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https://github.com/RPCS3/rpcs3.git
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SPU ASMJIT: übertrampolines and spu_runtime
Use opt-out shared spu_runtime to save memory (Option: SPU Shared Runtime) Implement "übertrampolines" for dispatching compiled blocks Patch fixed branch points to use trampolines after check failure
This commit is contained in:
Nekotekina
parent
8ca33bcb94
commit
3ffafb741c
7 changed files with 329 additions and 61 deletions
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@ -31,12 +31,6 @@ std::unique_ptr<spu_recompiler_base> spu_recompiler_base::make_asmjit_recompiler
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spu_runtime::spu_runtime()
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{
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if (g_cfg.core.spu_debug)
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{
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fs::file log(Emu.GetCachePath() + "SPUJIT.log", fs::rewrite);
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log.write(fmt::format("SPU JIT Log...\n\nTitle: %s\nTitle ID: %s\n\n", Emu.GetTitle().c_str(), Emu.GetTitleID().c_str()));
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}
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LOG_SUCCESS(SPU, "SPU Recompiler Runtime (ASMJIT) initialized...");
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// Initialize lookup table
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@ -51,8 +45,23 @@ spu_runtime::spu_runtime()
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spu_recompiler::spu_recompiler(SPUThread& spu)
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: spu_recompiler_base(spu)
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, m_rt(std::make_shared<asmjit::JitRuntime>())
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{
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if (!g_cfg.core.spu_shared_runtime)
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{
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m_spurt = std::make_shared<spu_runtime>();
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}
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}
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spu_function_t spu_recompiler::get(u32 lsa)
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{
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// Initialize if necessary
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if (!m_spurt)
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{
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m_spurt = fxm::get_always<spu_runtime>();
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}
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// Simple atomic read
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return m_spurt->m_dispatcher[lsa / 4];
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}
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spu_function_t spu_recompiler::compile(const std::vector<u32>& func)
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@ -63,6 +72,24 @@ spu_function_t spu_recompiler::compile(const std::vector<u32>& func)
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m_spurt = fxm::get_always<spu_runtime>();
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}
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// Don't lock without shared runtime
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std::unique_lock<shared_mutex> lock(m_spurt->m_mutex, std::defer_lock);
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if (g_cfg.core.spu_shared_runtime)
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{
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lock.lock();
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}
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// Try to find existing function
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{
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const auto found = m_spurt->m_map.find(func);
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if (found != m_spurt->m_map.end() && found->second)
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{
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return found->second;
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}
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}
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using namespace asmjit;
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SPUDisAsm dis_asm(CPUDisAsm_InterpreterMode);
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@ -78,8 +105,9 @@ spu_function_t spu_recompiler::compile(const std::vector<u32>& func)
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fmt::append(log, "========== SPU BLOCK 0x%05x (size %u) ==========\n\n", func[0], func.size() - 1);
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}
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asmjit::CodeHolder code;
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code.init(m_rt->getCodeInfo());
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CodeHolder code;
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code.init(m_spurt->m_jitrt.getCodeInfo());
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code._globalHints = asmjit::CodeEmitter::kHintOptimizedAlign;
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X86Assembler compiler(&code);
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this->c = &compiler;
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@ -626,7 +654,7 @@ spu_function_t spu_recompiler::compile(const std::vector<u32>& func)
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c->align(kAlignCode, 16);
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c->bind(label_diff);
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c->inc(SPU_OFF_64(block_failure));
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c->jmp(asmjit::imm_ptr(&spu_recompiler_base::dispatch));
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c->jmp(imm_ptr(&spu_recompiler_base::dispatch));
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for (auto&& work : decltype(after)(std::move(after)))
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{
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@ -648,15 +676,228 @@ spu_function_t spu_recompiler::compile(const std::vector<u32>& func)
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// Compile and get function address
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spu_function_t fn;
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if (m_rt->add(&fn, &code))
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if (m_spurt->m_jitrt.add(&fn, &code))
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{
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LOG_FATAL(SPU, "Failed to build a function");
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}
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// Register function
