Mercurial > hg > truffle
view src/os_cpu/bsd_x86/vm/bytes_bsd_x86.inline.hpp @ 9228:bc82cde765b9
Disabled access using the getter in the generated code to avoid frame escapes in PE.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 22 Apr 2013 16:39:12 +0200 |
parents | 0af5da0c9d9d |
children |
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/* * Copyright (c) 1999, 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_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP #define OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP #ifdef __APPLE__ #include <libkern/OSByteOrder.h> #endif #if defined(AMD64) # if defined(__APPLE__) # define bswap_16(x) OSSwapInt16(x) # define bswap_32(x) OSSwapInt32(x) # define bswap_64(x) OSSwapInt64(x) # elif defined(__OpenBSD__) # define bswap_16(x) swap16(x) # define bswap_32(x) swap32(x) # define bswap_64(x) swap64(x) # elif defined(__NetBSD__) # define bswap_16(x) bswap16(x) # define bswap_32(x) bswap32(x) # define bswap_64(x) bswap64(x) # else # define bswap_16(x) __bswap16(x) # define bswap_32(x) __bswap32(x) # define bswap_64(x) __bswap64(x) # endif #endif // 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 return bswap_16(x); #else 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; #endif // AMD64 } inline u4 Bytes::swap_u4(u4 x) { #ifdef AMD64 return bswap_32(x); #else u4 ret; __asm__ __volatile__ ( "bswap %0" :"=r" (ret) // output : register 0 => ret :"0" (x) // input : x => register 0 :"0" // clobbered register ); return ret; #endif // AMD64 } #ifdef AMD64 inline u8 Bytes::swap_u8(u8 x) { #ifdef SPARC_WORKS // workaround for SunStudio12 CR6615391 __asm__ __volatile__ ( "bswapq %0" :"=r" (x) // output : register 0 => x :"0" (x) // input : x => register 0 :"0" // clobbered register ); return x; #else return bswap_64(x); #endif } #else // Helper function for swap_u8 inline u8 Bytes::swap_u8_base(u4 x, u4 y) { return (((u8)swap_u4(x))<<32) | swap_u4(y); } inline u8 Bytes::swap_u8(u8 x) { return swap_u8_base(*(u4*)&x, *(((u4*)&x)+1)); } #endif // !AMD64 #endif // OS_CPU_BSD_X86_VM_BYTES_BSD_X86_INLINE_HPP