Tue, 10 Mar 2009 08:52:16 -0700
Merge
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | public: |
duke@435 | 26 | |
duke@435 | 27 | // Sentinel placed in the code for interpreter returns so |
duke@435 | 28 | // that i2c adapters and osr code can recognize an interpreter |
duke@435 | 29 | // return address and convert the return to a specialized |
duke@435 | 30 | // block of code to handle compiedl return values and cleaning |
duke@435 | 31 | // the fpu stack. |
duke@435 | 32 | static const int return_sentinel; |
duke@435 | 33 | |
duke@435 | 34 | |
duke@435 | 35 | static Address::ScaleFactor stackElementScale() { |
duke@435 | 36 | return TaggedStackInterpreter? Address::times_8 : Address::times_4; |
duke@435 | 37 | } |
duke@435 | 38 | |
duke@435 | 39 | // Offset from rsp (which points to the last stack element) |
duke@435 | 40 | static int expr_offset_in_bytes(int i) { return stackElementSize()*i ; } |
duke@435 | 41 | static int expr_tag_offset_in_bytes(int i) { |
duke@435 | 42 | assert(TaggedStackInterpreter, "should not call this"); |
duke@435 | 43 | return expr_offset_in_bytes(i) + wordSize; |
duke@435 | 44 | } |
duke@435 | 45 | |
duke@435 | 46 | // Support for Tagged Stacks |
duke@435 | 47 | |
duke@435 | 48 | // Stack index relative to tos (which points at value) |
duke@435 | 49 | static int expr_index_at(int i) { |
duke@435 | 50 | return stackElementWords() * i; |
duke@435 | 51 | } |
duke@435 | 52 | |
duke@435 | 53 | static int expr_tag_index_at(int i) { |
duke@435 | 54 | assert(TaggedStackInterpreter, "should not call this"); |
duke@435 | 55 | // tag is one word above java stack element |
duke@435 | 56 | return stackElementWords() * i + 1; |
duke@435 | 57 | } |
duke@435 | 58 | |
duke@435 | 59 | // Already negated by c++ interpreter |
duke@435 | 60 | static int local_index_at(int i) { |
duke@435 | 61 | assert(i<=0, "local direction already negated"); |
duke@435 | 62 | return stackElementWords() * i + (value_offset_in_bytes()/wordSize); |
duke@435 | 63 | } |
duke@435 | 64 | |
duke@435 | 65 | static int local_tag_index_at(int i) { |
duke@435 | 66 | assert(i<=0, "local direction already negated"); |
duke@435 | 67 | assert(TaggedStackInterpreter, "should not call this"); |
duke@435 | 68 | return stackElementWords() * i + (tag_offset_in_bytes()/wordSize); |
duke@435 | 69 | } |