Mercurial > jdk8-mips64-public > hotspot / annotate
src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp@126ea7725993 (annotated)
src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp
Tue, 03 Aug 2010 08:13:38 -0400
- author
- bobv
- date
- Tue, 03 Aug 2010 08:13:38 -0400
- changeset 2036
- 126ea7725993
- parent 1907
- c18cbe5936b8
- child 2314
- f95d63e2154a
- permissions
- -rw-r--r--
6953477: Increase portability and flexibility of building Hotspot
Summary: A collection of portability improvements including shared code support for PPC, ARM platforms, software floating point, cross compilation support and improvements in error crash detail.
Reviewed-by: phh, never, coleenp, dholmes
| duke@435 | 1 | /* |
| trims@1907 | 2 | * Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | #pragma warning(disable: 4035) // Disable warning 4035: no return value |
| duke@435 | 26 | |
| duke@435 | 27 | // Efficient swapping of data bytes from Java byte |
| duke@435 | 28 | // ordering to native byte ordering and vice versa. |
| duke@435 | 29 | inline u2 Bytes::swap_u2(u2 x) { |
| duke@435 | 30 | #ifdef AMD64 |
| duke@435 | 31 | address p = (address) &x; |
| duke@435 | 32 | return ( (u2(p[0]) << 8 ) | ( u2(p[1])) ); |
| duke@435 | 33 | #else |
| duke@435 | 34 | __asm { |
| duke@435 | 35 | mov ax, x |
| duke@435 | 36 | xchg al, ah |
| duke@435 | 37 | } |
| duke@435 | 38 | // no return statement needed, result is already in ax |
| duke@435 | 39 | // compiler warning C4035 disabled via warning pragma |
| duke@435 | 40 | #endif // AMD64 |
| duke@435 | 41 | } |
| duke@435 | 42 | |
| duke@435 | 43 | inline u4 Bytes::swap_u4(u4 x) { |
| duke@435 | 44 | #ifdef AMD64 |
| duke@435 | 45 | address p = (address) &x; |
| duke@435 | 46 | return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ; |
| duke@435 | 47 | #else |
| duke@435 | 48 | __asm { |
| duke@435 | 49 | mov eax, x |
| duke@435 | 50 | bswap eax |
| duke@435 | 51 | } |
| duke@435 | 52 | // no return statement needed, result is already in eax |
| duke@435 | 53 | // compiler warning C4035 disabled via warning pragma |
| duke@435 | 54 | #endif // AMD64 |
| duke@435 | 55 | } |
| duke@435 | 56 | |
| duke@435 | 57 | #ifdef AMD64 |
| duke@435 | 58 | inline u8 Bytes::swap_u8(u8 x) { |
| duke@435 | 59 | address p = (address) &x; |
| duke@435 | 60 | return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) | |
| duke@435 | 61 | (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8) | u8(p[7])) ; |
| duke@435 | 62 | } |
| duke@435 | 63 | |
| duke@435 | 64 | #else |
| duke@435 | 65 | // Helper function for swap_u8 |
| duke@435 | 66 | inline u8 Bytes::swap_u8_base(u4 x, u4 y) { |
| duke@435 | 67 | __asm { |
| duke@435 | 68 | mov eax, y |
| duke@435 | 69 | mov edx, x |
| duke@435 | 70 | bswap eax |
| duke@435 | 71 | bswap edx |
| duke@435 | 72 | } |
| duke@435 | 73 | // no return statement needed, result is already in edx:eax |
| duke@435 | 74 | // compiler warning C4035 disabled via warning pragma |
| duke@435 | 75 | } |
| duke@435 | 76 | |
| duke@435 | 77 | inline u8 Bytes::swap_u8(u8 x) { |
| duke@435 | 78 | return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); |
| duke@435 | 79 | } |
| duke@435 | 80 | #endif // AMD64 |
| duke@435 | 81 | |
| duke@435 | 82 | #pragma warning(default: 4035) // Enable warning 4035: no return value |