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m_spurt->m_map[func] = fn;
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// Generate a dispatcher (übertrampoline)
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std::vector<u32> addrv{func[0]};
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const auto beg = m_spurt->m_map.lower_bound(addrv);
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addrv[0] += 4;
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const auto end = m_spurt->m_map.lower_bound(addrv);
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const u32 size0 = std::distance(beg, end);
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if (size0 == 1)
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{
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m_spurt->m_dispatcher[func[0] / 4] = fn;
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}
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else
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{
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CodeHolder code;
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code.init(m_spurt->m_jitrt.getCodeInfo());
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X86Assembler compiler(&code);
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this->c = &compiler;
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if (g_cfg.core.spu_debug)
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{
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// Set logger
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code.setLogger(&logger);
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}
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compiler.comment("\n\nTrampoline:\n\n");
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struct work
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{
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u32 size;
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u32 level;
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Label label;
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std::map<std::vector<u32>, spu_function_t>::iterator beg;
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std::map<std::vector<u32>, spu_function_t>::iterator end;
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};
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std::vector<work> workload;
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workload.reserve(size0);
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workload.emplace_back();
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workload.back().size = size0;
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workload.back().level = 1;
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workload.back().beg = beg;
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workload.back().end = end;
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for (std::size_t i = 0; i < workload.size(); i++)
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{
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// Get copy of the workload info
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work w = workload[i];
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// Split range in two parts
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auto it = w.beg;
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auto it2 = w.beg;
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u32 size1 = w.size / 2;
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u32 size2 = w.size - size1;
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std::advance(it2, w.size / 2);
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while (true)
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{
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it = it2;
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size1 = w.size - size2;
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// Adjust ranges (forward)
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while (it != w.end && w.beg->first.at(w.level) == it->first.at(w.level))
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{
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it++;
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size1++;
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}
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if (it == w.end)
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{
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// Cannot split: words are identical within the range at this level
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w.level++;
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}
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else
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{
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size2 = w.size - size1;
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break;
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}
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}
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// Value for comparison
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const u32 x = it->first.at(w.level);
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// Adjust ranges (backward)
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while (true)
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{
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it--;
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if (it->first.at(w.level) != x)
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{
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it++;
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break;
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}
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verify(HERE), it != w.beg;
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size1--;
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size2++;
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}
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if (w.label.isValid())
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{
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c->align(kAlignCode, 16);
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c->bind(w.label);
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}
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c->cmp(x86::dword_ptr(*ls, func[0] + (w.level - 1) * 4), x);
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// Low subrange target label
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Label label_below;
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if (size1 == 1)
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{
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label_below = c->newLabel();
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c->jb(label_below);
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}
