interpreter_x86.hpp revision 0
0N/A/*
0N/A * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0N/A * CA 95054 USA or visit www.sun.com if you need additional information or
0N/A * have any questions.
0N/A *
0N/A */
0N/A
0N/A public:
0N/A
0N/A // Sentinel placed in the code for interpreter returns so
0N/A // that i2c adapters and osr code can recognize an interpreter
0N/A // return address and convert the return to a specialized
0N/A // block of code to handle compiedl return values and cleaning
0N/A // the fpu stack.
0N/A static const int return_sentinel;
0N/A
0N/A
0N/A static Address::ScaleFactor stackElementScale() {
0N/A return TaggedStackInterpreter? Address::times_8 : Address::times_4;
0N/A }
0N/A
0N/A // Offset from rsp (which points to the last stack element)
0N/A static int expr_offset_in_bytes(int i) { return stackElementSize()*i ; }
0N/A static int expr_tag_offset_in_bytes(int i) {
0N/A assert(TaggedStackInterpreter, "should not call this");
0N/A return expr_offset_in_bytes(i) + wordSize;
0N/A }
0N/A
0N/A // Support for Tagged Stacks
0N/A
0N/A // Stack index relative to tos (which points at value)
0N/A static int expr_index_at(int i) {
0N/A return stackElementWords() * i;
0N/A }
0N/A
0N/A static int expr_tag_index_at(int i) {
0N/A assert(TaggedStackInterpreter, "should not call this");
0N/A // tag is one word above java stack element
0N/A return stackElementWords() * i + 1;
0N/A }
0N/A
0N/A // Already negated by c++ interpreter
0N/A static int local_index_at(int i) {
0N/A assert(i<=0, "local direction already negated");
0N/A return stackElementWords() * i + (value_offset_in_bytes()/wordSize);
0N/A }
0N/A
0N/A static int local_tag_index_at(int i) {
0N/A assert(i<=0, "local direction already negated");
0N/A assert(TaggedStackInterpreter, "should not call this");
0N/A return stackElementWords() * i + (tag_offset_in_bytes()/wordSize);
0N/A }