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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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42 | 42 |
43 | 43 |
44 int STDCALL ConvertDToICVersion(double d) { | 44 int STDCALL ConvertDToICVersion(double d) { |
45 union { double d; uint32_t u[2]; } dbl; | 45 union { double d; uint32_t u[2]; } dbl; |
46 dbl.d = d; | 46 dbl.d = d; |
47 uint32_t exponent_bits = dbl.u[1]; | 47 uint32_t exponent_bits = dbl.u[1]; |
48 int32_t shifted_mask = static_cast<int32_t>(Double::kExponentMask >> 32); | 48 int32_t shifted_mask = static_cast<int32_t>(Double::kExponentMask >> 32); |
49 int32_t exponent = (((exponent_bits & shifted_mask) >> | 49 int32_t exponent = (((exponent_bits & shifted_mask) >> |
50 (Double::kPhysicalSignificandSize - 32)) - | 50 (Double::kPhysicalSignificandSize - 32)) - |
51 HeapNumber::kExponentBias); | 51 HeapNumber::kExponentBias); |
| 52 if (exponent < 0) { |
| 53 return 0; |
| 54 } |
52 uint32_t unsigned_exponent = static_cast<uint32_t>(exponent); | 55 uint32_t unsigned_exponent = static_cast<uint32_t>(exponent); |
53 int result = 0; | 56 int result = 0; |
54 uint32_t max_exponent = | 57 uint32_t max_exponent = |
55 static_cast<uint32_t>(Double::kPhysicalSignificandSize); | 58 static_cast<uint32_t>(Double::kPhysicalSignificandSize); |
56 if (unsigned_exponent >= max_exponent) { | 59 if (unsigned_exponent >= max_exponent) { |
57 if ((exponent - Double::kPhysicalSignificandSize) < 32) { | 60 if ((exponent - Double::kPhysicalSignificandSize) < 32) { |
58 result = dbl.u[0] << (exponent - Double::kPhysicalSignificandSize); | 61 result = dbl.u[0] << (exponent - Double::kPhysicalSignificandSize); |
59 } | 62 } |
60 } else { | 63 } else { |
61 uint64_t big_result = | 64 uint64_t big_result = |
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106 RunOneTruncationTest(0.5, 0); | 109 RunOneTruncationTest(0.5, 0); |
107 RunOneTruncationTest(-0.5, 0); | 110 RunOneTruncationTest(-0.5, 0); |
108 RunOneTruncationTest(1.5, 1); | 111 RunOneTruncationTest(1.5, 1); |
109 RunOneTruncationTest(-1.5, -1); | 112 RunOneTruncationTest(-1.5, -1); |
110 RunOneTruncationTest(5.5, 5); | 113 RunOneTruncationTest(5.5, 5); |
111 RunOneTruncationTest(-5.0, -5); | 114 RunOneTruncationTest(-5.0, -5); |
112 RunOneTruncationTest(NaN, 0); | 115 RunOneTruncationTest(NaN, 0); |
113 RunOneTruncationTest(Infinity, 0); | 116 RunOneTruncationTest(Infinity, 0); |
114 RunOneTruncationTest(-NaN, 0); | 117 RunOneTruncationTest(-NaN, 0); |
115 RunOneTruncationTest(-Infinity, 0); | 118 RunOneTruncationTest(-Infinity, 0); |
| 119 RunOneTruncationTest(4.94065645841e-324, 0); |
| 120 RunOneTruncationTest(-4.94065645841e-324, 0); |
116 | 121 |
117 RunOneTruncationTest(4.5036e+15, 0x1635E000); | 122 RunOneTruncationTest(0.9999999999999999, 0); |
| 123 RunOneTruncationTest(-0.9999999999999999, 0); |
| 124 RunOneTruncationTest(4294967296.0, 0); |
| 125 RunOneTruncationTest(-4294967296.0, 0); |
| 126 RunOneTruncationTest(9223372036854775000.0, 4294966272.0); |
| 127 RunOneTruncationTest(-9223372036854775000.0, -4294966272.0); |
| 128 RunOneTruncationTest(4.5036e+15, 372629504); |
118 RunOneTruncationTest(-4.5036e+15, -372629504); | 129 RunOneTruncationTest(-4.5036e+15, -372629504); |
119 | 130 |
| 131 RunOneTruncationTest(287524199.5377777, 0x11234567); |
| 132 RunOneTruncationTest(-287524199.5377777, -0x11234567); |
