1 /*
2 * Copyright (c) 2001, 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 #include "precompiled.hpp"
26 #include "runtime/stackValueCollection.hpp"
27 #ifdef TARGET_ARCH_x86
28 # include "jniTypes_x86.hpp"
29 #endif
30 #ifdef TARGET_ARCH_sparc
31 # include "jniTypes_sparc.hpp"
32 #endif
33 #ifdef TARGET_ARCH_zero
34 # include "jniTypes_zero.hpp"
35 #endif
36
37 jint StackValueCollection::int_at(int slot) const {
38 intptr_t val = at(slot)->get_int();
39 jint ival = *((jint*) (&val));
40 return ival;
41 }
42
43 jlong StackValueCollection::long_at(int slot) const {
44 #ifdef _LP64
45 return at(slot+1)->get_int();
46 #else
47 union {
48 jlong jl;
49 jint array[2];
50 } value;
51 // Interpreter stack is reversed in memory:
52 // low memory location is in higher java local slot.
53 value.array[0] = at(slot+1)->get_int();
54 value.array[1] = at(slot )->get_int();
55 return value.jl;
56 #endif
57 }
58
59 Handle StackValueCollection::obj_at(int slot) const {
60 return at(slot)->get_obj();
61 }
62
63 jfloat StackValueCollection::float_at(int slot) const {
64 intptr_t res = at(slot)->get_int();
65 return *((jfloat*) (&res));
66 }
67
68 jdouble StackValueCollection::double_at(int slot) const {
69 #ifdef _LP64
70 intptr_t res = at(slot+1)->get_int();
71 return *((jdouble*) (&res));
72 #else
73 union {
74 jdouble jd;
75 jint array[2];
76 } value;
77 // Interpreter stack is reversed in memory:
78 // low memory location is in higher java local slot.
79 value.array[0] = at(slot+1)->get_int();
80 value.array[1] = at(slot )->get_int();
81 return value.jd;
82 #endif
83 }
84
85 void StackValueCollection::set_int_at(int slot, jint value) {
86 intptr_t val;
87 *((jint*) (&val)) = value;
88 at(slot)->set_int(val);
89 }
90
91 void StackValueCollection::set_long_at(int slot, jlong value) {
92 #ifdef _LP64
93 at(slot+1)->set_int(value);
94 #else
95 union {
96 jlong jl;
97 jint array[2];
98 } x;
99 // Interpreter stack is reversed in memory:
100 // low memory location is in higher java local slot.
101 x.jl = value;
102 at(slot+1)->set_int(x.array[0]);
103 at(slot+0)->set_int(x.array[1]);
104 #endif
105 }
106
107 void StackValueCollection::set_obj_at(int slot, Handle value) {
108 at(slot)->set_obj(value);
109 }
110
111 void StackValueCollection::set_float_at(int slot, jfloat value) {
112 #ifdef _LP64
113 union {
114 intptr_t jd;
115 jint array[2];
116 } val;
117 // Interpreter stores 32 bit floats in first half of 64 bit word.
118 val.array[0] = *(jint*)(&value);
119 val.array[1] = 0;
120 at(slot)->set_int(val.jd);
121 #else
122 at(slot)->set_int(*(jint*)(&value));
123 #endif
124 }
125
126 void StackValueCollection::set_double_at(int slot, jdouble value) {
127 #ifdef _LP64
128 at(slot+1)->set_int(*(intptr_t*)(&value));
129 #else
130 union {
131 jdouble jd;
132 jint array[2];
133 } x;
134 // Interpreter stack is reversed in memory:
135 // low memory location is in higher java local slot.
136 x.jd = value;
137 at(slot+1)->set_int(x.array[0]);
138 at(slot+0)->set_int(x.array[1]);
139 #endif
140 }
141
142 #ifndef PRODUCT
143 void StackValueCollection::print() {
144 for(int index = 0; index < size(); index++) {
145 tty->print("\t %2d ", index);
146 at(index)->print_on(tty);
147 if( at(index )->type() == T_INT &&
148 index+1 < size() &&
149 at(index+1)->type() == T_INT ) {
150 tty->print(" " INT64_FORMAT " (long)", long_at(index));
151 tty->cr();
152 tty->print("\t %.15e (double)", double_at(index));
153 tty->print(" " PTR64_FORMAT " (longhex)", long_at(index));
154 }
155 tty->cr();
156 }
157 }
158 #endif