mirror of
https://github.com/RPCSX/rpcsx.git
synced 2026-01-26 10:24:32 +01:00
525453794f
- Implement vm::reservation_trylock, optimized locking on reservation stores with no waiting. Always fail if reservation lock bitsa are set. - Make SPU accurate GET transfers on non-TSX not modify reservation lock bits. - Add some optimization regarding to unmodified data reservations writes.
54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
#pragma once
|
|
|
|
#include "vm.h"
|
|
#include "Utilities/cond.h"
|
|
#include "util/atomic.hpp"
|
|
|
|
namespace vm
|
|
{
|
|
// Get reservation status for further atomic update: last update timestamp
|
|
inline atomic_t<u64>& reservation_acquire(u32 addr, u32 size)
|
|
{
|
|
// Access reservation info: stamp and the lock bit
|
|
return *reinterpret_cast<atomic_t<u64>*>(g_reservations + (addr & 0xff80) / 2);
|
|
}
|
|
|
|
// Update reservation status
|
|
inline void reservation_update(u32 addr, u32 size, bool lsb = false)
|
|
{
|
|
// Update reservation info with new timestamp
|
|
reservation_acquire(addr, size) += 128;
|
|
}
|
|
|
|
// Get reservation sync variable
|
|
inline atomic_t<u64>& reservation_notifier(u32 addr, u32 size)
|
|
{
|
|
return *reinterpret_cast<atomic_t<u64>*>(g_reservations + (addr & 0xff80) / 2);
|
|
}
|
|
|
|
void reservation_lock_internal(atomic_t<u64>&);
|
|
|
|
inline atomic_t<u64>& reservation_lock(u32 addr, u32 size)
|
|
{
|
|
auto& res = vm::reservation_acquire(addr, size);
|
|
|
|
if (res.bts(0)) [[unlikely]]
|
|
{
|
|
reservation_lock_internal(res);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
inline bool reservation_trylock(atomic_t<u64>& res, u64 rtime)
|
|
{
|
|
if (res.compare_and_swap_test(rtime, rtime | 1)) [[likely]]
|
|
{
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
} // namespace vm
|