1 /*
2 * Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
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 )
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
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1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_SPARC_VM_BYTES_SPARC_HPP
26 #define CPU_SPARC_VM_BYTES_SPARC_HPP
27
28 #include "memory/allocation.hpp"
29
30 class Bytes: AllStatic {
31 public:
32 // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering
33 // Sparc needs to check for alignment.
34
35 // can I count on address always being a pointer to an unsigned char? Yes
36
37 // Returns true, if the byte ordering used by Java is different from the nativ byte ordering
38 // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc.
39 static inline bool is_Java_byte_ordering_different() { return false; }
40
41 // Thus, a swap between native and Java ordering is always a no-op:
42 static inline u2 swap_u2(u2 x) { return x; }
43 static inline u4 swap_u4(u4 x) { return x; }
44 static inline u8 swap_u8(u8 x) { return x; }
45
46 static inline u2 get_native_u2(address p){
47 return (intptr_t(p) & 1) == 0
48 ? *(u2*)p
49 : ( u2(p[0]) << 8 )
143
144 // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering)
145 // (no byte-order reversal is needed since SPARC CPUs are big-endian oriented)
146 static inline u2 get_Java_u2(address p) { return get_native_u2(p); }
147 static inline u4 get_Java_u4(address p) { return get_native_u4(p); }
148 static inline u8 get_Java_u8(address p) { return get_native_u8(p); }
149
150 static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); }
151 static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); }
152 static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); }
153 };
154
155 //Reconciliation History
156 // 1.7 98/02/24 10:18:41 bytes_i486.hpp
157 // 1.10 98/04/08 18:47:57 bytes_i486.hpp
158 // 1.13 98/07/15 17:10:03 bytes_i486.hpp
159 // 1.14 98/08/13 10:38:23 bytes_i486.hpp
160 // 1.15 98/10/05 16:30:21 bytes_i486.hpp
161 // 1.17 99/06/22 16:37:35 bytes_i486.hpp
162 //End
163
164 #endif // CPU_SPARC_VM_BYTES_SPARC_HPP
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