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comparison src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp @ 3960:f08d439fab8c

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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
date Sun, 25 Sep 2011 16:03:29 -0700
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children 0af5da0c9d9d
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3959:eda6988c0d81 3960:f08d439fab8c
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