bitsandbytes-rocm/include/AAlloc.h

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2021-10-06 02:16:20 +00:00
#pragma once
#include "Portable.h"
namespace BinSearch {
namespace Details {
template <typename T>
bool isAligned(const T *p, size_t A)
{
return (reinterpret_cast<size_t>(p) % A) == 0;
}
template <class T, size_t A=64>
struct AlignedVec
{
AlignedVec()
: m_storage(0)
, m_data(0)
, m_sz(0)
{
}
static size_t nBytes(size_t sz)
{
return sz * sizeof(T) + A;
}
static size_t shiftAmt(char *p)
{
return A>1? (A - (reinterpret_cast<size_t>(p) % A)) % A: 0;
}
void setPtr(char *p, size_t sz)
{
m_sz = sz;
m_data = reinterpret_cast<T *>(p + shiftAmt(p));
}
//void setPtr(T *p, size_t sz)
//{
// m_sz = sz;
// if (A>1)
// myassert(((reinterpret_cast<size_t>(p) % A) == 0), "bad alignment");
// m_data = p;
//}
// internal allocation
void resize(size_t sz)
{
m_storage = new char[nBytes(sz)];
setPtr(m_storage, sz);
}
// external allocation
void set(char *storage, size_t sz)
{
setPtr(storage, sz);
}
~AlignedVec()
{
if (m_storage)
delete [] m_storage;
}
size_t size() const { return m_sz; }
T& operator[](size_t i) { return m_data[i]; }
const T& operator[](size_t i) const { return m_data[i]; }
T* begin() { return m_data; }
T* end() { return m_data+m_sz; }
const T* begin() const { return m_data; }
const T* end() const { return m_data+m_sz; }
T& front() { return m_data[0]; }
T& back() { return m_data[m_sz-1]; }
const T& front() const { return m_data[0]; }
const T& back() const { return m_data[m_sz - 1]; }
private:
char *m_storage;
T *m_data;
size_t m_sz;
};
} // namespace Details
} // namespace BinSearch