1 /*
2 * Copyright (c) 1998, 2007, 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 // For Sun Studio - implementation is in solaris_i486.il.
26 // For gcc - implementation is just below.
27 extern "C" u2 _raw_swap_u2(u2 x);
28 extern "C" u4 _raw_swap_u4(u4 x);
29 #ifdef AMD64
30 extern "C" u8 _raw_swap_u8(u8 x);
31 #else
32 extern "C" u8 _raw_swap_u8(u4 x, u4 y);
33 #endif // AMD64
34
35 // Efficient swapping of data bytes from Java byte
36 // ordering to native byte ordering and vice versa.
37 inline u2 Bytes::swap_u2(u2 x) {
38 return _raw_swap_u2(x);
39 }
40
41 inline u4 Bytes::swap_u4(u4 x) {
42 return _raw_swap_u4(x);
43 }
44
92 return ret;
93 }
94
95 inline u4 _raw_swap_u4(u4 x) {
96 u4 ret;
97 __asm__ __volatile__ (
98 "bswap %0"
99 :"=r" (ret) // output : register 0 => ret
100 :"0" (x) // input : x => register 0
101 :"0" // clobbered register
102 );
103 return ret;
104 }
105
106 inline u8 _raw_swap_u8(u4 x, u4 y) {
107 return (((u8)_raw_swap_u4(x))<<32) | _raw_swap_u4(y);
108 }
109 #endif // AMD64
110 }
111 #endif //_GNU_SOURCE
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1 /*
2 * Copyright (c) 1998, 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 OS_CPU_SOLARIS_X86_VM_BYTES_SOLARIS_X86_INLINE_HPP
26 #define OS_CPU_SOLARIS_X86_VM_BYTES_SOLARIS_X86_INLINE_HPP
27
28 // For Sun Studio - implementation is in solaris_i486.il.
29 // For gcc - implementation is just below.
30 extern "C" u2 _raw_swap_u2(u2 x);
31 extern "C" u4 _raw_swap_u4(u4 x);
32 #ifdef AMD64
33 extern "C" u8 _raw_swap_u8(u8 x);
34 #else
35 extern "C" u8 _raw_swap_u8(u4 x, u4 y);
36 #endif // AMD64
37
38 // Efficient swapping of data bytes from Java byte
39 // ordering to native byte ordering and vice versa.
40 inline u2 Bytes::swap_u2(u2 x) {
41 return _raw_swap_u2(x);
42 }
43
44 inline u4 Bytes::swap_u4(u4 x) {
45 return _raw_swap_u4(x);
46 }
47
95 return ret;
96 }
97
98 inline u4 _raw_swap_u4(u4 x) {
99 u4 ret;
100 __asm__ __volatile__ (
101 "bswap %0"
102 :"=r" (ret) // output : register 0 => ret
103 :"0" (x) // input : x => register 0
104 :"0" // clobbered register
105 );
106 return ret;
107 }
108
109 inline u8 _raw_swap_u8(u4 x, u4 y) {
110 return (((u8)_raw_swap_u4(x))<<32) | _raw_swap_u4(y);
111 }
112 #endif // AMD64
113 }
114 #endif //_GNU_SOURCE
115
116 #endif // OS_CPU_SOLARIS_X86_VM_BYTES_SOLARIS_X86_INLINE_HPP
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