Mercurial > hg > graal-compiler
annotate src/cpu/zero/vm/bytes_zero.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 1010 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 1010 | 3 * Copyright 2007, 2008, 2009 Red Hat, Inc. |
| 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 5 * | |
| 6 * This code is free software; you can redistribute it and/or modify it | |
| 7 * under the terms of the GNU General Public License version 2 only, as | |
| 8 * published by the Free Software Foundation. | |
| 9 * | |
| 10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 13 * version 2 for more details (a copy is included in the LICENSE file that | |
| 14 * accompanied this code). | |
| 15 * | |
| 16 * You should have received a copy of the GNU General Public License version | |
| 17 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 19 * | |
|
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 * or visit www.oracle.com if you need additional information or have any |
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22 * questions. |
| 1010 | 23 * |
| 24 */ | |
| 25 | |
| 1972 | 26 #ifndef CPU_ZERO_VM_BYTES_ZERO_HPP |
| 27 #define CPU_ZERO_VM_BYTES_ZERO_HPP | |
| 28 | |
| 29 #include "memory/allocation.hpp" | |
| 30 | |
| 1010 | 31 typedef union unaligned { |
| 32 u4 u; | |
| 33 u2 us; | |
| 34 u8 ul; | |
| 35 } __attribute__((packed)) unaligned; | |
| 36 | |
| 37 class Bytes: AllStatic { | |
| 38 public: | |
| 39 // Returns true if the byte ordering used by Java is different | |
| 40 // from the native byte ordering of the underlying machine. | |
| 41 static inline bool is_Java_byte_ordering_different() { | |
| 42 #ifdef VM_LITTLE_ENDIAN | |
| 43 return true; | |
| 44 #else | |
| 45 return false; | |
| 46 #endif | |
| 47 } | |
| 48 | |
| 49 // Efficient reading and writing of unaligned unsigned data in | |
| 50 // platform-specific byte ordering. | |
| 51 static inline u2 get_native_u2(address p){ | |
| 52 unaligned *up = (unaligned *) p; | |
| 53 return up->us; | |
| 54 } | |
| 55 | |
| 56 static inline u4 get_native_u4(address p) { | |
| 57 unaligned *up = (unaligned *) p; | |
| 58 return up->u; | |
| 59 } | |
| 60 | |
| 61 static inline u8 get_native_u8(address p) { | |
| 62 unaligned *up = (unaligned *) p; | |
| 63 return up->ul; | |
| 64 } | |
| 65 | |
| 66 static inline void put_native_u2(address p, u2 x) { | |
| 67 unaligned *up = (unaligned *) p; | |
| 68 up->us = x; | |
| 69 } | |
| 70 | |
| 71 static inline void put_native_u4(address p, u4 x) { | |
| 72 unaligned *up = (unaligned *) p; | |
| 73 up->u = x; | |
| 74 } | |
| 75 | |
| 76 static inline void put_native_u8(address p, u8 x) { | |
| 77 unaligned *up = (unaligned *) p; | |
| 78 up->ul = x; | |
| 79 } | |
| 80 | |
| 81 // Efficient reading and writing of unaligned unsigned data in Java | |
| 82 // byte ordering (i.e. big-endian ordering). | |
| 83 #ifdef VM_LITTLE_ENDIAN | |
| 84 // Byte-order reversal is needed | |
| 85 static inline u2 get_Java_u2(address p) { | |
| 86 return (u2(p[0]) << 8) | | |
| 87 (u2(p[1]) ); | |
| 88 } | |
| 89 static inline u4 get_Java_u4(address p) { | |
| 90 return (u4(p[0]) << 24) | | |
| 91 (u4(p[1]) << 16) | | |
| 92 (u4(p[2]) << 8) | | |
| 93 (u4(p[3]) ); | |
| 94 } | |
| 95 static inline u8 get_Java_u8(address p) { | |
| 96 u4 hi, lo; | |
| 97 hi = (u4(p[0]) << 24) | | |
| 98 (u4(p[1]) << 16) | | |
| 99 (u4(p[2]) << 8) | | |
| 100 (u4(p[3]) ); | |
| 101 lo = (u4(p[4]) << 24) | | |
| 102 (u4(p[5]) << 16) | | |
| 103 (u4(p[6]) << 8) | | |
| 104 (u4(p[7]) ); | |
| 105 return u8(lo) | (u8(hi) << 32); | |
| 106 } | |
| 107 | |
| 108 static inline void put_Java_u2(address p, u2 x) { | |
| 109 p[0] = x >> 8; | |
| 110 p[1] = x; | |
| 111 } | |
| 112 static inline void put_Java_u4(address p, u4 x) { | |
| 113 p[0] = x >> 24; | |
| 114 p[1] = x >> 16; | |
| 115 p[2] = x >> 8; | |
| 116 p[3] = x; | |
| 117 } | |
| 118 static inline void put_Java_u8(address p, u8 x) { | |
| 119 u4 hi, lo; | |
| 120 lo = x; | |
| 121 hi = x >> 32; | |
| 122 p[0] = hi >> 24; | |
| 123 p[1] = hi >> 16; | |
| 124 p[2] = hi >> 8; | |
| 125 p[3] = hi; | |
| 126 p[4] = lo >> 24; | |
| 127 p[5] = lo >> 16; | |
| 128 p[6] = lo >> 8; | |
| 129 p[7] = lo; | |
| 130 } | |
| 131 | |
| 132 // Efficient swapping of byte ordering | |
| 133 static inline u2 swap_u2(u2 x); | |
| 134 static inline u4 swap_u4(u4 x); | |
| 135 static inline u8 swap_u8(u8 x); | |
| 136 #else | |
| 137 // No byte-order reversal is needed | |
| 138 static inline u2 get_Java_u2(address p) { | |
| 139 return get_native_u2(p); | |
| 140 } | |
| 141 static inline u4 get_Java_u4(address p) { | |
| 142 return get_native_u4(p); | |
| 143 } | |
| 144 static inline u8 get_Java_u8(address p) { | |
| 145 return get_native_u8(p); | |
| 146 } | |
| 147 | |
| 148 static inline void put_Java_u2(address p, u2 x) { | |
| 149 put_native_u2(p, x); | |
| 150 } | |
| 151 static inline void put_Java_u4(address p, u4 x) { | |
| 152 put_native_u4(p, x); | |
| 153 } | |
| 154 static inline void put_Java_u8(address p, u8 x) { | |
| 155 put_native_u8(p, x); | |
| 156 } | |
| 157 | |
| 158 // No byte-order reversal is needed | |
| 159 static inline u2 swap_u2(u2 x) { return x; } | |
| 160 static inline u4 swap_u4(u4 x) { return x; } | |
| 161 static inline u8 swap_u8(u8 x) { return x; } | |
| 162 #endif // VM_LITTLE_ENDIAN | |
| 163 }; | |
| 164 | |
| 165 #ifdef VM_LITTLE_ENDIAN | |
| 166 // The following header contains the implementations of swap_u2, | |
| 167 // swap_u4, and swap_u8 | |
| 1972 | 168 #ifdef TARGET_OS_ARCH_linux_zero |
| 169 # include "bytes_linux_zero.inline.hpp" | |
| 170 #endif | |
| 171 | |
| 1010 | 172 #endif // VM_LITTLE_ENDIAN |
| 1972 | 173 |
| 174 #endif // CPU_ZERO_VM_BYTES_ZERO_HPP |