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SPU: Fix race in PUTLLC with unchanged data
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This commit is contained in:
Elad 2025-11-08 11:35:05 +02:00
parent b435deac9d
commit 8126a199f5
1 changed files with 2 additions and 1 deletions
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3
rpcs3/Emu/Cell/SPUThread.cpp
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@ -3844,7 +3844,8 @@ bool spu_thread::do_putllc(const spu_mfc_cmd& args)
}
// Writeback of unchanged data. Only check memory change
if (cmp_rdata(rdata, vm::_ref<spu_rdata_t>(addr)) && res.compare_and_swap_test(rtime, rtime + 128))
// For the comparison, load twice for atomicity
if (cmp_rdata(rdata, vm::_ref<spu_rdata_t>(addr)) && res == rtime && cmp_rdata(rdata, vm::_ref<spu_rdata_t>(addr)) && res.compare_and_swap_test(rtime, rtime + 128))
{
raddr = 0; // Disable notification
return true;