1 /*
   2  * Copyright 2003-2004 Sun Microsystems, Inc.  All Rights Reserved.
   3  * Copyright 2007, 2008, 2010 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  */
  25 
  26   static void setup_fpu() {}
  27 
  28   static bool is_allocatable(size_t bytes);
  29 
  30   // Used to register dynamic code cache area with the OS
  31   // Note: Currently only used in 64 bit Windows implementations
  32   static bool register_code_area(char *low, char *high) { return true; }
  33 
  34   // Atomically copy 64 bits of data
  35   static void atomic_copy64(volatile void *src, volatile void *dst) {
  36 #if defined(PPC) && !defined(_LP64)
  37     double tmp;
  38     asm volatile ("lfd  %0, 0(%1)\n"
  39                   "stfd %0, 0(%2)\n"
  40                   : "=f"(tmp)
  41                   : "b"(src), "b"(dst));
  42 #elif defined(S390) && !defined(_LP64)
  43     double tmp;
  44     asm volatile ("ld  %0, %1\n"
  45                   "std %0, %2\n"
  46                   : "=r"(tmp)
  47                   : "m"(src), "m"(dst));
  48 #else
  49     *(jlong *) dst = *(jlong *) src;
  50 #endif
  51   }