Mercurial > hg > truffle

comparison src/os_cpu/linux_x86/vm/bytes_linux_x86.inline.hpp @ 0:a61af66fc99e jdk7-b24

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial load
author duke
date Sat, 01 Dec 2007 00:00:00 +0000
parents
children 485d403e94e1
comparison
equal deleted inserted replaced
-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1999-2001 Sun Microsystems, Inc. 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 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) {
63 return bswap_64(x);
64 }
65 #else
66 // Helper function for swap_u8
67 inline u8 Bytes::swap_u8_base(u4 x, u4 y) {
68 return (((u8)swap_u4(x))<<32) | swap_u4(y);
69 }
70
71 inline u8 Bytes::swap_u8(u8 x) {
72 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));
73 }
74 #endif // !AMD64