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https://github.com/RPCS3/rpcs3.git
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Transactions: move loops inside
Rewrite loops in assembler (minor optimization)
This commit is contained in:
Nekotekina
parent
f6f45b8699
commit
33a1c743a4
@ -7,7 +7,7 @@ asmjit::JitRuntime& asmjit::get_global_runtime()
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return g_rt;
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}
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void asmjit::build_transaction_enter(asmjit::X86Assembler& c, asmjit::Label fallback)
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asmjit::Label asmjit::build_transaction_enter(asmjit::X86Assembler& c, asmjit::Label fallback)
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{
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Label fall = c.newLabel();
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Label begin = c.newLabel();
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@ -18,6 +18,7 @@ void asmjit::build_transaction_enter(asmjit::X86Assembler& c, asmjit::Label fall
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c.align(kAlignCode, 16);
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c.bind(begin);
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c.xbegin(fall);
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return begin;
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}
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void asmjit::build_transaction_abort(asmjit::X86Assembler& c, unsigned char code)
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@ -12,8 +12,8 @@ namespace asmjit
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// Should only be used to build global functions
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JitRuntime& get_global_runtime();
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// Emit xbegin and adjacent loop
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void build_transaction_enter(X86Assembler& c, Label fallback);
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// Emit xbegin and adjacent loop, return label at xbegin
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Label build_transaction_enter(X86Assembler& c, Label fallback);
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// Emit xabort
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void build_transaction_abort(X86Assembler& c, unsigned char code);
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@ -944,8 +944,23 @@ static T ppu_load_acquire_reservation(ppu_thread& ppu, u32 addr)
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ppu.raddr = addr;
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while (g_use_rtm)
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{
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ppu.rtime = vm::reservation_acquire(addr, sizeof(T));
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ppu.rdata = data;
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if (LIKELY(vm::reservation_acquire(addr, sizeof(T)) == ppu.rtime))
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{
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return static_cast<T>(ppu.rdata);
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}
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else
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{
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_mm_pause();
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}
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}
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// Do several attemps
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for (uint i = 0; g_use_rtm || i < 5; i++)
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for (uint i = 0; i < 5; i++)
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{
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ppu.rtime = vm::reservation_acquire(addr, sizeof(T));
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_mm_lfence();
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@ -981,7 +996,7 @@ extern u64 ppu_ldarx(ppu_thread& ppu, u32 addr)
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return ppu_load_acquire_reservation<u64>(ppu, addr);
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}
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const auto ppu_stwcx_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, u64 rdata, u32 value)>([](asmjit::X86Assembler& c, auto& args)
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const auto ppu_stwcx_tx = build_function_asm<bool(*)(u32 raddr, u64 rtime, u64 rdata, u32 value)>([](asmjit::X86Assembler& c, auto& args)
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{
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using namespace asmjit;
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@ -998,9 +1013,10 @@ const auto ppu_stwcx_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, u64 rd
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c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0], 3));
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c.bswap(args[2].r32());
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c.bswap(args[3].r32());
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c.mov(args[0].r32(), 5);
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// Begin transaction
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build_transaction_enter(c, fall);
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Label begin = build_transaction_enter(c, fall);
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c.cmp(x86::qword_ptr(x86::r10), args[1]);
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c.jne(fail);
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c.cmp(x86::dword_ptr(x86::r11), args[2].r32());
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@ -1017,14 +1033,18 @@ const auto ppu_stwcx_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, u64 rd
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// Touch memory after transaction failure
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c.bind(fall);
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c.sub(args[0].r32(), 1);
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c.jz(fail);
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c.sar(x86::eax, 24);
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c.js(fail);
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c.lock().add(x86::dword_ptr(x86::r11), 0);
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c.lock().add(x86::qword_ptr(x86::r10), 0);
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c.sar(x86::eax, 24);
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c.ret();
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c.jmp(begin);
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c.bind(fail);
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build_transaction_abort(c, 0xff);
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c.int3();
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c.xor_(x86::eax, x86::eax);
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c.ret();
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});
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extern bool ppu_stwcx(ppu_thread& ppu, u32 addr, u32 reg_value)
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@ -1039,27 +1059,14 @@ extern bool ppu_stwcx(ppu_thread& ppu, u32 addr, u32 reg_value)
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if (g_use_rtm)
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{
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// Do several attempts (TODO)
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for (u32 i = 0; i < 5; i++)
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if (ppu_stwcx_tx(addr, ppu.rtime, ppu.rdata, reg_value))
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{
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const int r = ppu_stwcx_tx(addr, ppu.rtime, ppu.rdata, reg_value);
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if (r > 0)
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{
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vm::reservation_notifier(addr, sizeof(u32)).notify_all();
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ppu.raddr = 0;
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return true;
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}
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if (r < 0)
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{
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// Reservation lost
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ppu.raddr = 0;
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return false;
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}
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vm::reservation_notifier(addr, sizeof(u32)).notify_all();
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ppu.raddr = 0;
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return true;
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}
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// Give up
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// Reservation lost
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ppu.raddr = 0;
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return false;
