Mercurial > hg > truffle
comparison src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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1 /* | |
2 * Copyright 1998 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 #pragma warning(disable: 4035) // Disable warning 4035: no return value | |
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 address p = (address) &x; | |
32 return ( (u2(p[0]) << 8 ) | ( u2(p[1])) ); | |
33 #else | |
34 __asm { | |
35 mov ax, x | |
36 xchg al, ah | |
37 } | |
38 // no return statement needed, result is already in ax | |
39 // compiler warning C4035 disabled via warning pragma | |
40 #endif // AMD64 | |
41 } | |
42 | |
43 inline u4 Bytes::swap_u4(u4 x) { | |
44 #ifdef AMD64 | |
45 address p = (address) &x; | |
46 return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ; | |
47 #else | |
48 __asm { | |
49 mov eax, x | |
50 bswap eax | |
51 } | |
52 // no return statement needed, result is already in eax | |
53 // compiler warning C4035 disabled via warning pragma | |
54 #endif // AMD64 | |
55 } | |
56 | |
57 #ifdef AMD64 | |
58 inline u8 Bytes::swap_u8(u8 x) { | |
59 address p = (address) &x; | |
60 return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) | | |
61 (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8) | u8(p[7])) ; | |
62 } | |
63 | |
64 #else | |
65 // Helper function for swap_u8 | |
66 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { | |
67 __asm { | |
68 mov eax, y | |
69 mov edx, x | |
70 bswap eax | |
71 bswap edx | |
72 } | |
73 // no return statement needed, result is already in edx:eax | |
74 // compiler warning C4035 disabled via warning pragma | |
75 } | |
76 | |
77 inline u8 Bytes::swap_u8(u8 x) { | |
78 return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); | |
79 } | |
80 #endif // AMD64 | |
81 | |
82 #pragma warning(default: 4035) // Enable warning 4035: no return value |