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SPU: Skip PUTLLUC writes of the same data

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This commit is contained in:
Elad 2025-06-08 17:40:51 +03:00
parent 866daf2059
commit e28a0bc2ba
2 changed files with 17 additions and 0 deletions
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16
rpcs3/Emu/Cell/SPUThread.cpp
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@ -4047,6 +4047,22 @@ void do_cell_atomic_128_store(u32 addr, const void* to_write)
auto& sdata = *vm::get_super_ptr<spu_rdata_t>(addr);
auto& res = *utils::bless<atomic_t<u128>>(vm::g_reservations + (addr & 0xff80) / 2);
if (std::memcmp(static_cast<const u8*>(to_write), &sdata, 16) == 0 && std::memcmp(static_cast<const u8*>(to_write) + 64, &sdata[64], 16) == 0)
{
const auto& write_data = *static_cast<const spu_rdata_t*>(to_write);
const u64 at_read_time = vm::reservation_acquire(addr);
if (!(at_read_time & 127))
{
if (cmp_rdata(sdata, write_data) && at_read_time == vm::reservation_acquire(addr) && cmp_rdata(sdata, write_data))
{
// Write of the same data (verified atomically)
vm::try_reservation_update(addr);
return;
}
}
}
for (u64 j = 0;; j++)
{
auto [_oldd, _ok] = res.fetch_op([&](u128& r)

1
rpcs3/Emu/Memory/vm_reservation.h
View file

@ -35,6 +35,7 @@ namespace vm
// Update reservation status
void reservation_update(u32 addr);
std::pair<bool, u64> try_reservation_update(u32 addr);
struct reservation_waiter_t
{