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/*
* Prefetching Operations
* (C) 2009 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_PREFETCH_H_
#define BOTAN_PREFETCH_H_
#include <botan/cpuid.h>
namespace Botan {
template<typename T>
inline void prefetch_readonly(const T* addr, size_t length)
{
#if defined(__GNUG__)
const size_t Ts_per_cache_line = CPUID::cache_line_size() / sizeof(T);
for(size_t 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, size_t length)
{
#if defined(__GNUG__)
const size_t Ts_per_cache_line = CPUID::cache_line_size() / sizeof(T);
for(size_t i = 0; i <= length; i += Ts_per_cache_line)
__builtin_prefetch(addr + i, 1);
#endif
}
}
#endif
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