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atomic.cpp: allow non-standard sizes in atomic wait (>16)

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Nekotekina 2021-03-23 20:52:56 +03:00
parent 820390b7ed
commit 393f9d329d
1 changed files with 11 additions and 4 deletions
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15
rpcs3/util/atomic.cpp
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@ -174,8 +174,8 @@ static NEVER_INLINE bool ptr_cmp(const void* data, u32 _size, u128 old128, u128
else if (size == 16 && (flag == op::eq || flag == (op::eq | op_flag::inverse))) else if (size == 16 && (flag == op::eq || flag == (op::eq | op_flag::inverse)))
{ {
u128 new_value = 0; u128 new_value = 0;
u128 old_value = std::bit_cast<u128>(old128); u128 old_value = old128;
u128 mask = std::bit_cast<u128>(mask128); u128 mask = mask128;
// Don't load memory on empty mask // Don't load memory on empty mask
if (mask) [[likely]] if (mask) [[likely]]
@ -186,9 +186,16 @@ static NEVER_INLINE bool ptr_cmp(const void* data, u32 _size, u128 old128, u128
// TODO // TODO
result = !((old_value ^ new_value) & mask); result = !((old_value ^ new_value) & mask);
} }
else if (size == 16) else if (size > 16 && !~mask128 && (flag == op::eq || flag == (op::eq | op_flag::inverse)))
{ {
fmt::throw_exception("ptr_cmp(): no alternative operations are supported for 16-byte atomic wait yet."); // Interpret old128 as a pointer to the old value
ensure(!(old128 >> (64 + 17)));
result = std::memcmp(data, reinterpret_cast<const void*>(static_cast<uptr>(old128)), size) == 0;
}
else
{
fmt::throw_exception("ptr_cmp(): no alternative operations are supported for non-standard atomic wait yet.");
} }
if (flag & op_flag::inverse) if (flag & op_flag::inverse)