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annotate src/os_cpu/solaris_x86/vm/bytes_solaris_x86.inline.hpp @ 1949:058f494c8b6d
Merge
author | trims |
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date | Fri, 10 Dec 2010 15:46:59 -0800 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 1998, 2007, 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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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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 // 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 | |
45 inline u8 Bytes::swap_u8(u8 x) { | |
46 #ifdef AMD64 | |
47 return _raw_swap_u8(x); | |
48 #else | |
49 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); | |
50 #endif // AMD64 | |
51 | |
52 } | |
53 | |
54 #ifndef AMD64 | |
55 // Helper function for swap_u8 | |
56 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { | |
57 return _raw_swap_u8(x, y); | |
58 } | |
59 #endif // !AMD64 | |
60 | |
61 | |
62 #ifdef _GNU_SOURCE | |
63 | |
64 extern "C" { | |
65 #ifdef AMD64 | |
66 inline u2 _raw_swap_u2(u2 x) { | |
67 register unsigned short int __dest; | |
68 __asm__ ("rorw $8, %w0": "=r" (__dest): "0" (x): "cc"); | |
69 return __dest; | |
70 } | |
71 inline u4 _raw_swap_u4(u4 x) { | |
72 register unsigned int __dest; | |
73 __asm__ ("bswap %0" : "=r" (__dest) : "0" (x)); | |
74 return __dest; | |
75 } | |
76 inline u8 _raw_swap_u8(u8 x) { | |
77 register unsigned long __dest; | |
78 __asm__ ("bswap %q0" : "=r" (__dest) : "0" (x)); | |
79 return __dest; | |
80 } | |
81 #else | |
82 inline u2 _raw_swap_u2(u2 x) { | |
83 u2 ret; | |
84 __asm__ __volatile__ ( | |
85 "movw %0, %%ax;" | |
86 "xchg %%al, %%ah;" | |
87 "movw %%ax, %0" | |
88 :"=r" (ret) // output : register 0 => ret | |
89 :"0" (x) // input : x => register 0 | |
90 :"ax", "0" // clobbered registers | |
91 ); | |
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 |