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annotate src/os_cpu/linux_x86/vm/bytes_linux_x86.inline.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
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| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 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_LINUX_X86_VM_BYTES_LINUX_X86_INLINE_HPP |
| 26 #define OS_CPU_LINUX_X86_VM_BYTES_LINUX_X86_INLINE_HPP | |
| 27 | |
| 0 | 28 #include <byteswap.h> |
| 29 | |
| 30 // Efficient swapping of data bytes from Java byte | |
| 31 // ordering to native byte ordering and vice versa. | |
| 32 inline u2 Bytes::swap_u2(u2 x) { | |
| 33 #ifdef AMD64 | |
| 34 return bswap_16(x); | |
| 35 #else | |
| 36 u2 ret; | |
| 37 __asm__ __volatile__ ( | |
| 38 "movw %0, %%ax;" | |
| 39 "xchg %%al, %%ah;" | |
| 40 "movw %%ax, %0" | |
| 41 :"=r" (ret) // output : register 0 => ret | |
| 42 :"0" (x) // input : x => register 0 | |
| 43 :"ax", "0" // clobbered registers | |
| 44 ); | |
| 45 return ret; | |
| 46 #endif // AMD64 | |
| 47 } | |
| 48 | |
| 49 inline u4 Bytes::swap_u4(u4 x) { | |
| 50 #ifdef AMD64 | |
| 51 return bswap_32(x); | |
| 52 #else | |
| 53 u4 ret; | |
| 54 __asm__ __volatile__ ( | |
| 55 "bswap %0" | |
| 56 :"=r" (ret) // output : register 0 => ret | |
| 57 :"0" (x) // input : x => register 0 | |
| 58 :"0" // clobbered register | |
| 59 ); | |
| 60 return ret; | |
| 61 #endif // AMD64 | |
| 62 } | |
| 63 | |
| 64 #ifdef AMD64 | |
| 65 inline u8 Bytes::swap_u8(u8 x) { | |
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66 #ifdef SPARC_WORKS |
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67 // workaround for SunStudio12 CR6615391 |
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68 __asm__ __volatile__ ( |
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69 "bswapq %0" |
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70 :"=r" (x) // output : register 0 => x |
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71 :"0" (x) // input : x => register 0 |
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72 :"0" // clobbered register |
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73 ); |
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74 return x; |
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75 #else |
| 0 | 76 return bswap_64(x); |
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77 #endif |
| 0 | 78 } |
| 79 #else | |
| 80 // Helper function for swap_u8 | |
| 81 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { | |
| 82 return (((u8)swap_u4(x))<<32) | swap_u4(y); | |
| 83 } | |
| 84 | |
| 85 inline u8 Bytes::swap_u8(u8 x) { | |
| 86 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); | |
| 87 } | |
| 88 #endif // !AMD64 | |
| 1972 | 89 |
| 90 #endif // OS_CPU_LINUX_X86_VM_BYTES_LINUX_X86_INLINE_HPP |