Mercurial > hg > truffle
view src/os_cpu/solaris_x86/vm/bytes_solaris_x86.inline.hpp @ 148:7a0a921a1a8c
Merge
author | rasbold |
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date | Wed, 14 May 2008 15:01:08 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 1998-2007 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. * */ // For Sun Studio - implementation is in solaris_i486.il. // For gcc - implementation is just below. extern "C" u2 _raw_swap_u2(u2 x); extern "C" u4 _raw_swap_u4(u4 x); #ifdef AMD64 extern "C" u8 _raw_swap_u8(u8 x); #else extern "C" u8 _raw_swap_u8(u4 x, u4 y); #endif // AMD64 // Efficient swapping of data bytes from Java byte // ordering to native byte ordering and vice versa. inline u2 Bytes::swap_u2(u2 x) { return _raw_swap_u2(x); } inline u4 Bytes::swap_u4(u4 x) { return _raw_swap_u4(x); } inline u8 Bytes::swap_u8(u8 x) { #ifdef AMD64 return _raw_swap_u8(x); #else return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); #endif // AMD64 } #ifndef AMD64 // Helper function for swap_u8 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { return _raw_swap_u8(x, y); } #endif // !AMD64 #ifdef _GNU_SOURCE extern "C" { #ifdef AMD64 inline u2 _raw_swap_u2(u2 x) { register unsigned short int __dest; __asm__ ("rorw $8, %w0": "=r" (__dest): "0" (x): "cc"); return __dest; } inline u4 _raw_swap_u4(u4 x) { register unsigned int __dest; __asm__ ("bswap %0" : "=r" (__dest) : "0" (x)); return __dest; } inline u8 _raw_swap_u8(u8 x) { register unsigned long __dest; __asm__ ("bswap %q0" : "=r" (__dest) : "0" (x)); return __dest; } #else inline u2 _raw_swap_u2(u2 x) { u2 ret; __asm__ __volatile__ ( "movw %0, %%ax;" "xchg %%al, %%ah;" "movw %%ax, %0" :"=r" (ret) // output : register 0 => ret :"0" (x) // input : x => register 0 :"ax", "0" // clobbered registers ); return ret; } inline u4 _raw_swap_u4(u4 x) { u4 ret; __asm__ __volatile__ ( "bswap %0" :"=r" (ret) // output : register 0 => ret :"0" (x) // input : x => register 0 :"0" // clobbered register ); return ret; } inline u8 _raw_swap_u8(u4 x, u4 y) { return (((u8)_raw_swap_u4(x))<<32) | _raw_swap_u4(y); } #endif // AMD64 } #endif //_GNU_SOURCE