| 133 RunOneTruncationTest(2300193596.302222, 2300193596.0); |
| 134 RunOneTruncationTest(-2300193596.302222, -2300193596.0); |
| 135 RunOneTruncationTest(4600387192.604444, 305419896); |
| 136 RunOneTruncationTest(-4600387192.604444, -305419896); |
| 137 RunOneTruncationTest(4823855600872397.0, 1737075661); |
| 138 RunOneTruncationTest(-4823855600872397.0, -1737075661); |
| 139 |
120 RunOneTruncationTest(4503603922337791.0, -1); | 140 RunOneTruncationTest(4503603922337791.0, -1); |
121 RunOneTruncationTest(-4503603922337791.0, 1); | 141 RunOneTruncationTest(-4503603922337791.0, 1); |
122 RunOneTruncationTest(4503601774854143.0, 2147483647); | 142 RunOneTruncationTest(4503601774854143.0, 2147483647); |
123 RunOneTruncationTest(-4503601774854143.0, -2147483647); | 143 RunOneTruncationTest(-4503601774854143.0, -2147483647); |
124 RunOneTruncationTest(9007207844675582.0, -2); | 144 RunOneTruncationTest(9007207844675582.0, -2); |
125 RunOneTruncationTest(-9007207844675582.0, 2); | 145 RunOneTruncationTest(-9007207844675582.0, 2); |
126 | 146 |
127 RunOneTruncationTest(2.4178527921507624e+24, -536870912); | 147 RunOneTruncationTest(2.4178527921507624e+24, -536870912); |
128 RunOneTruncationTest(-2.4178527921507624e+24, 536870912); | 148 RunOneTruncationTest(-2.4178527921507624e+24, 536870912); |
129 RunOneTruncationTest(2.417853945072267e+24, -536870912); | 149 RunOneTruncationTest(2.417853945072267e+24, -536870912); |
130 RunOneTruncationTest(-2.417853945072267e+24, 536870912); | 150 RunOneTruncationTest(-2.417853945072267e+24, 536870912); |
131 | 151 |
132 RunOneTruncationTest(4.8357055843015248e+24, -1073741824); | 152 RunOneTruncationTest(4.8357055843015248e+24, -1073741824); |
133 RunOneTruncationTest(-4.8357055843015248e+24, 1073741824); | 153 RunOneTruncationTest(-4.8357055843015248e+24, 1073741824); |
134 RunOneTruncationTest(4.8357078901445341e+24, -1073741824); | 154 RunOneTruncationTest(4.8357078901445341e+24, -1073741824); |
135 RunOneTruncationTest(-4.8357078901445341e+24, 1073741824); | 155 RunOneTruncationTest(-4.8357078901445341e+24, 1073741824); |
136 | 156 |
| 157 RunOneTruncationTest(2147483647.0, 2147483647.0); |
| 158 RunOneTruncationTest(-2147483648.0, -2147483648.0); |
137 RunOneTruncationTest(9.6714111686030497e+24, -2147483648.0); | 159 RunOneTruncationTest(9.6714111686030497e+24, -2147483648.0); |
138 RunOneTruncationTest(-9.6714111686030497e+24, -2147483648.0); | 160 RunOneTruncationTest(-9.6714111686030497e+24, -2147483648.0); |
139 RunOneTruncationTest(9.6714157802890681e+24, -2147483648.0); | 161 RunOneTruncationTest(9.6714157802890681e+24, -2147483648.0); |
140 RunOneTruncationTest(-9.6714157802890681e+24, -2147483648.0); | 162 RunOneTruncationTest(-9.6714157802890681e+24, -2147483648.0); |
| 163 RunOneTruncationTest(1.9342813113834065e+25, 2147483648.0); |
| 164 RunOneTruncationTest(-1.9342813113834065e+25, 2147483648.0); |
| 165 |
| 166 RunOneTruncationTest(3.868562622766813e+25, 0); |
| 167 RunOneTruncationTest(-3.868562622766813e+25, 0); |
| 168 RunOneTruncationTest(1.7976931348623157e+308, 0); |
| 169 RunOneTruncationTest(-1.7976931348623157e+308, 0); |
141 } | 170 } |
142 | 171 |
143 #undef NaN | 172 #undef NaN |
144 #undef Infinity | 173 #undef Infinity |
145 #undef RunOneTruncationTest | 174 #undef RunOneTruncationTest |
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