jdk8-mips64-public/hotspot: src/os_cpu/windows_x86/vm/bytes_windows

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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

     1 /*

     2  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP

    26 #define OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP

    28 #pragma warning(disable: 4035) // Disable warning 4035: no return value

    30 // Efficient swapping of data bytes from Java byte

    31 // ordering to native byte ordering and vice versa.

    32 inline u2 Bytes::swap_u2(u2 x) {

    33 #ifdef AMD64

    34   address p = (address) &x;

    35   return  ( (u2(p[0]) << 8 ) | ( u2(p[1])) );

    36 #else

    37   __asm {

    38     mov ax, x

    39     xchg al, ah

    40   }

    41   // no return statement needed, result is already in ax

    42   // compiler warning C4035 disabled via warning pragma

    43 #endif // AMD64

    44 }

    46 inline u4 Bytes::swap_u4(u4 x) {

    47 #ifdef AMD64

    48   address p = (address) &x;

    49   return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ;

    50 #else

    51   __asm {

    52     mov eax, x

    53     bswap eax

    54   }

    55   // no return statement needed, result is already in eax

    56   // compiler warning C4035 disabled via warning pragma

    57 #endif // AMD64

    58 }

    60 #ifdef AMD64

    61 inline u8 Bytes::swap_u8(u8 x) {

    62   address p = (address) &x;

    63   return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) |

    64            (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8)  | u8(p[7])) ;

    65 }

    67 #else

    68 // Helper function for swap_u8

    69 inline u8 Bytes::swap_u8_base(u4 x, u4 y) {

    70   __asm {

    71     mov eax, y

    72     mov edx, x

    73     bswap eax

    74     bswap edx

    75   }

    76   // no return statement needed, result is already in edx:eax

    77   // compiler warning C4035 disabled via warning pragma

    78 }

    80 inline u8 Bytes::swap_u8(u8 x) {

    81   return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));

    82 }

    83 #endif // AMD64

    85 #pragma warning(default: 4035) // Enable warning 4035: no return value

    87 #endif // OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP

src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp@f90c822e73f8