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JitCodeBuffer: Allocate within 32-bit range

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Stenzek
2023-11-24 19:53:46 +10:00
parent ca1dd27d4a
commit 5cf41a41f3
3 changed files with 95 additions and 19 deletions
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28
src/common/align.h
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@ -56,10 +56,34 @@ constexpr T PreviousPow2(T value)
value |= (value >> 1);
value |= (value >> 2);
value |= (value >> 4);
value |= (value >> 8);
value |= (value >> 16);
if constexpr (sizeof(T) >= 16)
value |= (value >> 8);
if constexpr (sizeof(T) >= 32)
value |= (value >> 16);
if constexpr (sizeof(T) >= 64)
value |= (value >> 32);
return value - (value >> 1);
}
template<typename T>
constexpr T NextPow2(T value)
{
// https://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
if (value == static_cast<T>(0))
return 0;
value--;
value |= (value >> 1);
value |= (value >> 2);
value |= (value >> 4);
if constexpr (sizeof(T) >= 16)
value |= (value >> 8);
if constexpr (sizeof(T) >= 32)
value |= (value >> 16);
if constexpr (sizeof(T) >= 64)
value |= (value >> 32);
value++;
return value;
}
ALWAYS_INLINE static void* AlignedMalloc(size_t size, size_t alignment)
{