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Issue 341123003: ARM64: Faster immediate check and fix corner cases (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Address Ulan's comments Created 6 years, 5 months ago
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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 // 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_ARM64_UTILS_ARM64_H_ 5 #ifndef V8_ARM64_UTILS_ARM64_H_
6 #define V8_ARM64_UTILS_ARM64_H_ 6 #define V8_ARM64_UTILS_ARM64_H_
7 7
8 #include <cmath> 8 #include <cmath>
9 #include "src/v8.h" 9 #include "src/v8.h"
10 10
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50 memcpy(&value, &bits, 8); 50 memcpy(&value, &bits, 8);
51 return value; 51 return value;
52 } 52 }
53 53
54 54
55 // Bit counting. 55 // Bit counting.
56 int CountLeadingZeros(uint64_t value, int width); 56 int CountLeadingZeros(uint64_t value, int width);
57 int CountLeadingSignBits(int64_t value, int width); 57 int CountLeadingSignBits(int64_t value, int width);
58 int CountTrailingZeros(uint64_t value, int width); 58 int CountTrailingZeros(uint64_t value, int width);
59 int CountSetBits(uint64_t value, int width); 59 int CountSetBits(uint64_t value, int width);
60 uint64_t LargestPowerOf2Divisor(uint64_t value);
60 int MaskToBit(uint64_t mask); 61 int MaskToBit(uint64_t mask);
61 62
62 63
63 // NaN tests. 64 // NaN tests.
64 inline bool IsSignallingNaN(double num) { 65 inline bool IsSignallingNaN(double num) {
65 uint64_t raw = double_to_rawbits(num); 66 uint64_t raw = double_to_rawbits(num);
66 if (std::isnan(num) && ((raw & kDQuietNanMask) == 0)) { 67 if (std::isnan(num) && ((raw & kDQuietNanMask) == 0)) {
67 return true; 68 return true;
68 } 69 }
69 return false; 70 return false;
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104 } 105 }
105 106
106 107
107 inline float FusedMultiplyAdd(float op1, float op2, float a) { 108 inline float FusedMultiplyAdd(float op1, float op2, float a) {
108 return fmaf(op1, op2, a); 109 return fmaf(op1, op2, a);
109 } 110 }
110 111
111 } } // namespace v8::internal 112 } } // namespace v8::internal
112 113
113 #endif // V8_ARM64_UTILS_ARM64_H_ 114 #endif // V8_ARM64_UTILS_ARM64_H_
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