Tue, 24 Dec 2013 11:48:39 -0800
8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov
never@1445 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
never@1445 | 3 | * Copyright 2007, 2008, 2009 Red Hat, Inc. |
never@1445 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
never@1445 | 5 | * |
never@1445 | 6 | * This code is free software; you can redistribute it and/or modify it |
never@1445 | 7 | * under the terms of the GNU General Public License version 2 only, as |
never@1445 | 8 | * published by the Free Software Foundation. |
never@1445 | 9 | * |
never@1445 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
never@1445 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
never@1445 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
never@1445 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
never@1445 | 14 | * accompanied this code). |
never@1445 | 15 | * |
never@1445 | 16 | * You should have received a copy of the GNU General Public License version |
never@1445 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
never@1445 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
never@1445 | 19 | * |
trims@1907 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 21 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 22 | * questions. |
never@1445 | 23 | * |
never@1445 | 24 | */ |
never@1445 | 25 | |
stefank@2314 | 26 | #ifndef CPU_ZERO_VM_BYTES_ZERO_HPP |
stefank@2314 | 27 | #define CPU_ZERO_VM_BYTES_ZERO_HPP |
stefank@2314 | 28 | |
stefank@2314 | 29 | #include "memory/allocation.hpp" |
stefank@2314 | 30 | |
never@1445 | 31 | typedef union unaligned { |
never@1445 | 32 | u4 u; |
never@1445 | 33 | u2 us; |
never@1445 | 34 | u8 ul; |
never@1445 | 35 | } __attribute__((packed)) unaligned; |
never@1445 | 36 | |
never@1445 | 37 | class Bytes: AllStatic { |
never@1445 | 38 | public: |
never@1445 | 39 | // Returns true if the byte ordering used by Java is different |
never@1445 | 40 | // from the native byte ordering of the underlying machine. |
never@1445 | 41 | static inline bool is_Java_byte_ordering_different() { |
never@1445 | 42 | #ifdef VM_LITTLE_ENDIAN |
never@1445 | 43 | return true; |
never@1445 | 44 | #else |
never@1445 | 45 | return false; |
never@1445 | 46 | #endif |
never@1445 | 47 | } |
never@1445 | 48 | |
never@1445 | 49 | // Efficient reading and writing of unaligned unsigned data in |
never@1445 | 50 | // platform-specific byte ordering. |
never@1445 | 51 | static inline u2 get_native_u2(address p){ |
never@1445 | 52 | unaligned *up = (unaligned *) p; |
never@1445 | 53 | return up->us; |
never@1445 | 54 | } |
never@1445 | 55 | |
never@1445 | 56 | static inline u4 get_native_u4(address p) { |
never@1445 | 57 | unaligned *up = (unaligned *) p; |
never@1445 | 58 | return up->u; |
never@1445 | 59 | } |
never@1445 | 60 | |
never@1445 | 61 | static inline u8 get_native_u8(address p) { |
never@1445 | 62 | unaligned *up = (unaligned *) p; |
never@1445 | 63 | return up->ul; |
never@1445 | 64 | } |
never@1445 | 65 | |
never@1445 | 66 | static inline void put_native_u2(address p, u2 x) { |
never@1445 | 67 | unaligned *up = (unaligned *) p; |
never@1445 | 68 | up->us = x; |
never@1445 | 69 | } |
never@1445 | 70 | |
never@1445 | 71 | static inline void put_native_u4(address p, u4 x) { |
never@1445 | 72 | unaligned *up = (unaligned *) p; |
never@1445 | 73 | up->u = x; |
never@1445 | 74 | } |
never@1445 | 75 | |
never@1445 | 76 | static inline void put_native_u8(address p, u8 x) { |
never@1445 | 77 | unaligned *up = (unaligned *) p; |
never@1445 | 78 | up->ul = x; |
never@1445 | 79 | } |
never@1445 | 80 | |
never@1445 | 81 | // Efficient reading and writing of unaligned unsigned data in Java |
never@1445 | 82 | // byte ordering (i.e. big-endian ordering). |
never@1445 | 83 | #ifdef VM_LITTLE_ENDIAN |
never@1445 | 84 | // Byte-order reversal is needed |
never@1445 | 85 | static inline u2 get_Java_u2(address p) { |
