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annotate src/os_cpu/solaris_x86/vm/bytes_solaris_x86.inline.hpp @ 17606:45d7b2c7029d
Use correct kind for narrow int constants.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Thu, 16 Oct 2014 10:21:29 +0200 |
parents | f95d63e2154a |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1998, 2010, 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 |
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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 | |
1972 | 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 | |
0 | 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 | |
48 inline u8 Bytes::swap_u8(u8 x) { | |
49 #ifdef AMD64 | |
50 return _raw_swap_u8(x); | |
51 #else | |
52 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); | |
53 #endif // AMD64 | |
54 | |
55 } | |
56 | |
57 #ifndef AMD64 | |
58 // Helper function for swap_u8 | |
59 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { | |
60 return _raw_swap_u8(x, y); | |
61 } | |
62 #endif // !AMD64 | |
63 | |
64 | |
65 #ifdef _GNU_SOURCE | |
66 | |
67 extern "C" { | |
68 #ifdef AMD64 | |
69 inline u2 _raw_swap_u2(u2 x) { | |
70 register unsigned short int __dest; | |
71 __asm__ ("rorw $8, %w0": "=r" (__dest): "0" (x): "cc"); | |
72 return __dest; | |
73 } | |
74 inline u4 _raw_swap_u4(u4 x) { | |
75 register unsigned int __dest; | |
76 __asm__ ("bswap %0" : "=r" (__dest) : "0" (x)); | |
77 return __dest; | |
78 } | |
79 inline u8 _raw_swap_u8(u8 x) { | |
80 register unsigned long __dest; | |
81 __asm__ ("bswap %q0" : "=r" (__dest) : "0" (x)); | |
82 return __dest; | |
83 } | |
84 #else | |
85 inline u2 _raw_swap_u2(u2 x) { | |
86 u2 ret; | |
87 __asm__ __volatile__ ( | |
88 "movw %0, %%ax;" | |
89 "xchg %%al, %%ah;" | |
90 "movw %%ax, %0" | |
91 :"=r" (ret) // output : register 0 => ret | |
92 :"0" (x) // input : x => register 0 | |
93 :"ax", "0" // clobbered registers | |
94 ); | |
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 | |
1972 | 115 |
116 #endif // OS_CPU_SOLARIS_X86_VM_BYTES_SOLARIS_X86_INLINE_HPP |