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PPU: Detect lwmutex reservation pattern and optimize it

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Eladash 2022-08-18 16:10:24 +03:00 • committed by Ivan
parent 82b1a2bd7a
commit 86702186f2
1 changed files with 9 additions and 1 deletions
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10
rpcs3/Emu/Cell/PPUThread.cpp
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@ -2640,7 +2640,15 @@ static bool ppu_store_reservation(ppu_thread& ppu, u32 addr, u64 reg_value)
return false;
}())
{
res.notify_all(-128);
// Test a common pattern in lwmutex
constexpr u64 mutex_free = u64{static_cast<u32>(0 - 1)} << 32;
const bool may_be_lwmutex_related = sizeof(T) == 8 ?
(new_data == mutex_free && old_data == u64{ppu.id} << 32) : (old_data == mutex_free && new_data == u64{ppu.id} << 32);
if (!may_be_lwmutex_related)
{
res.notify_all(-128);
}
if (addr == ppu.last_faddr)
{