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else
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{
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workload.push_back(w);
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workload.back().end = it;
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workload.back().size = size1;
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workload.back().label = c->newLabel();
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c->jb(workload.back().label);
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}
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// Second subrange target
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const auto target = it->second ? it->second : &dispatch;
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if (size2 == 1)
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{
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c->jmp(imm_ptr(target));
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}
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else
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{
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it2 = it;
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// Select additional midrange for equality comparison
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while (it2 != w.end && it2->first.at(w.level) == x)
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{
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size2--;
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it2++;
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}
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if (it2 != w.end)
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{
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// High subrange target label
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Label label_above;
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if (size2 == 1)
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{
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label_above = c->newLabel();
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c->ja(label_above);
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}
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else
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{
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workload.push_back(w);
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workload.back().beg = it2;
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workload.back().size = size2;
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workload.back().label = c->newLabel();
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c->ja(workload.back().label);
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}
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const u32 size3 = w.size - size1 - size2;
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if (size3 == 1)
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{
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c->jmp(imm_ptr(target));
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}
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else
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{
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workload.push_back(w);
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workload.back().beg = it;
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workload.back().end = it2;
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workload.back().size = size3;
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workload.back().label = c->newLabel();
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c->jmp(workload.back().label);
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}
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if (label_above.isValid())
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{
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c->bind(label_above);
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c->jmp(imm_ptr(it2->second ? it2->second : &dispatch));
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}
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}
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else
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{
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workload.push_back(w);
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workload.back().beg = it;
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workload.back().size = w.size - size1;
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workload.back().label = c->newLabel();
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c->jmp(workload.back().label);
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}
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}
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if (label_below.isValid())
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{
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c->bind(label_below);
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c->jmp(imm_ptr(w.beg->second ? w.beg->second : &dispatch));
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}
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}
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spu_function_t tr;
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if (m_spurt->m_jitrt.add(&tr, &code))
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{
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LOG_FATAL(SPU, "Failed to build a trampoline");
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}
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m_spurt->m_dispatcher[func[0] / 4] = tr;
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}
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if (g_cfg.core.spu_debug)
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{
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// Add ASMJIT logs
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fmt::append(log, "{%s} Address: %p\n\n", m_spu.get_name(), fn);
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fmt::append(log, "Address: %p (%p)\n\n", fn, +m_spurt->m_dispatcher[func[0] / 4]);
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log += logger.getString();
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log += "\n\n\n";
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@ -731,25 +972,24 @@ void spu_recompiler::branch_fixed(u32 target)
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Label patch_point = c->newLabel();
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c->lea(*qw0, x86::qword_ptr(patch_point));
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c->mov(SPU_OFF_32(pc), target);
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c->align(kAlignCode, 16);
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// Need to emit exactly one executable instruction within 8 bytes
