Mercurial > hg > truffle
comparison src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp @ 3960:f08d439fab8c
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author | never |
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date | Sun, 25 Sep 2011 16:03:29 -0700 |
parents | |
children | 0af5da0c9d9d |
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1 /* | |
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. | |
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 #ifndef OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP | |
26 #define OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP | |
27 | |
28 #ifndef _ALLBSD_SOURCE | |
29 #include <byteswap.h> | |
30 #endif | |
31 | |
32 #ifdef __APPLE__ | |
33 #include <libkern/OSByteOrder.h> | |
34 #endif | |
35 | |
36 #if defined(AMD64) | |
37 # if defined(__APPLE__) | |
38 # define bswap_16(x) OSSwapInt16(x) | |
39 # define bswap_32(x) OSSwapInt32(x) | |
40 # define bswap_64(x) OSSwapInt64(x) | |
41 # elif defined(__OpenBSD__) | |
42 # define bswap_16(x) swap16(x) | |
43 # define bswap_32(x) swap32(x) | |
44 # define bswap_64(x) swap64(x) | |
45 # elif defined(__NetBSD__) | |
46 # define bswap_16(x) bswap16(x) | |
47 # define bswap_32(x) bswap32(x) | |
48 # define bswap_64(x) bswap64(x) | |
49 # else | |
50 # define bswap_16(x) __bswap16(x) | |
51 # define bswap_32(x) __bswap32(x) | |
52 # define bswap_64(x) __bswap64(x) | |
53 # endif | |
54 #endif | |
55 | |
56 // Efficient swapping of data bytes from Java byte | |
57 // ordering to native byte ordering and vice versa. | |
58 inline u2 Bytes::swap_u2(u2 x) { | |
59 #ifdef AMD64 | |
60 return bswap_16(x); | |
61 #else | |
62 u2 ret; | |
63 __asm__ __volatile__ ( | |
64 "movw %0, %%ax;" | |
65 "xchg %%al, %%ah;" | |
66 "movw %%ax, %0" | |
67 :"=r" (ret) // output : register 0 => ret | |
68 :"0" (x) // input : x => register 0 | |
69 :"ax", "0" // clobbered registers | |
70 ); | |
71 return ret; | |
72 #endif // AMD64 | |
73 } | |
74 | |
75 inline u4 Bytes::swap_u4(u4 x) { | |
76 #ifdef AMD64 | |
77 return bswap_32(x); | |
78 #else | |
79 u4 ret; | |
80 __asm__ __volatile__ ( | |
81 "bswap %0" | |
82 :"=r" (ret) // output : register 0 => ret | |
83 :"0" (x) // input : x => register 0 | |
84 :"0" // clobbered register | |
85 ); | |
86 return ret; | |
87 #endif // AMD64 | |
88 } | |
89 | |
90 #ifdef AMD64 | |
91 inline u8 Bytes::swap_u8(u8 x) { | |
92 #ifdef SPARC_WORKS | |
93 // workaround for SunStudio12 CR6615391 | |
94 __asm__ __volatile__ ( | |
95 "bswapq %0" | |
96 :"=r" (x) // output : register 0 => x | |
97 :"0" (x) // input : x => register 0 | |
98 :"0" // clobbered register | |
99 ); | |
100 return x; | |
101 #else | |
102 return bswap_64(x); | |
103 #endif | |
104 } | |
105 #else | |
106 // Helper function for swap_u8 | |
107 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { | |
108 return (((u8)swap_u4(x))<<32) | swap_u4(y); | |
109 } | |
110 | |
111 inline u8 Bytes::swap_u8(u8 x) { | |
112 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); | |
113 } | |
114 #endif // !AMD64 | |
115 | |
116 #endif // OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP |