Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/bytes_linux_x86.inline.hpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | 485d403e94e1 |
| children | c18cbe5936b8 |
| rev | line source |
|---|---|
| 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) { | |
|
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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 |