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}
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@ -1078,7 +1085,7 @@ extern bool ppu_stwcx(ppu_thread& ppu, u32 addr, u32 reg_value)
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return result;
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}
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const auto ppu_stdcx_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, u64 rdata, u64 value)>([](asmjit::X86Assembler& c, auto& args)
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const auto ppu_stdcx_tx = build_function_asm<bool(*)(u32 raddr, u64 rtime, u64 rdata, u64 value)>([](asmjit::X86Assembler& c, auto& args)
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{
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using namespace asmjit;
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@ -1095,9 +1102,10 @@ const auto ppu_stdcx_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, u64 rd
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c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0], 3));
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c.bswap(args[2]);
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c.bswap(args[3]);
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c.mov(args[0].r32(), 5);
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// Begin transaction
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build_transaction_enter(c, fall);
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Label begin = build_transaction_enter(c, fall);
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c.cmp(x86::qword_ptr(x86::r10), args[1]);
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c.jne(fail);
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c.cmp(x86::qword_ptr(x86::r11), args[2]);
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@ -1114,14 +1122,18 @@ const auto ppu_stdcx_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, u64 rd
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// Touch memory after transaction failure
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c.bind(fall);
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c.sub(args[0].r32(), 1);
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c.jz(fail);
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c.sar(x86::eax, 24);
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c.js(fail);
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c.lock().add(x86::qword_ptr(x86::r11), 0);
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c.lock().add(x86::qword_ptr(x86::r10), 0);
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c.sar(x86::eax, 24);
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c.ret();
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c.jmp(begin);
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c.bind(fail);
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build_transaction_abort(c, 0xff);
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c.int3();
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c.xor_(x86::eax, x86::eax);
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c.ret();
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});
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extern bool ppu_stdcx(ppu_thread& ppu, u32 addr, u64 reg_value)
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@ -1136,27 +1148,14 @@ extern bool ppu_stdcx(ppu_thread& ppu, u32 addr, u64 reg_value)
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if (g_use_rtm)
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{
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// Do several attempts (TODO)
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for (u32 i = 0; i < 5; i++)
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if (ppu_stdcx_tx(addr, ppu.rtime, ppu.rdata, reg_value))
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{
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const int r = ppu_stdcx_tx(addr, ppu.rtime, ppu.rdata, reg_value);
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if (r > 0)
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{
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vm::reservation_notifier(addr, sizeof(u64)).notify_all();
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ppu.raddr = 0;
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return true;
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}
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if (r < 0)
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{
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// Reservation lost
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ppu.raddr = 0;
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return false;
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}
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vm::reservation_notifier(addr, sizeof(u64)).notify_all();
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ppu.raddr = 0;
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return true;
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}
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// Give up
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// Reservation lost
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ppu.raddr = 0;
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return false;
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}
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@ -213,7 +213,7 @@ namespace spu
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}
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}
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const auto spu_putllc_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, const void* _old, const void* _new)>([](asmjit::X86Assembler& c, auto& args)
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const auto spu_putllc_tx = build_function_asm<bool(*)(u32 raddr, u64 rtime, const void* _old, const void* _new)>([](asmjit::X86Assembler& c, auto& args)
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{
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using namespace asmjit;
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@ -228,6 +228,7 @@ const auto spu_putllc_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, const
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c.lea(x86::r11, x86::qword_ptr(x86::r11, args[0]));
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c.shr(args[0], 4);
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c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0]));
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c.mov(args[0].r32(), 3);
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// Prepare data (Windows has only 6 volatile vector registers)
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c.vmovups(x86::ymm0, x86::yword_ptr(args[2], 0));
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@ -245,7 +246,7 @@ const auto spu_putllc_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, const
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#endif
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// Begin transaction
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build_transaction_enter(c, fall);
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Label begin = build_transaction_enter(c, fall);
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c.cmp(x86::qword_ptr(x86::r10), args[1]);
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c.jne(fail);
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c.vxorps(x86::ymm0, x86::ymm0, x86::yword_ptr(x86::r11, 0));
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@ -282,14 +283,22 @@ const auto spu_putllc_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, const
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// Touch memory after transaction failure
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c.bind(fall);
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c.sub(args[0].r32(), 1);
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c.jz(fail);
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c.sar(x86::eax, 24);
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c.js(fail);
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c.lock().add(x86::qword_ptr(x86::r11), 0);
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c.lock().add(x86::qword_ptr(x86::r10), 0);
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c.sar(x86::eax, 24);
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c.ret();
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#ifdef _WIN32
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c.vmovups(x86::ymm4, x86::yword_ptr(args[3], 0));
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c.vmovups(x86::ymm5, x86::yword_ptr(args[3], 96));
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#endif
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c.jmp(begin);
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c.bind(fail);
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build_transaction_abort(c, 0xff);
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c.int3();
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c.xor_(x86::eax, x86::eax);
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c.ret();
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});
