Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/bytes_linux_x86.inline.hpp @ 660:0aeec7d15d30
Merge
author | acorn |
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date | Fri, 27 Mar 2009 14:35:44 -0400 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1999-2008 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include <byteswap.h> | |
26 | |
27 // Efficient swapping of data bytes from Java byte | |
28 // ordering to native byte ordering and vice versa. | |
29 inline u2 Bytes::swap_u2(u2 x) { | |
30 #ifdef AMD64 | |
31 return bswap_16(x); | |
32 #else | |
33 u2 ret; | |
34 __asm__ __volatile__ ( | |
35 "movw %0, %%ax;" | |
36 "xchg %%al, %%ah;" | |
37 "movw %%ax, %0" | |
38 :"=r" (ret) // output : register 0 => ret | |
39 :"0" (x) // input : x => register 0 | |
40 :"ax", "0" // clobbered registers | |
41 ); | |
42 return ret; | |
43 #endif // AMD64 | |
44 } | |
45 | |
46 inline u4 Bytes::swap_u4(u4 x) { | |
47 #ifdef AMD64 | |
48 return bswap_32(x); | |
49 #else | |
50 u4 ret; | |
51 __asm__ __volatile__ ( | |
52 "bswap %0" | |
53 :"=r" (ret) // output : register 0 => ret | |
54 :"0" (x) // input : x => register 0 | |
55 :"0" // clobbered register | |
56 ); | |
57 return ret; | |
58 #endif // AMD64 | |
59 } | |
60 | |
61 #ifdef AMD64 | |
62 inline u8 Bytes::swap_u8(u8 x) { | |
50
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63 #ifdef SPARC_WORKS |
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64 // workaround for SunStudio12 CR6615391 |
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65 __asm__ __volatile__ ( |
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66 "bswapq %0" |
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67 :"=r" (x) // output : register 0 => x |
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68 :"0" (x) // input : x => register 0 |
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69 :"0" // clobbered register |
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70 ); |
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71 return x; |
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72 #else |
0 | 73 return bswap_64(x); |
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74 #endif |
0 | 75 } |
76 #else | |
77 // Helper function for swap_u8 | |
78 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { | |
79 return (((u8)swap_u4(x))<<32) | swap_u4(y); | |
80 } | |
81 | |
82 inline u8 Bytes::swap_u8(u8 x) { | |
83 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); | |
84 } | |
85 #endif // !AMD64 |