diff -r fd16c54261b3 -r 489c9b5090e2 hotspot/src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/os_cpu/windows_x86/vm/bytes_windows_x86.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,82 @@ +/* + * Copyright 1998 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +#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