| /* |
| * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP |
| #define OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP |
| |
| #pragma warning(disable: 4035) // Disable warning 4035: no return value |
| |
| // Efficient swapping of data bytes from Java byte |
| // ordering to native byte ordering and vice versa. |
| inline u2 Bytes::swap_u2(u2 x) { |
| #ifdef AMD64 |
| address p = (address) &x; |
| return ( (u2(p[0]) << 8 ) | ( u2(p[1])) ); |
| #else |
| __asm { |
| mov ax, x |
| xchg al, ah |
| } |
| // no return statement needed, result is already in ax |
| // compiler warning C4035 disabled via warning pragma |
| #endif // AMD64 |
| } |
| |
| inline u4 Bytes::swap_u4(u4 x) { |
| #ifdef AMD64 |
| address p = (address) &x; |
| return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ; |
| #else |
| __asm { |
| mov eax, x |
| bswap eax |
| } |
| // no return statement needed, result is already in eax |
| // compiler warning C4035 disabled via warning pragma |
| #endif // AMD64 |
| } |
| |
| #ifdef AMD64 |
| inline u8 Bytes::swap_u8(u8 x) { |
| address p = (address) &x; |
| return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) | |
| (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8) | u8(p[7])) ; |
| } |
| |
| #else |
| // Helper function for swap_u8 |
| inline u8 Bytes::swap_u8_base(u4 x, u4 y) { |
| __asm { |
| mov eax, y |
| mov edx, x |
| bswap eax |
| bswap edx |
| } |
| // no return statement needed, result is already in edx:eax |
| // compiler warning C4035 disabled via warning pragma |
| } |
| |
| inline u8 Bytes::swap_u8(u8 x) { |
| return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); |
| } |
| #endif // AMD64 |
| |
| #pragma warning(default: 4035) // Enable warning 4035: no return value |
| |
| #endif // OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP |