// Copyright 2020 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include "common/atomic_ops.h"
#if _MSC_VER
#include <intrin.h>
#endif
namespace Common {
#if _MSC_VER
bool AtomicCompareAndSwap(u8 volatile* pointer, u8 value, u8 expected) {
u8 result = _InterlockedCompareExchange8((char*)pointer, value, expected);
return result == expected;
}
bool AtomicCompareAndSwap(u16 volatile* pointer, u16 value, u16 expected) {
u16 result = _InterlockedCompareExchange16((short*)pointer, value, expected);
return result == expected;
}
bool AtomicCompareAndSwap(u32 volatile* pointer, u32 value, u32 expected) {
u32 result = _InterlockedCompareExchange((long*)pointer, value, expected);
return result == expected;
}
bool AtomicCompareAndSwap(u64 volatile* pointer, u64 value, u64 expected) {
u64 result = _InterlockedCompareExchange64((__int64*)pointer, value, expected);
return result == expected;
}
bool AtomicCompareAndSwap(u64 volatile* pointer, u128 value, u128 expected) {
return _InterlockedCompareExchange128((__int64*)pointer, value[1], value[0], (__int64*)expected.data()) != 0;
}
#else
bool AtomicCompareAndSwap(u8 volatile* pointer, u8 value, u8 expected) {
return __sync_bool_compare_and_swap (pointer, value, expected);
}
bool AtomicCompareAndSwap(u16 volatile* pointer, u16 value, u16 expected) {
return __sync_bool_compare_and_swap (pointer, value, expected);
}
bool AtomicCompareAndSwap(u32 volatile* pointer, u32 value, u32 expected) {
return __sync_bool_compare_and_swap (pointer, value, expected);
}
bool AtomicCompareAndSwap(u64 volatile* pointer, u64 value, u64 expected) {
return __sync_bool_compare_and_swap (pointer, value, expected);
}
bool AtomicCompareAndSwap(u64 volatile* pointer, u128 value, u128 expected) {
unsigned __int128 value_a;
unsigned __int128 expected_a;
std::memcpy(&value_a, value.data(), sizeof(u128));
std::memcpy(&expected_a, expected.data(), sizeof(u128));
return __sync_bool_compare_and_swap ((unsigned __int128*)pointer, value_a, expected_a);
}
#endif
} // namespace Common
