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/*
* Prefetching Operations
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_PREFETCH_H__
#define BOTAN_PREFETCH_H__
#include <botan/cpuid.h>
namespace Botan {
template<typename T>
inline void prefetch_readonly(const T* addr, u32bit length)
{
#if defined(__GNUG__)
const u32bit Ts_per_cache_line = CPUID::cache_line_size() / sizeof(T);
for(u32bit i = 0; i <= length; i += Ts_per_cache_line)
__builtin_prefetch(addr + i, 0);
#endif
}
template<typename T>
inline void prefetch_readwrite(const T* addr, u32bit length)
{
#if defined(__GNUG__)
const u32bit Ts_per_cache_line = CPUID::cache_line_size() / sizeof(T);
for(u32bit i = 0; i <= length; i += Ts_per_cache_line)
__builtin_prefetch(addr + i, 1);
#endif
}
}
#endif
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