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c->align(kAlignCode, 8);
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c->bind(patch_point);
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const auto result = m_spu.jit_map.emplace(block(m_spu, target), nullptr);
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const auto result = m_spurt->m_map.emplace(block(m_spu, target), nullptr);
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if (result.second || !result.first->second)
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{
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if (result.first->first.size())
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{
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// Target block hasn't been compiled yet, record overwriting position
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c->mov(*ls, imm_ptr(&*result.first));
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c->jmp(imm_ptr(&spu_recompiler_base::branch));
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}
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else
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{
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// SPURS Workload entry point or similar thing
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c->mov(x86::r10, x86::qword_ptr(*cpu, offset32(&SPUThread::jit_dispatcher) + target * 2));
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c->xor_(qw0->r32(), qw0->r32());
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c->jmp(x86::r10);
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// SPURS Workload entry point or similar thing (emit 8-byte NOP)
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c->dq(0x841f0f);
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}
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}
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else
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@ -757,7 +997,14 @@ void spu_recompiler::branch_fixed(u32 target)
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c->jmp(imm_ptr(result.first->second));
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}
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c->align(kAlignCode, 16);
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// Branch via dispatcher (occupies 16 bytes including padding)
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c->align(kAlignCode, 8);
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c->mov(x86::rax, x86::qword_ptr(*cpu, offset32(&SPUThread::jit_dispatcher) + target * 2));
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c->xor_(qw0->r32(), qw0->r32());
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c->jmp(x86::rax);
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c->align(kAlignCode, 8);
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c->dq(reinterpret_cast<u64>(&*result.first));
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c->dq(reinterpret_cast<u64>(result.first->second));
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}
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void spu_recompiler::branch_indirect(spu_opcode_t op)
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@ -32,13 +32,13 @@ public:
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// SPU ASMJIT Recompiler
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class spu_recompiler : public spu_recompiler_base
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{
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const std::shared_ptr<asmjit::JitRuntime> m_rt;
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std::shared_ptr<spu_runtime> m_spurt;
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public:
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spu_recompiler(class SPUThread& spu);
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virtual spu_function_t get(u32 lsa) override;
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virtual spu_function_t compile(const std::vector<u32>& func) override;
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private:
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@ -16,9 +16,6 @@ spu_recompiler_base::spu_recompiler_base(SPUThread& spu)
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{
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// Initialize lookup table
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spu.jit_dispatcher.fill(&dispatch);
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// Initialize "empty" block
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spu.jit_map[std::vector<u32>()] = &dispatch;
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}
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spu_recompiler_base::~spu_recompiler_base()
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@ -27,73 +24,89 @@ spu_recompiler_base::~spu_recompiler_base()
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void spu_recompiler_base::dispatch(SPUThread& spu, void*, u8* rip)
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{
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const auto result = spu.jit_map.emplace(block(spu, spu.pc), nullptr);
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if (result.second || !result.first->second)
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// If check failed after direct branch, patch it with single NOP
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if (rip)
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{
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result.first->second = spu.jit->compile(result.first->first);
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#ifdef _MSC_VER
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*(volatile u64*)(rip) = 0x841f0f;
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#else
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__atomic_store_n(reinterpret_cast<u64*>(rip), 0x841f0f, __ATOMIC_RELAXED);
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#endif
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}
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spu.jit_dispatcher[spu.pc / 4] = result.first->second;
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const auto func = spu.jit->get(spu.pc);
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// First attempt (load new trampoline and retry)
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if (func != spu.jit_dispatcher[spu.pc / 4])
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{
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spu.jit_dispatcher[spu.pc / 4] = func;
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return;
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}
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// Second attempt (recover from the recursion after repeated unsuccessful trampoline call)
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if (spu.block_counter != spu.block_recover && func != &dispatch)
