1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <stdlib.h>
#include <limits>
#include "src/v8.h"
#include "src/base/platform/platform.h"
#include "src/code-stubs.h"
#include "src/double.h"
#include "src/heap/factory.h"
#include "src/macro-assembler.h"
#include "src/objects-inl.h"
#include "test/cctest/cctest.h"
#include "test/cctest/test-code-stubs.h"
namespace v8 {
namespace internal {
int STDCALL ConvertDToICVersion(double d) {
#if defined(V8_TARGET_BIG_ENDIAN)
const int kExponentIndex = 0;
const int kMantissaIndex = 1;
#elif defined(V8_TARGET_LITTLE_ENDIAN)
const int kExponentIndex = 1;
const int kMantissaIndex = 0;
#else
#error Unsupported endianness
#endif
uint32_t u[2];
memcpy(u, &d, sizeof(d));
uint32_t exponent_bits = u[kExponentIndex];
int32_t shifted_mask = static_cast<int32_t>(Double::kExponentMask >> 32);
int32_t exponent = (((exponent_bits & shifted_mask) >>
(Double::kPhysicalSignificandSize - 32)) -
HeapNumber::kExponentBias);
if (exponent < 0) {
return 0;
}
uint32_t unsigned_exponent = static_cast<uint32_t>(exponent);
int result = 0;
uint32_t max_exponent =
static_cast<uint32_t>(Double::kPhysicalSignificandSize);
if (unsigned_exponent >= max_exponent) {
if ((exponent - Double::kPhysicalSignificandSize) < 32) {
result = u[kMantissaIndex]
<< (exponent - Double::kPhysicalSignificandSize);
}
} else {
uint64_t big_result =
(bit_cast<uint64_t>(d) & Double::kSignificandMask) | Double::kHiddenBit;
big_result = big_result >> (Double::kPhysicalSignificandSize - exponent);
result = static_cast<uint32_t>(big_result);
}
if (static_cast<int32_t>(exponent_bits) < 0) {
return (0 - result);
} else {
return result;
}
}
void RunOneTruncationTestWithTest(ConvertDToICallWrapper callWrapper,
ConvertDToIFunc func,
double from,
int32_t to) {
int32_t result = (*callWrapper)(func, from);
CHECK_EQ(to, result);
}
DISABLE_CFI_ICALL
int32_t DefaultCallWrapper(ConvertDToIFunc func,
double from) {
return (*func)(from);
}
// #define NaN and Infinity so that it's possible to cut-and-paste these tests
// directly to a .js file and run them.
#define NaN (std::numeric_limits<double>::quiet_NaN())
#define Infinity (std::numeric_limits<double>::infinity())
#define RunOneTruncationTest(p1, p2) \
RunOneTruncationTestWithTest(callWrapper, func, p1, p2)
void RunAllTruncationTests(ConvertDToIFunc func) {
RunAllTruncationTests(DefaultCallWrapper, func);
}
void RunAllTruncationTests(ConvertDToICallWrapper callWrapper,
ConvertDToIFunc func) {
RunOneTruncationTest(0, 0);
RunOneTruncationTest(0.5, 0);
RunOneTruncationTest(-0.5, 0);
RunOneTruncationTest(1.5, 1);
RunOneTruncationTest(-1.5, -1);
RunOneTruncationTest(5.5, 5);
RunOneTruncationTest(-5.0, -5);
RunOneTruncationTest(NaN, 0);
RunOneTruncationTest(Infinity, 0);
RunOneTruncationTest(-NaN, 0);
RunOneTruncationTest(-Infinity, 0);
RunOneTruncationTest(4.94065645841e-324, 0);
RunOneTruncationTest(-4.94065645841e-324, 0);
RunOneTruncationTest(0.9999999999999999, 0);
RunOneTruncationTest(-0.9999999999999999, 0);
RunOneTruncationTest(4294967296.0, 0);
RunOneTruncationTest(-4294967296.0, 0);
RunOneTruncationTest(9223372036854775000.0, -1024);
RunOneTruncationTest(-9223372036854775000.0, 1024);
RunOneTruncationTest(4.5036e+15, 372629504);
RunOneTruncationTest(-4.5036e+15, -372629504);
RunOneTruncationTest(287524199.5377777, 0x11234567);
RunOneTruncationTest(-287524199.5377777, -0x11234567);
RunOneTruncationTest(2300193596.302222, -1994773700);
RunOneTruncationTest(-2300193596.302222, 1994773700);
RunOneTruncationTest(4600387192.604444, 305419896);
RunOneTruncationTest(-4600387192.604444, -305419896);
RunOneTruncationTest(4823855600872397.0, 1737075661);
RunOneTruncationTest(-4823855600872397.0, -1737075661);
RunOneTruncationTest(4503603922337791.0, -1);
RunOneTruncationTest(-4503603922337791.0, 1);
RunOneTruncationTest(4503601774854143.0, 2147483647);
RunOneTruncationTest(-4503601774854143.0, -2147483647);
RunOneTruncationTest(9007207844675582.0, -2);
RunOneTruncationTest(-9007207844675582.0, 2);
RunOneTruncationTest(2.4178527921507624e+24, -536870912);
RunOneTruncationTest(-2.4178527921507624e+24, 536870912);
RunOneTruncationTest(2.417853945072267e+24, -536870912);
RunOneTruncationTest(-2.417853945072267e+24, 536870912);
RunOneTruncationTest(4.8357055843015248e+24, -1073741824);
RunOneTruncationTest(-4.8357055843015248e+24, 1073741824);
RunOneTruncationTest(4.8357078901445341e+24, -1073741824);
RunOneTruncationTest(-4.8357078901445341e+24, 1073741824);
RunOneTruncationTest(2147483647.0, 2147483647);
RunOneTruncationTest(-2147483648.0, -2147483647-1);
RunOneTruncationTest(9.6714111686030497e+24, -2147483647-1);
RunOneTruncationTest(-9.6714111686030497e+24, -2147483647-1);
RunOneTruncationTest(9.6714157802890681e+24, -2147483647-1);
RunOneTruncationTest(-9.6714157802890681e+24, -2147483647-1);
RunOneTruncationTest(1.9342813113834065e+25, -2147483647-1);
RunOneTruncationTest(-1.9342813113834065e+25, -2147483647-1);
RunOneTruncationTest(3.868562622766813e+25, 0);
RunOneTruncationTest(-3.868562622766813e+25, 0);
RunOneTruncationTest(1.7976931348623157e+308, 0);
RunOneTruncationTest(-1.7976931348623157e+308, 0);
}
#undef NaN
#undef Infinity
#undef RunOneTruncationTest
TEST(CodeStubMajorKeys) {
CcTest::InitializeVM();
LocalContext context;
Isolate* isolate = CcTest::i_isolate();
#define CHECK_STUB(NAME) \
{ \
HandleScope scope(isolate); \
NAME##Stub stub_impl(0xABCD, isolate); \
CodeStub* stub = &stub_impl; \
CHECK_EQ(stub->MajorKey(), CodeStub::NAME); \
}
CODE_STUB_LIST(CHECK_STUB);
}
} // namespace internal
} // namespace v8
|
