1 /*
 2  * Copyright (c) 2003, 2019, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21  * or visit www.oracle.com if you need additional information or have any
22  * questions.
23  *
24  */
25 
26 #ifndef OS_CPU_BSD_ZERO_OS_BSD_ZERO_HPP
27 #define OS_CPU_BSD_ZERO_OS_BSD_ZERO_HPP
28 
29   static void setup_fpu() {}
30 
31   static bool is_allocatable(size_t bytes);
32 
33   // Used to register dynamic code cache area with the OS
34   // Note: Currently only used in 64 bit Windows implementations
35   static bool register_code_area(char *low, char *high) { return true; }
36 
37   // Atomically copy 64 bits of data
38   static void atomic_copy64(const volatile void *src, volatile void *dst) {
39 #if defined(PPC32)
40     double tmp;
41     asm volatile ("lfd  %0, 0(%1)\n"
42                   "stfd %0, 0(%2)\n"
43                   : "=f"(tmp)
44                   : "b"(src), "b"(dst));
45 #elif defined(S390) && !defined(_LP64)
46     double tmp;
47     asm volatile ("ld  %0, 0(%1)\n"
48                   "std %0, 0(%2)\n"
49                   : "=r"(tmp)
50                   : "a"(src), "a"(dst));
51 #else
52     *(jlong *) dst = *(const jlong *) src;
53 #endif
54   }
55 
56 #endif // OS_CPU_BSD_ZERO_OS_BSD_ZERO_HPP