0N/A/*
1879N/A * Copyright (c) 1997, 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 CPU_X86_VM_BYTES_X86_HPP
1879N/A#define CPU_X86_VM_BYTES_X86_HPP
1879N/A
1879N/A#include "memory/allocation.hpp"
1879N/A
0N/Aclass Bytes: AllStatic {
0N/A private:
0N/A#ifndef AMD64
0N/A // Helper function for swap_u8
0N/A static inline u8 swap_u8_base(u4 x, u4 y); // compiler-dependent implementation
0N/A#endif // AMD64
0N/A
0N/A public:
0N/A // Returns true if the byte ordering used by Java is different from the native byte ordering
0N/A // of the underlying machine. For example, this is true for Intel x86, but false for Solaris
0N/A // on Sparc.
0N/A static inline bool is_Java_byte_ordering_different(){ return true; }
0N/A
0N/A
0N/A // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering
0N/A // (no special code is needed since x86 CPUs can access unaligned data)
0N/A static inline u2 get_native_u2(address p) { return *(u2*)p; }
0N/A static inline u4 get_native_u4(address p) { return *(u4*)p; }
0N/A static inline u8 get_native_u8(address p) { return *(u8*)p; }
0N/A
0N/A static inline void put_native_u2(address p, u2 x) { *(u2*)p = x; }
0N/A static inline void put_native_u4(address p, u4 x) { *(u4*)p = x; }
0N/A static inline void put_native_u8(address p, u8 x) { *(u8*)p = x; }
0N/A
0N/A
0N/A // Efficient reading and writing of unaligned unsigned data in Java
0N/A // byte ordering (i.e. big-endian ordering). Byte-order reversal is
0N/A // needed since x86 CPUs use little-endian format.
0N/A static inline u2 get_Java_u2(address p) { return swap_u2(get_native_u2(p)); }
0N/A static inline u4 get_Java_u4(address p) { return swap_u4(get_native_u4(p)); }
0N/A static inline u8 get_Java_u8(address p) { return swap_u8(get_native_u8(p)); }
0N/A
0N/A static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, swap_u2(x)); }
0N/A static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, swap_u4(x)); }
0N/A static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, swap_u8(x)); }
0N/A
0N/A
0N/A // Efficient swapping of byte ordering
0N/A static inline u2 swap_u2(u2 x); // compiler-dependent implementation
0N/A static inline u4 swap_u4(u4 x); // compiler-dependent implementation
0N/A static inline u8 swap_u8(u8 x);
0N/A};
0N/A
0N/A
0N/A// The following header contains the implementations of swap_u2, swap_u4, and swap_u8[_base]
1879N/A#ifdef TARGET_OS_ARCH_linux_x86
1879N/A# include "bytes_linux_x86.inline.hpp"
1879N/A#endif
1879N/A#ifdef TARGET_OS_ARCH_solaris_x86
1879N/A# include "bytes_solaris_x86.inline.hpp"
1879N/A#endif
1879N/A#ifdef TARGET_OS_ARCH_windows_x86
1879N/A# include "bytes_windows_x86.inline.hpp"
1879N/A#endif
2796N/A#ifdef TARGET_OS_ARCH_bsd_x86
2796N/A# include "bytes_bsd_x86.inline.hpp"
2796N/A#endif
1879N/A
1879N/A
1879N/A#endif // CPU_X86_VM_BYTES_X86_HPP