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atomic.hpp: add some features and optimizations

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Add atomic_t<>::observe() (relaxed load)
Add atomic_fence_XXX() (barrier functions)
Get rid of MFENCE instruction, replace with no-op LOCK OR on stack.
Remove <atomic> dependence from stdafx.h and relevant headers.
This commit is contained in:
Nekotekina 2020-12-06 12:10:00 +03:00
parent 77aa9e58f2
commit b16cc618b5
14 changed files with 171 additions and 60 deletions
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10
rpcs3/Emu/Cell/SPUThread.cpp
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@ -2277,7 +2277,7 @@ void spu_thread::do_dma_transfer(spu_thread* _this, const spu_mfc_cmd& args, u8*
}
}
//std::atomic_thread_fence(std::memory_order_seq_cst);
//atomic_fence_seq_cst();
return;
}
else
@ -2904,7 +2904,7 @@ void spu_thread::do_mfc(bool wait)
if (&args - mfc_queue <= removed)
{
// Remove barrier-class command if it's the first in the queue
std::atomic_thread_fence(std::memory_order_seq_cst);
atomic_fence_seq_cst();
removed++;
return true;
}
@ -3130,7 +3130,7 @@ bool spu_thread::process_mfc_cmd()
// Exit loop
if (ok && (ntime & 127) == 0)
{
_mm_mfence();
atomic_fence_seq_cst();
i = -1;
return;
}
@ -3352,7 +3352,7 @@ bool spu_thread::process_mfc_cmd()
{
if (mfc_size == 0)
{
std::atomic_thread_fence(std::memory_order_seq_cst);
atomic_fence_seq_cst();
}
else
{
@ -4420,7 +4420,7 @@ bool spu_thread::stop_and_signal(u32 code)
fmt::throw_exception("STOP code 0x100: Out_MBox is not empty" HERE);
}
std::atomic_thread_fence(std::memory_order_seq_cst);
atomic_fence_seq_cst();
return true;
}