Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

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  */

 // If calls to prefetch methods are in a loop, the loop should be cloned

 // such that if Prefetch{Scan,Copy}Interval and/or PrefetchFieldInterval

 // say not to do prefetching, these methods aren't called.  At the very

 // least, they take up a memory issue slot.  They should be implemented

 // as inline assembly code: doing an actual call isn't worth the cost.

 class Prefetch : AllStatic {

  public:

   enum style {

     do_none,  // Do no prefetching

     do_read,  // Do read prefetching

     do_write  // Do write prefetching

   };

   // Prefetch anticipating read; must not fault, semantically a no-op

   static void read(void* loc, intx interval);

   // Prefetch anticipating write; must not fault, semantically a no-op

   static void write(void* loc, intx interval);

 };