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6890308: integrate zero assembler hotspot changes
Reviewed-by: never
This commit is contained in:
Gary Benson
Tom Rodriguez
parent
9b306d03ee
commit
5473f394c6
108 changed files with 7657 additions and 56 deletions
164
hotspot/src/cpu/zero/vm/bytes_zero.hpp
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164
hotspot/src/cpu/zero/vm/bytes_zero.hpp
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/*
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* Copyright 1997-2002 Sun Microsystems, Inc. All Rights Reserved.
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* Copyright 2007, 2008, 2009 Red Hat, Inc.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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typedef union unaligned {
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u4 u;
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u2 us;
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u8 ul;
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} __attribute__((packed)) unaligned;
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class Bytes: AllStatic {
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public:
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// Returns true if the byte ordering used by Java is different
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// from the native byte ordering of the underlying machine.
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static inline bool is_Java_byte_ordering_different() {
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#ifdef VM_LITTLE_ENDIAN
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return true;
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#else
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return false;
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#endif
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}
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// Efficient reading and writing of unaligned unsigned data in
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// platform-specific byte ordering.
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static inline u2 get_native_u2(address p){
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unaligned *up = (unaligned *) p;
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return up->us;
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}
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static inline u4 get_native_u4(address p) {
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unaligned *up = (unaligned *) p;
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return up->u;
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}
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static inline u8 get_native_u8(address p) {
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unaligned *up = (unaligned *) p;
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return up->ul;
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}
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static inline void put_native_u2(address p, u2 x) {
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unaligned *up = (unaligned *) p;
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up->us = x;
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}
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static inline void put_native_u4(address p, u4 x) {
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unaligned *up = (unaligned *) p;
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up->u = x;
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}
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static inline void put_native_u8(address p, u8 x) {
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unaligned *up = (unaligned *) p;
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up->ul = x;
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}
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// Efficient reading and writing of unaligned unsigned data in Java
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// byte ordering (i.e. big-endian ordering).
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#ifdef VM_LITTLE_ENDIAN
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// Byte-order reversal is needed
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static inline u2 get_Java_u2(address p) {
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return (u2(p[0]) << 8) |
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(u2(p[1]) );
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}
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static inline u4 get_Java_u4(address p) {
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return (u4(p[0]) << 24) |
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(u4(p[1]) << 16) |
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(u4(p[2]) << 8) |
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(u4(p[3]) );
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}
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static inline u8 get_Java_u8(address p) {
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u4 hi, lo;
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hi = (u4(p[0]) << 24) |
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(u4(p[1]) << 16) |
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(u4(p[2]) << 8) |
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(u4(p[3]) );
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lo = (u4(p[4]) << 24) |
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(u4(p[5]) << 16) |
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(u4(p[6]) << 8) |
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(u4(p[7]) );
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return u8(lo) | (u8(hi) << 32);
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}
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static inline void put_Java_u2(address p, u2 x) {
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p[0] = x >> 8;
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p[1] = x;
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}
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static inline void put_Java_u4(address p, u4 x) {
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p[0] = x >> 24;
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p[1] = x >> 16;
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p[2] = x >> 8;
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p[3] = x;
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}
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static inline void put_Java_u8(address p, u8 x) {
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u4 hi, lo;
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lo = x;
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hi = x >> 32;
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p[0] = hi >> 24;
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p[1] = hi >> 16;
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p[2] = hi >> 8;
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p[3] = hi;
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p[4] = lo >> 24;
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p[5] = lo >> 16;
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p[6] = lo >> 8;
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p[7] = lo;
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}
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// Efficient swapping of byte ordering
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static inline u2 swap_u2(u2 x);
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static inline u4 swap_u4(u4 x);
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static inline u8 swap_u8(u8 x);
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#else
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// No byte-order reversal is needed
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static inline u2 get_Java_u2(address p) {
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return get_native_u2(p);
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}
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static inline u4 get_Java_u4(address p) {
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return get_native_u4(p);
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}
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static inline u8 get_Java_u8(address p) {
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return get_native_u8(p);
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}
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static inline void put_Java_u2(address p, u2 x) {
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put_native_u2(p, x);
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}
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static inline void put_Java_u4(address p, u4 x) {
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put_native_u4(p, x);
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}
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static inline void put_Java_u8(address p, u8 x) {
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put_native_u8(p, x);
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}
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// No byte-order reversal is needed
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static inline u2 swap_u2(u2 x) { return x; }
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static inline u4 swap_u4(u4 x) { return x; }
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static inline u8 swap_u8(u8 x) { return x; }
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#endif // VM_LITTLE_ENDIAN
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};
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#ifdef VM_LITTLE_ENDIAN
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// The following header contains the implementations of swap_u2,
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// swap_u4, and swap_u8
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#include "incls/_bytes_pd.inline.hpp.incl"
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#endif // VM_LITTLE_ENDIAN
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