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PojavLauncherTeam
GitHub Repository: PojavLauncherTeam/mobile
 Path: blob/master/src/hotspot/cpu/aarch64/bytes_aarch64.hpp
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/*

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 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.

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 * Copyright (c) 2014, Red Hat Inc. All rights reserved.

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

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 *

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

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

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 * published by the Free Software Foundation.

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 *

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

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

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

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

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 * accompanied this code).

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 *

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

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

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

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 *

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

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

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 * questions.

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 *

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 */

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#ifndef CPU_AARCH64_BYTES_AARCH64_HPP

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#define CPU_AARCH64_BYTES_AARCH64_HPP

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#include "memory/allocation.hpp"

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class Bytes: AllStatic {

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 public:

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  // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering

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  // (no special code is needed since x86 CPUs can access unaligned data)

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  static inline u2   get_native_u2(address p)         { return *(u2*)p; }

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  static inline u4   get_native_u4(address p)         { return *(u4*)p; }

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  static inline u8   get_native_u8(address p)         { return *(u8*)p; }

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  static inline void put_native_u2(address p, u2 x)   { *(u2*)p = x; }

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  static inline void put_native_u4(address p, u4 x)   { *(u4*)p = x; }

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  static inline void put_native_u8(address p, u8 x)   { *(u8*)p = x; }

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  // Efficient reading and writing of unaligned unsigned data in Java

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  // byte ordering (i.e. big-endian ordering). Byte-order reversal is

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  // needed since x86 CPUs use little-endian format.

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  static inline u2   get_Java_u2(address p)           { return swap_u2(get_native_u2(p)); }

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  static inline u4   get_Java_u4(address p)           { return swap_u4(get_native_u4(p)); }

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  static inline u8   get_Java_u8(address p)           { return swap_u8(get_native_u8(p)); }

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  static inline void put_Java_u2(address p, u2 x)     { put_native_u2(p, swap_u2(x)); }

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  static inline void put_Java_u4(address p, u4 x)     { put_native_u4(p, swap_u4(x)); }

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  static inline void put_Java_u8(address p, u8 x)     { put_native_u8(p, swap_u8(x)); }

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  // Efficient swapping of byte ordering

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  static inline u2   swap_u2(u2 x);                   // compiler-dependent implementation

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  static inline u4   swap_u4(u4 x);                   // compiler-dependent implementation

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  static inline u8   swap_u8(u8 x);

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};

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// The following header contains the implementations of swap_u2, swap_u4, and swap_u8[_base]

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#include OS_CPU_HEADER(bytes)

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#endif // CPU_AARCH64_BYTES_AARCH64_HPP

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