/* * 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, 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