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 Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,82 @@
1.4 +/*
1.5 + * Copyright 1998 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#pragma warning(disable: 4035) // Disable warning 4035: no return value
1.29 +
1.30 +// Efficient swapping of data bytes from Java byte
1.31 +// ordering to native byte ordering and vice versa.
1.32 +inline u2 Bytes::swap_u2(u2 x) {
1.33 +#ifdef AMD64
1.34 + address p = (address) &x;
1.35 + return ( (u2(p[0]) << 8 ) | ( u2(p[1])) );
1.36 +#else
1.37 + __asm {
1.38 + mov ax, x
1.39 + xchg al, ah
1.40 + }
1.41 + // no return statement needed, result is already in ax
1.42 + // compiler warning C4035 disabled via warning pragma
1.43 +#endif // AMD64
1.44 +}
1.45 +
1.46 +inline u4 Bytes::swap_u4(u4 x) {
1.47 +#ifdef AMD64
1.48 + address p = (address) &x;
1.49 + return ( (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | u4(p[3])) ;
1.50 +#else
1.51 + __asm {
1.52 + mov eax, x
1.53 + bswap eax
1.54 + }
1.55 + // no return statement needed, result is already in eax
1.56 + // compiler warning C4035 disabled via warning pragma
1.57 +#endif // AMD64
1.58 +}
1.59 +
1.60 +#ifdef AMD64
1.61 +inline u8 Bytes::swap_u8(u8 x) {
1.62 + address p = (address) &x;
1.63 + return ( (u8(p[0]) << 56) | (u8(p[1]) << 48) | (u8(p[2]) << 40) | (u8(p[3]) << 32) |
1.64 + (u8(p[4]) << 24) | (u8(p[5]) << 16) | (u8(p[6]) << 8) | u8(p[7])) ;
1.65 +}
1.66 +
1.67 +#else
1.68 +// Helper function for swap_u8
1.69 +inline u8 Bytes::swap_u8_base(u4 x, u4 y) {
1.70 + __asm {
1.71 + mov eax, y
1.72 + mov edx, x
1.73 + bswap eax
1.74 + bswap edx
1.75 + }
1.76 + // no return statement needed, result is already in edx:eax
1.77 + // compiler warning C4035 disabled via warning pragma
1.78 +}
1.79 +
1.80 +inline u8 Bytes::swap_u8(u8 x) {
1.81 + return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1));
1.82 +}
1.83 +#endif // AMD64
1.84 +
1.85 +#pragma warning(default: 4035) // Enable warning 4035: no return value
