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Transactions: touch memory only after a failure

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Minor optimization
This commit is contained in:
Nekotekina 2018-05-17 22:19:26 +03:00
parent 0b1c8bc676
commit 67391322f4
2 changed files with 20 additions and 37 deletions
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27
rpcs3/Emu/Cell/SPUThread.cpp
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@ -229,13 +229,6 @@ const auto spu_putllc_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, const
c.shr(args[0], 4);
c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0]));
// Touch memory (heavyweight)
c.lock().add(x86::qword_ptr(x86::r11), 0);
c.xor_(x86::eax, x86::eax);
c.lock().xadd(x86::qword_ptr(x86::r10), x86::rax);
c.cmp(x86::rax, args[1]);
c.jne(fail);
// Prepare data (Windows has only 6 volatile vector registers)
c.vmovups(x86::ymm0, x86::yword_ptr(args[2], 0));
c.vmovups(x86::ymm1, x86::yword_ptr(args[2], 32));
@ -287,14 +280,16 @@ const auto spu_putllc_tx = build_function_asm<int(*)(u32 raddr, u64 rtime, const
c.mov(x86::eax, 1);
c.ret();
// Touch memory after transaction failure
c.bind(fall);
c.lock().add(x86::qword_ptr(x86::r11), 0);
c.lock().add(x86::qword_ptr(x86::r10), 0);
c.sar(x86::eax, 24);
c.ret();
c.bind(fail);
build_transaction_abort(c, 0xff);
c.or_(x86::eax, -1);
c.ret();
c.int3();
});
const auto spu_getll_tx = build_function_asm<u64(*)(u32 raddr, void* rdata)>([](asmjit::X86Assembler& c, auto& args)
@ -312,10 +307,6 @@ const auto spu_getll_tx = build_function_asm<u64(*)(u32 raddr, void* rdata)>([](
c.shr(args[0], 4);
c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0]));
// Touch memory
c.mov(x86::rax, x86::qword_ptr(x86::r11));
c.mov(x86::rax, x86::qword_ptr(x86::r10));
// Begin transaction
build_transaction_enter(c, fall);
c.mov(x86::rax, x86::qword_ptr(x86::r10));
@ -331,7 +322,10 @@ const auto spu_getll_tx = build_function_asm<u64(*)(u32 raddr, void* rdata)>([](
c.vzeroupper();
c.ret();
// Touch memory after transaction failure
c.bind(fall);
c.mov(x86::rax, x86::qword_ptr(x86::r11));
c.mov(x86::rax, x86::qword_ptr(x86::r10));
c.mov(x86::eax, 1);
c.ret();
});
@ -351,10 +345,6 @@ const auto spu_putlluc_tx = build_function_asm<bool(*)(u32 raddr, const void* rd
c.shr(args[0], 4);
c.lea(x86::r10, x86::qword_ptr(x86::r10, args[0]));
// Touch memory (heavyweight)
c.lock().add(x86::qword_ptr(x86::r11), 0);
c.lock().add(x86::qword_ptr(x86::r10), 0);
// Prepare data
c.vmovups(x86::ymm0, x86::yword_ptr(args[1], 0));
c.vmovups(x86::ymm1, x86::yword_ptr(args[1], 32));
@ -377,7 +367,10 @@ const auto spu_putlluc_tx = build_function_asm<bool(*)(u32 raddr, const void* rd
c.mov(x86::eax, 1);
c.ret();
// Touch memory after transaction failure
c.bind(fall);
c.lock().add(x86::qword_ptr(x86::r11), 0);
c.lock().add(x86::qword_ptr(x86::r10), 0);
c.xor_(x86::eax, x86::eax);
c.ret();
});