitState::PREFIX_DIRTY) != 0) {
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ir.Write(IROp::SetCtrlVFPU, VFPU_CTRL_DPREFIX, ir.AddConstant(js.prefixD));
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js.prefixDFlag = (JitState::PrefixState) (js.prefixDFlag & ~JitState::PREFIX_DIRTY);
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}
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}
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void IRFrontend::EatInstruction(MIPSOpcode op) {
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MIPSInfo info = MIPSGetInfo(op);
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if (info & DELAYSLOT) {
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ERROR_LOG_REPORT_ONCE(ateDelaySlot, JIT, "Ate a branch op.");
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}
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if (js.inDelaySlot) {
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ERROR_LOG_REPORT_ONCE(ateInDelaySlot, JIT, "Ate an instruction inside a delay slot.");
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}
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js.numInstructions++;
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js.compilerPC += 4;
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js.downcountAmount += MIPSGetInstructionCycleEstimate(op);
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}
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void IRFrontend::CompileDelaySlot() {
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js.inDelaySlot = true;
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MIPSOpcode op = GetOffsetInstruction(1);
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MIPSCompileOp(op, this);
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js.inDelaySlot = false;
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}
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bool IRFrontend::CheckRounding() {
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bool cleanSlate = false;
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if (js.hasSetRounding && !js.lastSetRounding) {
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WARN_LOG(JIT, "Detected rounding mode usage, rebuilding jit with checks");
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// Won't loop, since hasSetRounding is only ever set to 1.
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js.lastSetRounding = js.hasSetRounding;
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cleanSlate = true;
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}
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// Drat. The VFPU hit an uneaten prefix at the end of a block.
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if (js.startDefaultPrefix && js.MayHavePrefix()) {
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WARN_LOG(JIT, "An uneaten prefix at end of block");
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logBlocks = 1;
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js.LogPrefix();
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// Let's try that one more time. We won't get back here because we toggled the value.
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js.startDefaultPrefix = false;
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// TODO: Make sure this works.
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// cleanSlate = true;
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}
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return cleanSlate;
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}
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void IRFrontend::Comp_ReplacementFunc(MIPSOpcode op) {
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int index = op.encoding & MIPS_EMUHACK_VALUE_MASK;
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const ReplacementTableEntry *entry = GetReplacementFunc(index);
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if (!entry) {
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ERROR_LOG(HLE, "Invalid replacement op %08x", op.encoding);
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return;
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}
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if (entry->flags & REPFLAG_DISABLED) {
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MIPSCompileOp(Memory::Read_Instruction(GetCompilerPC(), true), this);
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} else if (entry->replaceFunc) {
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FlushAll();
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RestoreRoundingMode();
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ir.Write(IROp::SetPCConst, 0, ir.AddConstant(GetCompilerPC()));
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ir.Write(IROp::CallReplacement, 0, ir.AddConstant(index));
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if (entry->flags & (REPFLAG_HOOKENTER | REPFLAG_HOOKEXIT)) {
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// Compile the original instruction at this address. We ignore cycles for hooks.
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ApplyRoundingMode();
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MIPSCompileOp(Memory::Read_Instruction(GetCompilerPC(), true), this);
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} else {
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ApplyRoundingMode();
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ir.Write(IROp::Downcount, 0, js.downcountAmount & 0xFF, js.downcountAmount >> 8);
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ir.Write(IROp::ExitToReg, 0, MIPS_REG_RA, 0);
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js.compiling = false;
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}
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} else {
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ERROR_LOG(HLE, "Replacement function %s has neither jit nor regular impl", entry->name);
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}
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}
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void IRFrontend::Comp_Generic(MIPSOpcode op) {
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FlushAll();
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ir.Write(IROp::Interpret, 0, ir.AddConstant(op.encoding));
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const MIPSInfo info = MIPSGetInfo(op);
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if ((info & IS_VFPU) != 0 && (info & VFPU_NO_PREFIX) == 0) {
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// If it does eat them, it'll happen in MIPSCompileOp().
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if ((info & OUT_EAT_PREFIX) == 0)
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js.PrefixUnknown();
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}
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}
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// Destroys SCRATCH2
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void IRFrontend::RestoreRoundingMode(bool force) {
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// If the game has never set an interesting rounding mode, we can safely skip this.
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if (force || js.hasSetRounding) {
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ir.Write(IROp::RestoreRoundingMode);
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}
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}
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// Destroys SCRATCH1 and SCRATCH2
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void IRFrontend::ApplyRoundingMode(bool force) {
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// If the game has never set an interesting rounding mode, we can safely skip this.
