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Minor additions, including function VmaPrevPow2.

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This commit is contained in:
Adam Sawicki 2018-09-07 17:43:40 +02:00
parent 8092715d2c
commit 0dbbaad040
1 changed files with 25 additions and 0 deletions
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25
src/vk_mem_alloc.h
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@ -2997,6 +2997,29 @@ static inline uint64_t VmaNextPow2(uint64_t v)
return v;
}
// Returns largest power of 2 less or equal to v.
static inline uint32_t VmaPrevPow2(uint32_t v)
{
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v = v ^ (v >> 1);
return v;
}
static inline uint64_t VmaPrevPow2(uint64_t v)
{
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v |= v >> 32;
v = v ^ (v >> 1);
return v;
}
static inline bool VmaStrIsEmpty(const char* pStr)
{
return pStr == VMA_NULL || *pStr == '\0';
@ -6586,6 +6609,7 @@ VmaBlockMetadata_Generic::~VmaBlockMetadata_Generic()
void VmaBlockMetadata_Generic::Init(VkDeviceSize size)
{
VmaBlockMetadata::Init(size);
m_FreeCount = 1;
m_SumFreeSize = size;
@ -6595,6 +6619,7 @@ void VmaBlockMetadata_Generic::Init(VkDeviceSize size)
suballoc.type = VMA_SUBALLOCATION_TYPE_FREE;
suballoc.hAllocation = VK_NULL_HANDLE;
VMA_ASSERT(size > VMA_MIN_FREE_SUBALLOCATION_SIZE_TO_REGISTER);
m_Suballocations.push_back(suballoc);
VmaSuballocationList::iterator suballocItem = m_Suballocations.end();
--suballocItem;