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VS2022 seems to introduce an optimization when moving vectors to check for equality of the element values. AlignmentAllocator needed to overload the equality operator to fix compilation of its usage in vector moving.
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AlignUpLog2 describes what the function does better than AlignBits.
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Now that clang-format makes [[nodiscard]] attributes format sensibly, we
can apply them to several functions within the common library to allow
the compiler to complain about any misuses of the functions.
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In file included from src/core/hle/kernel/memory/page_table.cpp:5:
src/./common/alignment.h:67:68: error: no member named 'align_val_t' in namespace 'std'
return static_cast<T*>(::operator new (n * sizeof(T), std::align_val_t{Align}));
~~~~~^
src/./common/alignment.h:71:51: error: no member named 'align_val_t' in namespace 'std'
::operator delete (p, n * sizeof(T), std::align_val_t{Align});
~~~~~^
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With C++20, much of the allocator interface has been simplified, so we
can make the same adjustments.
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In cases where the size is not a known constant when inlining, AlignUp<std::size_t> currently generates two 64-bit div instructions.
This generates one div and a cmov which is significantly cheaper.
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This was related to the source allocator being passed into the
constructor potentially having a different type than allocator being
constructed.
We simply need to provide a constructor to handle this case.
This resolves issues related to the allocator causing debug builds on
MSVC to fail.
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Allows containers and other data structures to consider optimizations
based off of them. We satisfy all of these requirements anyways.
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This commit ensures that all backing memory allocated for the Guest CPU
is aligned to 256 bytes. This due to how gpu memory works and the heavy
constraints it has in the alignment of physical memory.
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Instead of storing all block width, height and depths in their shifted
form:
block_width = 1U << block_shift;
Store them like they are provided by the emulated hardware (their
block_shift form). This way we can avoid doing the costly
Common::AlignUp operation to align texture sizes and drop CPU integer
divisions with bitwise logic (defined in Common::AlignBits).
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This will be used in a following change to svcArbitrateLock() and
svcArbitrateUnlock()
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Aligning on 4KB pages isn't a Switch-specific thing, so this can be
moved to common so it can be used with other things as well.
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Uses the C++17 inline variable variants
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