1 /* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 public: 26 27 // Sentinel placed in the code for interpreter returns so 28 // that i2c adapters and osr code can recognize an interpreter 29 // return address and convert the return to a specialized 30 // block of code to handle compiedl return values and cleaning 31 // the fpu stack. 32 static const int return_sentinel; 33 34 static Address::ScaleFactor stackElementScale() { return Address::times_4; } 35 36 // Offset from rsp (which points to the last stack element) 37 static int expr_offset_in_bytes(int i) { return stackElementSize * i; } 38 39 // Stack index relative to tos (which points at value) 40 static int expr_index_at(int i) { return stackElementWords * i; } 41 42 // Already negated by c++ interpreter 43 static int local_index_at(int i) { 44 assert(i <= 0, "local direction already negated"); 45 return stackElementWords * i; 46 }