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if (force || js.hasSetRounding) {
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ir.Write(IROp::ApplyRoundingMode);
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}
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}
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// Destroys SCRATCH1 and SCRATCH2
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void IRFrontend::UpdateRoundingMode() {
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ir.Write(IROp::UpdateRoundingMode);
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}
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void IRFrontend::Comp_DoNothing(MIPSOpcode op) {
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}
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int IRFrontend::Replace_fabsf() {
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Crash();
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return 0;
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}
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u32 IRFrontend::GetCompilerPC() {
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return js.compilerPC;
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}
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MIPSOpcode IRFrontend::GetOffsetInstruction(int offset) {
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return Memory::Read_Instruction(GetCompilerPC() + 4 * offset);
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}
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void IRFrontend::DoJit(u32 em_address, std::vector<IRInst> &instructions, std::vector<u32> &constants) {
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js.cancel = false;
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js.blockStart = em_address;
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js.compilerPC = em_address;
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js.lastContinuedPC = 0;
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js.initialBlockSize = 0;
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js.nextExit = 0;
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js.downcountAmount = 0;
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js.curBlock = nullptr;
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js.compiling = true;
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js.inDelaySlot = false;
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js.PrefixStart();
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ir.Clear();
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js.numInstructions = 0;
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while (js.compiling) {
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MIPSOpcode inst = Memory::Read_Opcode_JIT(GetCompilerPC());
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js.downcountAmount += MIPSGetInstructionCycleEstimate(inst);
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MIPSCompileOp(inst, this);
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js.compilerPC += 4;
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js.numInstructions++;
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if (ir.GetConstants().size() > 64) {
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// Need to break the block
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ir.Write(IROp::ExitToConst, ir.AddConstant(js.compilerPC));
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js.compiling = false;
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}
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}
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IRWriter simplified;
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IRWriter *code = &ir;
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if (true) {
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static const IRPassFunc passes[] = {
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&OptimizeFPMoves,
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&PropagateConstants,
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&PurgeTemps,
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// &ReorderLoadStore,
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// &MergeLoadStore,
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// &ThreeOpToTwoOp,
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};
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if (IRApplyPasses(passes, ARRAY_SIZE(passes), ir, simplified))
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logBlocks = 1;
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code = &simplified;
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//if (ir.GetInstructions().size() >= 24)
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// logBlocks = 1;
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}
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instructions = code->GetInstructions();
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constants = code->GetConstants();
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if (logBlocks > 0 && dontLogBlocks == 0) {
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char temp2[256];
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ILOG("=============== mips %08x ===============", em_address);
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for (u32 cpc = em_address; cpc != GetCompilerPC() + 4; cpc += 4) {
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temp2[0] = 0;
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MIPSDisAsm(Memory::Read_Opcode_JIT(cpc), cpc, temp2, true);
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ILOG("M: %08x %s", cpc, temp2);
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}
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}
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if (logBlocks > 0 && dontLogBlocks == 0) {
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ILOG("=============== Original IR (%d instructions, %d const) ===============", (int)ir.GetInstructions().size(), (int)ir.GetConstants().size());
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for (size_t i = 0; i < ir.GetInstructions().size(); i++) {
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char buf[256];
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DisassembleIR(buf, sizeof(buf), ir.GetInstructions()[i], &ir.GetConstants()[0]);
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ILOG("%s", buf);
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}
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ILOG("=============== end =================");
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}
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if (logBlocks > 0 && dontLogBlocks == 0) {
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ILOG("=============== IR (%d instructions, %d const) ===============", (int)code->GetInstructions().size(), (int)code->GetConstants().size());
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for (size_t i = 0; i < code->GetInstructions().size(); i++) {
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char buf[256];
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DisassembleIR(buf, sizeof(buf), code->GetInstructions()[i], &code->GetConstants()[0]);
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ILOG("%s", buf);
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}
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ILOG("=============== end =================");
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}
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if (logBlocks > 0)
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logBlocks--;
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if (dontLogBlocks > 0)
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dontLogBlocks--;
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}
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void IRFrontend::Comp_RunBlock(MIPSOpcode op) {
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// This shouldn't be necessary, the dispatcher should catch us before we get here.
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ERROR_LOG(JIT, "Comp_RunBlock should never be reached!");
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}
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} // namespace
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