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Issue 1250733005: SIMD.js Add the other SIMD Phase 1 types. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Don't run downloaded SIMD value type tests. Created 5 years, 4 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8_UTILS_H_ 5 #ifndef V8_UTILS_H_
6 #define V8_UTILS_H_ 6 #define V8_UTILS_H_
7 7
8 #include <limits.h> 8 #include <limits.h>
9 #include <stdlib.h> 9 #include <stdlib.h>
10 #include <string.h> 10 #include <string.h>
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193 193
194 194
195 // Floor(-0.0) == 0.0 195 // Floor(-0.0) == 0.0
196 inline double Floor(double x) { 196 inline double Floor(double x) {
197 #if V8_CC_MSVC 197 #if V8_CC_MSVC
198 if (x == 0) return x; // Fix for issue 3477. 198 if (x == 0) return x; // Fix for issue 3477.
199 #endif 199 #endif
200 return std::floor(x); 200 return std::floor(x);
201 } 201 }
202 202
203 // Implements the ES5 SameValue operation for floating point types.
204 // http://www.ecma-international.org/ecma-262/6.0/#sec-samevalue
205 template <typename T>
206 bool SameValue(T x, T y) {
207 // SameValue(NaN, NaN) is true.
208 if (x != y) return std::isnan(x) && std::isnan(y);
209 // SameValue(0, -0) is false.
210 if (std::signbit(x) != std::signbit(y)) return false;
211 return true;
212 }
213
214
215 // Implements the ES6 SameValueZero operation for floating point types.
216 // http://www.ecma-international.org/ecma-262/6.0/#sec-samevaluezero
217 template <typename T>
218 bool SameValueZero(T x, T y) {
219 if (x != y) return std::isnan(x) && std::isnan(y);
220 // SameValueZero doesn't distinguish between 0 and -0.
221 return true;
222 }
223
224 203
225 // TODO(svenpanne) Clean up the whole power-of-2 mess. 204 // TODO(svenpanne) Clean up the whole power-of-2 mess.
226 inline int32_t WhichPowerOf2Abs(int32_t x) { 205 inline int32_t WhichPowerOf2Abs(int32_t x) {
227 return (x == kMinInt) ? 31 : WhichPowerOf2(Abs(x)); 206 return (x == kMinInt) ? 31 : WhichPowerOf2(Abs(x));
228 } 207 }
229 208
230 209
231 // Obtains the unsigned type corresponding to T 210 // Obtains the unsigned type corresponding to T
232 // available in C++11 as std::make_unsigned 211 // available in C++11 as std::make_unsigned
233 template<typename T> 212 template<typename T>
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1769 uint32_t* ptr = reinterpret_cast<uint32_t*>(p); 1748 uint32_t* ptr = reinterpret_cast<uint32_t*>(p);
1770 *ptr = c.u[0]; 1749 *ptr = c.u[0];
1771 *(ptr + 1) = c.u[1]; 1750 *(ptr + 1) = c.u[1];
1772 #endif // V8_TARGET_ARCH_MIPS 1751 #endif // V8_TARGET_ARCH_MIPS
1773 } 1752 }
1774 1753
1775 } // namespace internal 1754 } // namespace internal
1776 } // namespace v8 1755 } // namespace v8
1777 1756
1778 #endif // V8_UTILS_H_ 1757 #endif // V8_UTILS_H_
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