Mercurial > hg > truffle
view src/cpu/zero/vm/bytes_zero.hpp @ 5762:b30cced39597
generalized functionality for finding classes based on searching for patterns in source code and moved it from commands.py to mx.py
used above functionality to find classes manually excluded from JaCoCo processing
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 04 Jul 2012 21:56:48 +0200 |
parents | f08d439fab8c |
children |
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/* * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2007, 2008, 2009 Red Hat, Inc. * 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 CPU_ZERO_VM_BYTES_ZERO_HPP #define CPU_ZERO_VM_BYTES_ZERO_HPP #include "memory/allocation.hpp" typedef union unaligned { u4 u; u2 us; u8 ul; } __attribute__((packed)) unaligned; class Bytes: AllStatic { public: // Returns true if the byte ordering used by Java is different // from the native byte ordering of the underlying machine. static inline bool is_Java_byte_ordering_different() { #ifdef VM_LITTLE_ENDIAN return true; #else return false; #endif } // Efficient reading and writing of unaligned unsigned data in // platform-specific byte ordering. static inline u2 get_native_u2(address p){ unaligned *up = (unaligned *) p; return up->us; } static inline u4 get_native_u4(address p) { unaligned *up = (unaligned *) p; return up->u; } static inline u8 get_native_u8(address p) { unaligned *up = (unaligned *) p; return up->ul; } static inline void put_native_u2(address p, u2 x) { unaligned *up = (unaligned *) p; up->us = x; } static inline void put_native_u4(address p, u4 x) { unaligned *up = (unaligned *) p; up->u = x; } static inline void put_native_u8(address p, u8 x) { unaligned *up = (unaligned *) p; up->ul = x; } // Efficient reading and writing of unaligned unsigned data in Java // byte ordering (i.e. big-endian ordering). #ifdef VM_LITTLE_ENDIAN // Byte-order reversal is needed static inline u2 get_Java_u2(address p) { return (u2(p[0]) << 8) | (u2(p[1]) ); } static inline u4 get_Java_u4(address p) { return (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | (u4(p[3]) ); } static inline u8 get_Java_u8(address p) { u4 hi, lo; hi = (u4(p[0]) << 24) | (u4(p[1]) << 16) | (u4(p[2]) << 8) | (u4(p[3]) ); lo = (u4(p[4]) << 24) | (u4(p[5]) << 16) | (u4(p[6]) << 8) | (u4(p[7]) ); return u8(lo) | (u8(hi) << 32); } static inline void put_Java_u2(address p, u2 x) { p[0] = x >> 8; p[1] = x; } static inline void put_Java_u4(address p, u4 x) { p[0] = x >> 24; p[1] = x >> 16; p[2] = x >> 8; p[3] = x; } static inline void put_Java_u8(address p, u8 x) { u4 hi, lo; lo = x; hi = x >> 32; p[0] = hi >> 24; p[1] = hi >> 16; p[2] = hi >> 8; p[3] = hi; p[4] = lo >> 24; p[5] = lo >> 16; p[6] = lo >> 8; p[7] = lo; } // Efficient swapping of byte ordering static inline u2 swap_u2(u2 x); static inline u4 swap_u4(u4 x); static inline u8 swap_u8(u8 x); #else // No byte-order reversal is needed static inline u2 get_Java_u2(address p) { return get_native_u2(p); } static inline u4 get_Java_u4(address p) { return get_native_u4(p); } static inline u8 get_Java_u8(address p) { return get_native_u8(p); } static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); } static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); } static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); } // No byte-order reversal is needed static inline u2 swap_u2(u2 x) { return x; } static inline u4 swap_u4(u4 x) { return x; } static inline u8 swap_u8(u8 x) { return x; } #endif // VM_LITTLE_ENDIAN }; #ifdef VM_LITTLE_ENDIAN // The following header contains the implementations of swap_u2, // swap_u4, and swap_u8 #ifdef TARGET_OS_ARCH_linux_zero # include "bytes_linux_zero.inline.hpp" #endif #ifdef TARGET_OS_ARCH_bsd_zero # include "bytes_bsd_zero.inline.hpp" #endif #endif // VM_LITTLE_ENDIAN #endif // CPU_ZERO_VM_BYTES_ZERO_HPP