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const auto spu_getll_tx = build_function_asm<u64(*)(u32 raddr, void* rdata)>([](asmjit::X86Assembler& c, auto& args)
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@ -308,7 +317,7 @@ const auto spu_getll_tx = build_function_asm<u64(*)(u32 raddr, void* rdata)>([](
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c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0]));
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// Begin transaction
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build_transaction_enter(c, fall);
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Label begin = build_transaction_enter(c, fall);
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c.mov(x86::rax, x86::qword_ptr(x86::r10));
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c.vmovaps(x86::ymm0, x86::yword_ptr(x86::r11, 0));
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c.vmovaps(x86::ymm1, x86::yword_ptr(x86::r11, 32));
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@ -324,13 +333,13 @@ const auto spu_getll_tx = build_function_asm<u64(*)(u32 raddr, void* rdata)>([](
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// Touch memory after transaction failure
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c.bind(fall);
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c.pause();
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c.mov(x86::rax, x86::qword_ptr(x86::r11));
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c.mov(x86::rax, x86::qword_ptr(x86::r10));
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c.mov(x86::eax, 1);
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c.ret();
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c.jmp(begin);
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});
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const auto spu_putlluc_tx = build_function_asm<bool(*)(u32 raddr, const void* rdata)>([](asmjit::X86Assembler& c, auto& args)
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const auto spu_putlluc_tx = build_function_asm<void(*)(u32 raddr, const void* rdata)>([](asmjit::X86Assembler& c, auto& args)
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{
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using namespace asmjit;
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@ -352,7 +361,7 @@ const auto spu_putlluc_tx = build_function_asm<bool(*)(u32 raddr, const void* rd
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c.vmovups(x86::ymm3, x86::yword_ptr(args[1], 96));
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// Begin transaction
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build_transaction_enter(c, fall);
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Label begin = build_transaction_enter(c, fall);
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c.vmovaps(x86::yword_ptr(x86::r11, 0), x86::ymm0);
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c.vmovaps(x86::yword_ptr(x86::r11, 32), x86::ymm1);
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c.vmovaps(x86::yword_ptr(x86::r11, 64), x86::ymm2);
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@ -364,15 +373,14 @@ const auto spu_putlluc_tx = build_function_asm<bool(*)(u32 raddr, const void* rd
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c.mov(x86::qword_ptr(x86::r10), x86::rax);
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c.xend();
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c.vzeroupper();
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c.mov(x86::eax, 1);
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c.ret();
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// Touch memory after transaction failure
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c.bind(fall);
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c.pause();
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c.lock().add(x86::qword_ptr(x86::r11), 0);
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c.lock().add(x86::qword_ptr(x86::r10), 0);
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c.xor_(x86::eax, x86::eax);
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c.ret();
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c.jmp(begin);
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});
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void spu_int_ctrl_t::set(u64 ints)
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@ -1042,20 +1050,12 @@ void SPUThread::do_putlluc(const spu_mfc_cmd& args)
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auto& data = vm::_ref<decltype(rdata)>(addr);
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const auto to_write = _ref<decltype(rdata)>(args.lsa & 0x3ffff);
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vm::reservation_acquire(addr, 128);
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// Store unconditionally
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while (g_use_rtm)
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if (g_use_rtm)
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{
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if (spu_putlluc_tx(addr, to_write.data()))
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{
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vm::reservation_notifier(addr, 128).notify_all();
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tx_success++;
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return;
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}
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busy_wait(300);
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tx_failure++;
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spu_putlluc_tx(addr, to_write.data());
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vm::reservation_notifier(addr, 128).notify_all();
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return;
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}
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vm::writer_lock lock(0);
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@ -1248,19 +1248,9 @@ bool SPUThread::process_mfc_cmd(spu_mfc_cmd args)
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}
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}
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while (g_use_rtm)
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if (g_use_rtm)
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{
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rtime = spu_getll_tx(raddr, rdata.data());
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if (rtime & 1)
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{
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tx_failure++;
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busy_wait(300);
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continue;
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}
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tx_success++;
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break;
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}
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// Do several attemps
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@ -1312,28 +1302,13 @@ bool SPUThread::process_mfc_cmd(spu_mfc_cmd args)
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{
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if (g_use_rtm)
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{
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// Do several attempts (TODO)
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for (u32 i = 0; i < 3; i++)
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if (spu_putllc_tx(raddr, rtime, rdata.data(), to_write.data()))
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{
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const int r = spu_putllc_tx(raddr, rtime, rdata.data(), to_write.data());
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if (r > 0)
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{
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vm::reservation_notifier(raddr, 128).notify_all();
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result = true;
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tx_success++;
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break;
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}
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if (r < 0)
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{
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// Reservation lost
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break;
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}
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// Don't fallback to heavyweight lock, just give up
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tx_failure++;
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vm::reservation_notifier(raddr, 128).notify_all();
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result = true;
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}
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// Don't fallback to heavyweight lock, just give up
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}
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else if (rdata == data)
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{
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