0N/A/*
1879N/A * Copyright (c) 1999, 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_LINUX_X86_VM_BYTES_LINUX_X86_INLINE_HPP
1879N/A#define OS_CPU_LINUX_X86_VM_BYTES_LINUX_X86_INLINE_HPP
1879N/A
0N/A#include <byteswap.h>
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 return bswap_16(x);
0N/A#else
0N/A u2 ret;
0N/A __asm__ __volatile__ (
0N/A "movw %0, %%ax;"
0N/A "xchg %%al, %%ah;"
0N/A "movw %%ax, %0"
0N/A :"=r" (ret) // output : register 0 => ret
0N/A :"0" (x) // input : x => register 0
0N/A :"ax", "0" // clobbered registers
0N/A );
0N/A return ret;
0N/A#endif // AMD64
0N/A}
0N/A
0N/Ainline u4 Bytes::swap_u4(u4 x) {
0N/A#ifdef AMD64
0N/A return bswap_32(x);
0N/A#else
0N/A u4 ret;
0N/A __asm__ __volatile__ (
0N/A "bswap %0"
0N/A :"=r" (ret) // output : register 0 => ret
0N/A :"0" (x) // input : x => register 0
0N/A :"0" // clobbered register
0N/A );
0N/A return ret;
0N/A#endif // AMD64
0N/A}
0N/A
0N/A#ifdef AMD64
0N/Ainline u8 Bytes::swap_u8(u8 x) {
50N/A#ifdef SPARC_WORKS
50N/A // workaround for SunStudio12 CR6615391
50N/A __asm__ __volatile__ (
50N/A "bswapq %0"
50N/A :"=r" (x) // output : register 0 => x
50N/A :"0" (x) // input : x => register 0
50N/A :"0" // clobbered register
50N/A );
50N/A return x;
50N/A#else
0N/A return bswap_64(x);
50N/A#endif
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 return (((u8)swap_u4(x))<<32) | swap_u4(y);
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
1879N/A
1879N/A#endif // OS_CPU_LINUX_X86_VM_BYTES_LINUX_X86_INLINE_HPP