Mercurial > hg > truffle
annotate src/cpu/sparc/vm/bytes_sparc.hpp @ 1683:99ceb0e99c9e
Merge
author | never |
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date | Mon, 26 Jul 2010 15:58:07 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 class Bytes: AllStatic { | |
26 public: | |
27 // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering | |
28 // Sparc needs to check for alignment. | |
29 | |
30 // can I count on address always being a pointer to an unsigned char? Yes | |
31 | |
32 // Returns true, if the byte ordering used by Java is different from the nativ byte ordering | |
33 // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc. | |
34 static inline bool is_Java_byte_ordering_different() { return false; } | |
35 | |
36 // Thus, a swap between native and Java ordering is always a no-op: | |
37 static inline u2 swap_u2(u2 x) { return x; } | |
38 static inline u4 swap_u4(u4 x) { return x; } | |
39 static inline u8 swap_u8(u8 x) { return x; } | |
40 | |
41 static inline u2 get_native_u2(address p){ | |
42 return (intptr_t(p) & 1) == 0 | |
43 ? *(u2*)p | |
44 : ( u2(p[0]) << 8 ) | |
45 | ( u2(p[1]) ); | |
46 } | |
47 | |
48 static inline u4 get_native_u4(address p) { | |
49 switch (intptr_t(p) & 3) { | |
50 case 0: return *(u4*)p; | |
51 | |
52 case 2: return ( u4( ((u2*)p)[0] ) << 16 ) | |
53 | ( u4( ((u2*)p)[1] ) ); | |
54 | |
55 default: return ( u4(p[0]) << 24 ) | |
56 | ( u4(p[1]) << 16 ) | |
57 | ( u4(p[2]) << 8 ) | |
58 | u4(p[3]); | |
59 } | |
60 } | |
61 | |
62 static inline u8 get_native_u8(address p) { | |
63 switch (intptr_t(p) & 7) { | |
64 case 0: return *(u8*)p; | |
65 | |
66 case 4: return ( u8( ((u4*)p)[0] ) << 32 ) | |
67 | ( u8( ((u4*)p)[1] ) ); | |
68 | |
69 case 2: return ( u8( ((u2*)p)[0] ) << 48 ) | |
70 | ( u8( ((u2*)p)[1] ) << 32 ) | |
71 | ( u8( ((u2*)p)[2] ) << 16 ) | |
72 | ( u8( ((u2*)p)[3] ) ); | |
73 | |
74 default: return ( u8(p[0]) << 56 ) | |
75 | ( u8(p[1]) << 48 ) | |
76 | ( u8(p[2]) << 40 ) | |
77 | ( u8(p[3]) << 32 ) | |
78 | ( u8(p[4]) << 24 ) | |
79 | ( u8(p[5]) << 16 ) | |
80 | ( u8(p[6]) << 8 ) | |
81 | u8(p[7]); | |
82 } | |
83 } | |
84 | |
85 | |
86 | |
87 static inline void put_native_u2(address p, u2 x) { | |
88 if ( (intptr_t(p) & 1) == 0 ) *(u2*)p = x; | |
89 else { | |
90 p[0] = x >> 8; | |
91 p[1] = x; | |
92 } | |
93 } | |
94 | |
95 static inline void put_native_u4(address p, u4 x) { | |
96 switch ( intptr_t(p) & 3 ) { | |
97 case 0: *(u4*)p = x; | |
98 break; | |
99 | |
100 case 2: ((u2*)p)[0] = x >> 16; | |
101 ((u2*)p)[1] = x; | |
102 break; | |
103 | |
104 default: ((u1*)p)[0] = x >> 24; | |
105 ((u1*)p)[1] = x >> 16; | |
106 ((u1*)p)[2] = x >> 8; | |
107 ((u1*)p)[3] = x; | |
108 break; | |
109 } | |
110 } | |
111 | |
112 static inline void put_native_u8(address p, u8 x) { | |
113 switch ( intptr_t(p) & 7 ) { | |
114 case 0: *(u8*)p = x; | |
115 break; | |
116 | |
117 case 4: ((u4*)p)[0] = x >> 32; | |
118 ((u4*)p)[1] = x; | |
119 break; | |
120 | |
121 case 2: ((u2*)p)[0] = x >> 48; | |
122 ((u2*)p)[1] = x >> 32; | |
123 ((u2*)p)[2] = x >> 16; | |
124 ((u2*)p)[3] = x; | |
125 break; | |
126 | |
127 default: ((u1*)p)[0] = x >> 56; | |
128 ((u1*)p)[1] = x >> 48; | |
129 ((u1*)p)[2] = x >> 40; | |
130 ((u1*)p)[3] = x >> 32; | |
131 ((u1*)p)[4] = x >> 24; | |
132 ((u1*)p)[5] = x >> 16; | |
133 ((u1*)p)[6] = x >> 8; | |
134 ((u1*)p)[7] = x; | |
135 } | |
136 } | |
137 | |
138 | |
139 // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering) | |
140 // (no byte-order reversal is needed since SPARC CPUs are big-endian oriented) | |
141 static inline u2 get_Java_u2(address p) { return get_native_u2(p); } | |
142 static inline u4 get_Java_u4(address p) { return get_native_u4(p); } | |
143 static inline u8 get_Java_u8(address p) { return get_native_u8(p); } | |
144 | |
145 static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); } | |
146 static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); } | |
147 static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); } | |
148 }; | |
149 | |
150 //Reconciliation History | |
151 // 1.7 98/02/24 10:18:41 bytes_i486.hpp | |
152 // 1.10 98/04/08 18:47:57 bytes_i486.hpp | |
153 // 1.13 98/07/15 17:10:03 bytes_i486.hpp | |
154 // 1.14 98/08/13 10:38:23 bytes_i486.hpp | |
155 // 1.15 98/10/05 16:30:21 bytes_i486.hpp | |
156 // 1.17 99/06/22 16:37:35 bytes_i486.hpp | |
157 //End |