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comparison src/cpu/x86/vm/interpreter_x86.hpp @ 1506:2338d41fbd81

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6943304: remove tagged stack interpreter Reviewed-by: coleenp, never, gbenson
author twisti
date Fri, 30 Apr 2010 08:37:24 -0700
parents a61af66fc99e
children c18cbe5936b8
comparison
equal deleted inserted replaced
1505:0c5b3cf3c1f5 1506:2338d41fbd81
1 /* 1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. 2 * Copyright 1997-2010 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
29 // return address and convert the return to a specialized 29 // return address and convert the return to a specialized
30 // block of code to handle compiedl return values and cleaning 30 // block of code to handle compiedl return values and cleaning
31 // the fpu stack. 31 // the fpu stack.
32 static const int return_sentinel; 32 static const int return_sentinel;
33 33
34 34 static Address::ScaleFactor stackElementScale() { return Address::times_4; }
35 static Address::ScaleFactor stackElementScale() {
36 return TaggedStackInterpreter? Address::times_8 : Address::times_4;
37 }
38 35
39 // Offset from rsp (which points to the last stack element) 36 // Offset from rsp (which points to the last stack element)
40 static int expr_offset_in_bytes(int i) { return stackElementSize()*i ; } 37 static int expr_offset_in_bytes(int i) { return stackElementSize * i; }
41 static int expr_tag_offset_in_bytes(int i) {
42 assert(TaggedStackInterpreter, "should not call this");
43 return expr_offset_in_bytes(i) + wordSize;
44 }
45
46 // Support for Tagged Stacks
47 38
48 // Stack index relative to tos (which points at value) 39 // Stack index relative to tos (which points at value)
49 static int expr_index_at(int i) { 40 static int expr_index_at(int i) { return stackElementWords * i; }
50 return stackElementWords() * i;
51 }
52
53 static int expr_tag_index_at(int i) {
54 assert(TaggedStackInterpreter, "should not call this");
55 // tag is one word above java stack element
56 return stackElementWords() * i + 1;
57 }
58 41
59 // Already negated by c++ interpreter 42 // Already negated by c++ interpreter
60 static int local_index_at(int i) { 43 static int local_index_at(int i) {
61 assert(i<=0, "local direction already negated"); 44 assert(i <= 0, "local direction already negated");
62 return stackElementWords() * i + (value_offset_in_bytes()/wordSize); 45 return stackElementWords * i;
63 } 46 }
64
65 static int local_tag_index_at(int i) {
66 assert(i<=0, "local direction already negated");
67 assert(TaggedStackInterpreter, "should not call this");
68 return stackElementWords() * i + (tag_offset_in_bytes()/wordSize);
69 }