never@1445 | 86 | return (u2(p[0]) << 8) | |
never@1445 | 87 | (u2(p[1]) ); |
never@1445 | 88 | } |
never@1445 | 89 | static inline u4 get_Java_u4(address p) { |
never@1445 | 90 | return (u4(p[0]) << 24) | |
never@1445 | 91 | (u4(p[1]) << 16) | |
never@1445 | 92 | (u4(p[2]) << 8) | |
never@1445 | 93 | (u4(p[3]) ); |
never@1445 | 94 | } |
never@1445 | 95 | static inline u8 get_Java_u8(address p) { |
never@1445 | 96 | u4 hi, lo; |
never@1445 | 97 | hi = (u4(p[0]) << 24) | |
never@1445 | 98 | (u4(p[1]) << 16) | |
never@1445 | 99 | (u4(p[2]) << 8) | |
never@1445 | 100 | (u4(p[3]) ); |
never@1445 | 101 | lo = (u4(p[4]) << 24) | |
never@1445 | 102 | (u4(p[5]) << 16) | |
never@1445 | 103 | (u4(p[6]) << 8) | |
never@1445 | 104 | (u4(p[7]) ); |
never@1445 | 105 | return u8(lo) | (u8(hi) << 32); |
never@1445 | 106 | } |
never@1445 | 107 | |
never@1445 | 108 | static inline void put_Java_u2(address p, u2 x) { |
never@1445 | 109 | p[0] = x >> 8; |
never@1445 | 110 | p[1] = x; |
never@1445 | 111 | } |
never@1445 | 112 | static inline void put_Java_u4(address p, u4 x) { |
never@1445 | 113 | p[0] = x >> 24; |
never@1445 | 114 | p[1] = x >> 16; |
never@1445 | 115 | p[2] = x >> 8; |
never@1445 | 116 | p[3] = x; |
never@1445 | 117 | } |
never@1445 | 118 | static inline void put_Java_u8(address p, u8 x) { |
never@1445 | 119 | u4 hi, lo; |
never@1445 | 120 | lo = x; |
never@1445 | 121 | hi = x >> 32; |
never@1445 | 122 | p[0] = hi >> 24; |
never@1445 | 123 | p[1] = hi >> 16; |
never@1445 | 124 | p[2] = hi >> 8; |
never@1445 | 125 | p[3] = hi; |
never@1445 | 126 | p[4] = lo >> 24; |
never@1445 | 127 | p[5] = lo >> 16; |
never@1445 | 128 | p[6] = lo >> 8; |
never@1445 | 129 | p[7] = lo; |
never@1445 | 130 | } |
never@1445 | 131 | |
never@1445 | 132 | // Efficient swapping of byte ordering |
never@1445 | 133 | static inline u2 swap_u2(u2 x); |
never@1445 | 134 | static inline u4 swap_u4(u4 x); |
never@1445 | 135 | static inline u8 swap_u8(u8 x); |
never@1445 | 136 | #else |
never@1445 | 137 | // No byte-order reversal is needed |
never@1445 | 138 | static inline u2 get_Java_u2(address p) { |
never@1445 | 139 | return get_native_u2(p); |
never@1445 | 140 | } |
never@1445 | 141 | static inline u4 get_Java_u4(address p) { |
never@1445 | 142 | return get_native_u4(p); |
never@1445 | 143 | } |
never@1445 | 144 | static inline u8 get_Java_u8(address p) { |
never@1445 | 145 | return get_native_u8(p); |
never@1445 | 146 | } |
never@1445 | 147 | |
never@1445 | 148 | static inline void put_Java_u2(address p, u2 x) { |
never@1445 | 149 | put_native_u2(p, x); |
never@1445 | 150 | } |
never@1445 | 151 | static inline void put_Java_u4(address p, u4 x) { |
never@1445 | 152 | put_native_u4(p, x); |
never@1445 | 153 | } |
never@1445 | 154 | static inline void put_Java_u8(address p, u8 x) { |
never@1445 | 155 | put_native_u8(p, x); |
never@1445 | 156 | } |
never@1445 | 157 | |
never@1445 | 158 | // No byte-order reversal is needed |
never@1445 | 159 | static inline u2 swap_u2(u2 x) { return x; } |
never@1445 | 160 | static inline u4 swap_u4(u4 x) { return x; } |
never@1445 | 161 | static inline u8 swap_u8(u8 x) { return x; } |
never@1445 | 162 | #endif // VM_LITTLE_ENDIAN |
never@1445 | 163 | }; |
never@1445 | 164 | |
never@1445 | 165 | #ifdef VM_LITTLE_ENDIAN |
never@1445 | 166 | // The following header contains the implementations of swap_u2, |
never@1445 | 167 | // swap_u4, and swap_u8 |
stefank@2314 | 168 | #ifdef TARGET_OS_ARCH_linux_zero |
stefank@2314 | 169 | # include "bytes_linux_zero.inline.hpp" |
stefank@2314 | 170 | #endif |
never@3156 | 171 | #ifdef TARGET_OS_ARCH_bsd_zero |
never@3156 | 172 | # include "bytes_bsd_zero.inline.hpp" |
never@3156 | 173 | #endif |
stefank@2314 | 174 | |
never@1445 | 175 | #endif // VM_LITTLE_ENDIAN |
stefank@2314 | 176 | |
stefank@2314 | 177 | #endif // CPU_ZERO_VM_BYTES_ZERO_HPP |