1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,87 @@
1.4 +/*
1.5 + * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP
1.29 +#define OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP
1.30 +
1.31 +#pragma warning(disable: 4035) // Disable warning 4035: no return value
1.32 +
1.33 +// Efficient swapping of data bytes from Java byte
1.34 +// ordering to native byte ordering and vice versa.
1.35 +inline u2 Bytes::swap_u2(u2 x) {
1.36 +#ifdef AMD64
1.37 + address p = (address) &x;
1.38 + return ( (u2(p[0]) << 8 ) | ( u2(p[1])) );
1.39 +#else
1.40 + __asm {
1.41 + mov ax, x
1.42 + xchg al, ah
1.43 + }
1.44 + // no return statement needed, result is already in ax
1.45 + // compiler warning C4035 disabled via warning pragma
1.46 +#endif // AMD64
1.47 +}
1.48 +
1.49 +inline u4 Bytes::swap_u4(u4 x) {
1.50 +#ifdef AMD64
1.51 + address p = (address) &x;
1.52 + return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ;
1.53 +#else
1.54 + __asm {
1.55 + mov eax, x
1.56 + bswap eax
1.57 + }
1.58 + // no return statement needed, result is already in eax
1.59 + // compiler warning C4035 disabled via warning pragma
1.60 +#endif // AMD64
1.61 +}
1.62 +
1.63 +#ifdef AMD64
1.64 +inline u8 Bytes::swap_u8(u8 x) {
1.65 + address p = (address) &x;
1.66 + return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) |
1.67 + (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8) | u8(p[7])) ;
1.68 +}
1.69 +
1.70 +#else
1.71 +// Helper function for swap_u8
1.72 +inline u8 Bytes::swap_u8_base(u4 x, u4 y) {
1.73 + __asm {
1.74 + mov eax, y
1.75 + mov edx, x
1.76 + bswap eax
1.77 + bswap edx
1.78 + }
1.79 + // no return statement needed, result is already in edx:eax
1.80 + // compiler warning C4035 disabled via warning pragma
1.81 +}
1.82 +
1.83 +inline u8 Bytes::swap_u8(u8 x) {
1.84 + return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));
1.85 +}
1.86 +#endif // AMD64
1.87 +
1.88 +#pragma warning(default: 4035) // Enable warning 4035: no return value
1.89 +
1.90 +#endif // OS_CPU_WINDOWS_X86_VM_BYTES_WINDOWS_X86_INLINE_HPP