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{
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spu.block_recover = spu.block_counter;
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return;
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}
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// Compile
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verify(HERE), spu.jit->compile(block(spu, spu.pc));
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spu.jit_dispatcher[spu.pc / 4] = spu.jit->get(spu.pc);
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}
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void spu_recompiler_base::branch(SPUThread& spu, std::pair<const std::vector<u32>, spu_function_t>* pair, u8* rip)
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void spu_recompiler_base::branch(SPUThread& spu, void*, u8* rip)
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{
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const auto pair = *reinterpret_cast<std::pair<const std::vector<u32>, spu_function_t>**>(rip + 24);
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spu.pc = pair->first[0];
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if (!pair->second)
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{
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pair->second = spu.jit->compile(pair->first);
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}
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const auto func = pair->second ? pair->second : spu.jit->compile(pair->first);
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spu.jit_dispatcher[spu.pc / 4] = pair->second;
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verify(HERE), func, pair->second == func;
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// Overwrite function address
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reinterpret_cast<atomic_t<spu_function_t>*>(rip + 32)->store(func);
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// Overwrite jump to this function with jump to the compiled function
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const s64 rel = reinterpret_cast<u64>(pair->second) - reinterpret_cast<u64>(rip) - 5;
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const s64 rel = reinterpret_cast<u64>(func) - reinterpret_cast<u64>(rip) - 5;
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alignas(8) u8 bytes[8];
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if (rel >= INT32_MIN && rel <= INT32_MAX)
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{
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const s64 rel8 = (rel + 5) - 2;
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alignas(8) u8 bytes[8];
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if (rel8 >= INT8_MIN && rel8 <= INT8_MAX)
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{
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bytes[0] = 0xeb; // jmp rel8
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bytes[1] = static_cast<s8>(rel8);
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std::memset(bytes + 2, 0x90, 5);
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bytes[7] = 0x48;
|
||||
std::memset(bytes + 2, 0x90, 6);
|
||||
}
|
||||
else
|
||||
{
|
||||
bytes[0] = 0xe9; // jmp rel32
|
||||
std::memcpy(bytes + 1, &rel, 4);
|
||||
std::memset(bytes + 5, 0x90, 2);
|
||||
bytes[7] = 0x48;
|
||||
std::memset(bytes + 5, 0x90, 3);
|
||||
}
|
||||
|
||||
#ifdef _MSC_VER
|
||||
*(volatile u64*)(rip) = *reinterpret_cast<u64*>(+bytes);
|
||||
#else
|
||||
__atomic_store_n(reinterpret_cast<u64*>(rip), *reinterpret_cast<u64*>(+bytes), __ATOMIC_RELAXED);
|
||||
#endif
|
||||
}
|
||||
else
|
||||
{
|
||||
alignas(16) u8 bytes[16];
|
||||
|
||||
bytes[0] = 0xff; // jmp [rip+2]
|
||||
bytes[0] = 0xff; // jmp [rip+26]
|
||||
bytes[1] = 0x25;
|
||||
bytes[2] = 0x02;
|
||||
bytes[2] = 0x1a;
|
||||
bytes[3] = 0x00;
|
||||
bytes[4] = 0x00;
|
||||
bytes[5] = 0x00;
|
||||
bytes[6] = 0x48; // mov rax, imm64 (not executed)
|
||||
bytes[7] = 0xb8;
|
||||
std::memcpy(bytes + 8, &pair->second, 8);
|
||||
|
||||
reinterpret_cast<atomic_t<u128>*>(rip)->store(*reinterpret_cast<u128*>(+bytes));
|
||||
bytes[6] = 0x90;
|
||||
bytes[7] = 0x90;
|
||||
}
|
||||
|
||||
#ifdef _MSC_VER
|
||||
*(volatile u64*)(rip) = *reinterpret_cast<u64*>(+bytes);
|
||||
#else
|
||||
__atomic_store_n(reinterpret_cast<u64*>(rip), *reinterpret_cast<u64*>(+bytes), __ATOMIC_RELAXED);
|
||||
#endif
|
||||
}
|
||||
|
||||
std::vector<u32> spu_recompiler_base::block(SPUThread& spu, u32 lsa)
|
||||
|
|
|
|||
|
|
@ -15,6 +15,9 @@ public:
|
|||
|
||||
virtual ~spu_recompiler_base();
|
||||
|
||||
// Get pointer to the trampoline at given position
|
||||
virtual spu_function_t get(u32 lsa) = 0;
|
||||
|
||||
// Compile function
|
||||
virtual spu_function_t compile(const std::vector<u32>& func) = 0;
|
||||
|
||||
|
|
@ -22,7 +25,7 @@ public:
|
|||
static void dispatch(SPUThread&, void*, u8*);
|
||||
|
||||
// Direct branch fallback for non-compiled destination
|
||||
static void branch(SPUThread&, std::pair<const std::vector<u32>, spu_function_t>*, u8* rip);
|
||||
static void branch(SPUThread&, void*, u8*);
|
||||
|
||||
// Get the block at specified address
|
||||
static std::vector<u32> block(SPUThread&, u32 lsa);
|
||||
|
|
|
|||
|
|
@ -594,8 +594,6 @@ public:
|
|||
|
||||
std::unique_ptr<class spu_recompiler_base> jit; // Recompiler instance
|
||||
|
||||
std::map<std::vector<u32>, spu_function_t> jit_map; // All compiled blocks (first u32 is addr)
|
||||
|
||||
u64 block_counter = 0;
|
||||
u64 block_recover = 0;
|
||||
u64 block_failure = 0;
|
||||
|
|
|
|||
|
|
@ -841,6 +841,12 @@ void Emulator::Load(bool add_only)
|
|||
LOG_NOTICE(LOADER, "Elf path: %s", argv[0]);
|
||||
}
|
||||
|
||||
if (g_cfg.core.spu_debug)
|
||||
{
|
||||
fs::file log(Emu.GetCachePath() + "SPUJIT.log", fs::rewrite);
|
||||
log.write(fmt::format("SPU JIT Log\n\nTitle: %s\nTitle ID: %s\n\n", Emu.GetTitle(), Emu.GetTitleID()));
|
||||
}
|
||||
|
||||
ppu_load_exec(ppu_exec);
|
||||
|
||||
fxm::import<GSRender>(Emu.GetCallbacks().get_gs_render); // TODO: must be created in appropriate sys_rsx syscall
|
||||
|
|
|
|||
|
|
@ -302,6 +302,7 @@ struct cfg_root : cfg::node
|
|||
cfg::_int<0, 6> preferred_spu_threads{this, "Preferred SPU Threads", 0}; //Numnber of hardware threads dedicated to heavy simultaneous spu tasks
|
||||
cfg::_int<0, 16> spu_delay_penalty{this, "SPU delay penalty", 3}; //Number of milliseconds to block a thread if a virtual 'core' isn't free
|
||||
cfg::_bool spu_loop_detection{this, "SPU loop detection", true}; //Try to detect wait loops and trigger thread yield
|
||||
cfg::_bool spu_shared_runtime{this, "SPU Shared Runtime", true}; // Share compiled SPU functions between all threads
|
||||
|
||||
cfg::_enum<lib_loading_type> lib_loading{this, "Lib Loader", lib_loading_type::liblv2only};
|
||||
cfg::_bool hook_functions{this, "Hook static functions"};
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue