0N/A/*
1879N/A * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1472N/A * or visit www.oracle.com if you need additional information or have any
1472N/A * questions.
0N/A *
0N/A */
0N/A
1879N/A#ifndef OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP
1879N/A#define OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP
1879N/A
0N/A#pragma warning(disable: 4035) // Disable warning 4035: no return value
0N/A
0N/A// Efficient swapping of data bytes from Java byte
0N/A// ordering to native byte ordering and vice versa.
0N/Ainline u2 Bytes::swap_u2(u2 x) {
0N/A#ifdef AMD64
0N/A address p = (address) &x;
0N/A return ( (u2(p[0]) << 8 ) | ( u2(p[1])) );
0N/A#else
0N/A __asm {
0N/A mov ax, x
0N/A xchg al, ah
0N/A }
0N/A // no return statement needed, result is already in ax
0N/A // compiler warning C4035 disabled via warning pragma
0N/A#endif // AMD64
0N/A}
0N/A
0N/Ainline u4 Bytes::swap_u4(u4 x) {
0N/A#ifdef AMD64
0N/A address p = (address) &x;
0N/A return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ;
0N/A#else
0N/A __asm {
0N/A mov eax, x
0N/A bswap eax
0N/A }
0N/A // no return statement needed, result is already in eax
0N/A // compiler warning C4035 disabled via warning pragma
0N/A#endif // AMD64
0N/A}
0N/A
0N/A#ifdef AMD64
0N/Ainline u8 Bytes::swap_u8(u8 x) {
0N/A address p = (address) &x;
0N/A return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) |
0N/A (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8) | u8(p[7])) ;
0N/A}
0N/A
0N/A#else
0N/A// Helper function for swap_u8
0N/Ainline u8 Bytes::swap_u8_base(u4 x, u4 y) {
0N/A __asm {
0N/A mov eax, y
0N/A mov edx, x
0N/A bswap eax
0N/A bswap edx
0N/A }
0N/A // no return statement needed, result is already in edx:eax
0N/A // compiler warning C4035 disabled via warning pragma
0N/A}
0N/A
0N/Ainline u8 Bytes::swap_u8(u8 x) {
0N/A return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));
0N/A}
0N/A#endif // AMD64
0N/A
0N/A#pragma warning(default: 4035) // Enable warning 4035: no return value
1879N/A
1879N/A#endif // OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP