0N/A/*
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0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
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0N/A
1879N/A#ifndef SHARE_VM_RUNTIME_PREFETCH_HPP
1879N/A#define SHARE_VM_RUNTIME_PREFETCH_HPP
1879N/A
1879N/A#include "memory/allocation.hpp"
1879N/A
0N/A// If calls to prefetch methods are in a loop, the loop should be cloned
0N/A// such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval
0N/A// say not to do prefetching, these methods aren't called. At the very
0N/A// least, they take up a memory issue slot. They should be implemented
0N/A// as inline assembly code: doing an actual call isn't worth the cost.
0N/A
0N/Aclass Prefetch : AllStatic {
0N/A public:
0N/A enum style {
0N/A do_none, // Do no prefetching
0N/A do_read, // Do read prefetching
0N/A do_write // Do write prefetching
0N/A };
0N/A
0N/A // Prefetch anticipating read; must not fault, semantically a no-op
0N/A static void read(void* loc, intx interval);
0N/A
0N/A // Prefetch anticipating write; must not fault, semantically a no-op
0N/A static void write(void* loc, intx interval);
0N/A};
1879N/A
1879N/A#endif // SHARE_VM_RUNTIME_PREFETCH_HPP