jdk8-mips64-public/hotspot: src/os_cpu/linux_zero/vm/os_linux

6927165: Zero S/390 fixes
Summary: Fixes two failures on 31-bit S/390.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>

     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  */

    26   static void setup_fpu() {}

    28   static bool is_allocatable(size_t bytes);

    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; }

    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, 0(%1)\n"

    45                   "std %0, 0(%2)\n"

    46                   : "=r"(tmp)

    47                   : "a"(src), "a"(dst));

    48 #else

    49     *(jlong *) dst = *(jlong *) src;

    50 #endif

    51   }

src/os_cpu/linux_zero/vm/os_linux_zero.hpp@3b687c53c266