1 /*
2 * Copyright (c) 2001, 2017, 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
int_at(int slot) const28 jint StackValueCollection::int_at(int slot) const {
29 intptr_t val = at(slot)->get_int();
30 jint ival = *((jint*) (&val));
31 return ival;
32 }
33
long_at(int slot) const34 jlong StackValueCollection::long_at(int slot) const {
35 #ifdef _LP64
36 return at(slot+1)->get_int();
37 #else
38 union {
39 jlong jl;
40 jint array[2];
41 } value;
42 // Interpreter stack is reversed in memory:
43 // low memory location is in higher java local slot.
44 value.array[0] = at(slot+1)->get_int();
45 value.array[1] = at(slot )->get_int();
46 return value.jl;
47 #endif
48 }
49
obj_at(int slot) const50 Handle StackValueCollection::obj_at(int slot) const {
51 return at(slot)->get_obj();
52 }
53
float_at(int slot) const54 jfloat StackValueCollection::float_at(int slot) const {
55 intptr_t res = at(slot)->get_int();
56 return *((jfloat*) (&res));
57 }
58
double_at(int slot) const59 jdouble StackValueCollection::double_at(int slot) const {
60 #ifdef _LP64
61 intptr_t res = at(slot+1)->get_int();
62 return *((jdouble*) (&res));
63 #else
64 union {
65 jdouble jd;
66 jint array[2];
67 } value;
68 // Interpreter stack is reversed in memory:
69 // low memory location is in higher java local slot.
70 value.array[0] = at(slot+1)->get_int();
71 value.array[1] = at(slot )->get_int();
72 return value.jd;
73 #endif
74 }
75
set_int_at(int slot,jint value)76 void StackValueCollection::set_int_at(int slot, jint value) {
77 intptr_t val;
78 *((jint*) (&val)) = value;
79 at(slot)->set_int(val);
80 }
81
set_long_at(int slot,jlong value)82 void StackValueCollection::set_long_at(int slot, jlong value) {
83 #ifdef _LP64
84 at(slot+1)->set_int(value);
85 #else
86 union {
87 jlong jl;
88 jint array[2];
89 } x;
90 // Interpreter stack is reversed in memory:
91 // low memory location is in higher java local slot.
92 x.jl = value;
93 at(slot+1)->set_int(x.array[0]);
94 at(slot+0)->set_int(x.array[1]);
95 #endif
96 }
97
set_obj_at(int slot,Handle value)98 void StackValueCollection::set_obj_at(int slot, Handle value) {
99 at(slot)->set_obj(value);
100 }
101
set_float_at(int slot,jfloat value)102 void StackValueCollection::set_float_at(int slot, jfloat value) {
103 #ifdef _LP64
104 union {
105 intptr_t jd;
106 jint array[2];
107 } val;
108 // Interpreter stores 32 bit floats in first half of 64 bit word.
109 val.array[0] = *(jint*)(&value);
110 val.array[1] = 0;
111 at(slot)->set_int(val.jd);
112 #else
113 at(slot)->set_int(*(jint*)(&value));
114 #endif
115 }
116
set_double_at(int slot,jdouble value)117 void StackValueCollection::set_double_at(int slot, jdouble value) {
118 #ifdef _LP64
119 at(slot+1)->set_int(*(intptr_t*)(&value));
120 #else
121 union {
122 jdouble jd;
123 jint array[2];
124 } x;
125 // Interpreter stack is reversed in memory:
126 // low memory location is in higher java local slot.
127 x.jd = value;
128 at(slot+1)->set_int(x.array[0]);
129 at(slot+0)->set_int(x.array[1]);
130 #endif
131 }
132
133 #ifndef PRODUCT
print()134 void StackValueCollection::print() {
135 for(int index = 0; index < size(); index++) {
136 tty->print("\t %2d ", index);
137 at(index)->print_on(tty);
138 if( at(index )->type() == T_INT &&
139 index+1 < size() &&
140 at(index+1)->type() == T_INT ) {
141 tty->print(" " INT64_FORMAT " (long)", (int64_t)long_at(index));
142 tty->cr();
143 tty->print("\t %.15e (double)", double_at(index));
144 tty->print(" " PTR64_FORMAT " (longhex)", (int64_t)long_at(index));
145 }
146 tty->cr();
147 }
148 }
149 #endif
150