1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #include <stdlib.h> 29 30 #include <limits> 31 32 #include "src/v8.h" 33 34 #include "src/code-stubs.h" 35 #include "src/factory.h" 36 #include "src/macro-assembler.h" 37 #include "src/platform.h" 38 #include "test/cctest/cctest.h" 39 #include "test/cctest/test-code-stubs.h" 40 41 using namespace v8::internal; 42 43 44 int STDCALL ConvertDToICVersion(double d) { 45 union { double d; uint32_t u[2]; } dbl; 46 dbl.d = d; 47 uint32_t exponent_bits = dbl.u[1]; 48 int32_t shifted_mask = static_cast<int32_t>(Double::kExponentMask >> 32); 49 int32_t exponent = (((exponent_bits & shifted_mask) >> 50 (Double::kPhysicalSignificandSize - 32)) - 51 HeapNumber::kExponentBias); 52 if (exponent < 0) { 53 return 0; 54 } 55 uint32_t unsigned_exponent = static_cast<uint32_t>(exponent); 56 int result = 0; 57 uint32_t max_exponent = 58 static_cast<uint32_t>(Double::kPhysicalSignificandSize); 59 if (unsigned_exponent >= max_exponent) { 60 if ((exponent - Double::kPhysicalSignificandSize) < 32) { 61 result = dbl.u[0] << (exponent - Double::kPhysicalSignificandSize); 62 } 63 } else { 64 uint64_t big_result = 65 (BitCast<uint64_t>(d) & Double::kSignificandMask) | Double::kHiddenBit; 66 big_result = big_result >> (Double::kPhysicalSignificandSize - exponent); 67 result = static_cast<uint32_t>(big_result); 68 } 69 if (static_cast<int32_t>(exponent_bits) < 0) { 70 return (0 - result); 71 } else { 72 return result; 73 } 74 } 75 76 77 void RunOneTruncationTestWithTest(ConvertDToICallWrapper callWrapper, 78 ConvertDToIFunc func, 79 double from, 80 double raw) { 81 uint64_t to = static_cast<int64_t>(raw); 82 int result = (*callWrapper)(func, from); 83 CHECK_EQ(static_cast<int>(to), result); 84 } 85 86 87 int32_t DefaultCallWrapper(ConvertDToIFunc func, 88 double from) { 89 return (*func)(from); 90 } 91 92 93 // #define NaN and Infinity so that it's possible to cut-and-paste these tests 94 // directly to a .js file and run them. 95 #define NaN (OS::nan_value()) 96 #define Infinity (std::numeric_limits<double>::infinity()) 97 #define RunOneTruncationTest(p1, p2) \ 98 RunOneTruncationTestWithTest(callWrapper, func, p1, p2) 99 100 101 void RunAllTruncationTests(ConvertDToIFunc func) { 102 RunAllTruncationTests(DefaultCallWrapper, func); 103 } 104 105 106 void RunAllTruncationTests(ConvertDToICallWrapper callWrapper, 107 ConvertDToIFunc func) { 108 RunOneTruncationTest(0, 0); 109 RunOneTruncationTest(0.5, 0); 110 RunOneTruncationTest(-0.5, 0); 111 RunOneTruncationTest(1.5, 1); 112 RunOneTruncationTest(-1.5, -1); 113 RunOneTruncationTest(5.5, 5); 114 RunOneTruncationTest(-5.0, -5); 115 RunOneTruncationTest(NaN, 0); 116 RunOneTruncationTest(Infinity, 0); 117 RunOneTruncationTest(-NaN, 0); 118 RunOneTruncationTest(-Infinity, 0); 119 RunOneTruncationTest(4.94065645841e-324, 0); 120 RunOneTruncationTest(-4.94065645841e-324, 0); 121 122 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); 129 RunOneTruncationTest(-4.5036e+15, -372629504); 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); 139 140 RunOneTruncationTest(4503603922337791.0, -1); 141 RunOneTruncationTest(-4503603922337791.0, 1); 142 RunOneTruncationTest(4503601774854143.0, 2147483647); 143 RunOneTruncationTest(-4503601774854143.0, -2147483647); 144 RunOneTruncationTest(9007207844675582.0, -2); 145 RunOneTruncationTest(-9007207844675582.0, 2); 146 147 RunOneTruncationTest(2.4178527921507624e+24, -536870912); 148 RunOneTruncationTest(-2.4178527921507624e+24, 536870912); 149 RunOneTruncationTest(2.417853945072267e+24, -536870912); 150 RunOneTruncationTest(-2.417853945072267e+24, 536870912); 151 152 RunOneTruncationTest(4.8357055843015248e+24, -1073741824); 153 RunOneTruncationTest(-4.8357055843015248e+24, 1073741824); 154 RunOneTruncationTest(4.8357078901445341e+24, -1073741824); 155 RunOneTruncationTest(-4.8357078901445341e+24, 1073741824); 156 157 RunOneTruncationTest(2147483647.0, 2147483647.0); 158 RunOneTruncationTest(-2147483648.0, -2147483648.0); 159 RunOneTruncationTest(9.6714111686030497e+24, -2147483648.0); 160 RunOneTruncationTest(-9.6714111686030497e+24, -2147483648.0); 161 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); 170 } 171 172 #undef NaN 173 #undef Infinity 174 #undef RunOneTruncationTest 175
