Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(145)

Side by Side Diff: third_party/WebKit/Source/wtf/dtoa/diy-fp.h

Issue 1436153002: Apply clang-format with Chromium-style without column limit. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 1 month ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
OLDNEW
1 // Copyright 2010 the V8 project authors. All rights reserved. 1 // Copyright 2010 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
(...skipping 16 matching lines...) Expand all
27 27
28 #ifndef DOUBLE_CONVERSION_DIY_FP_H_ 28 #ifndef DOUBLE_CONVERSION_DIY_FP_H_
29 #define DOUBLE_CONVERSION_DIY_FP_H_ 29 #define DOUBLE_CONVERSION_DIY_FP_H_
30 30
31 #include "utils.h" 31 #include "utils.h"
32 32
33 namespace WTF { 33 namespace WTF {
34 34
35 namespace double_conversion { 35 namespace double_conversion {
36 36
37 // This "Do It Yourself Floating Point" class implements a floating-point nu mber 37 // This "Do It Yourself Floating Point" class implements a floating-point number
38 // with a uint64 significand and an int exponent. Normalized DiyFp numbers w ill 38 // with a uint64 significand and an int exponent. Normalized DiyFp numbers will
39 // have the most significant bit of the significand set. 39 // have the most significant bit of the significand set.
40 // Multiplication and Subtraction do not normalize their results. 40 // Multiplication and Subtraction do not normalize their results.
41 // DiyFp are not designed to contain special doubles (NaN and Infinity). 41 // DiyFp are not designed to contain special doubles (NaN and Infinity).
42 class DiyFp { 42 class DiyFp {
43 public: 43 public:
44 static const int kSignificandSize = 64; 44 static const int kSignificandSize = 64;
45 45
46 DiyFp() : f_(0), e_(0) {} 46 DiyFp()
47 DiyFp(uint64_t f, int e) : f_(f), e_(e) {} 47 : f_(0), e_(0) {}
48 DiyFp(uint64_t f, int e)
49 : f_(f), e_(e) {}
48 50
49 // this = this - other. 51 // this = this - other.
50 // The exponents of both numbers must be the same and the significand of this 52 // The exponents of both numbers must be the same and the significand of this
51 // must be bigger than the significand of other. 53 // must be bigger than the significand of other.
52 // The result will not be normalized. 54 // The result will not be normalized.
53 void Subtract(const DiyFp& other) { 55 void Subtract(const DiyFp& other) {
54 ASSERT(e_ == other.e_); 56 ASSERT(e_ == other.e_);
55 ASSERT(f_ >= other.f_); 57 ASSERT(f_ >= other.f_);
56 f_ -= other.f_; 58 f_ -= other.f_;
57 } 59 }
58 60
59 // Returns a - b. 61 // Returns a - b.
60 // The exponents of both numbers must be the same and this must be bigge r 62 // The exponents of both numbers must be the same and this must be bigger
61 // than other. The result will not be normalized. 63 // than other. The result will not be normalized.
62 static DiyFp Minus(const DiyFp& a, const DiyFp& b) { 64 static DiyFp Minus(const DiyFp& a, const DiyFp& b) {
63 DiyFp result = a; 65 DiyFp result = a;
64 result.Subtract(b); 66 result.Subtract(b);
65 return result; 67 return result;
66 } 68 }
67 69
70 // this = this * other.
71 void Multiply(const DiyFp& other);
68 72
69 // this = this * other. 73 // returns a * b;
70 void Multiply(const DiyFp& other); 74 static DiyFp Times(const DiyFp& a, const DiyFp& b) {
75 DiyFp result = a;
76 result.Multiply(b);
77 return result;
78 }
71 79
72 // returns a * b; 80 void Normalize() {
73 static DiyFp Times(const DiyFp& a, const DiyFp& b) { 81 ASSERT(f_ != 0);
74 DiyFp result = a; 82 uint64_t f = f_;
75 result.Multiply(b); 83 int e = e_;
76 return result;
77 }
78 84
79 void Normalize() { 85 // This method is mainly called for normalizing boundaries. In general
80 ASSERT(f_ != 0); 86 // boundaries need to be shifted by 10 bits. We thus optimize for this case.
81 uint64_t f = f_; 87 const uint64_t k10MSBits = UINT64_2PART_C(0xFFC00000, 00000000);
82 int e = e_; 88 while ((f & k10MSBits) == 0) {
89 f <<= 10;
90 e -= 10;
91 }
92 while ((f & kUint64MSB) == 0) {
93 f <<= 1;
94 e--;
95 }
96 f_ = f;
97 e_ = e;
98 }
83 99
84 // This method is mainly called for normalizing boundaries. In gener al 100 static DiyFp Normalize(const DiyFp& a) {
85 // boundaries need to be shifted by 10 bits. We thus optimize for th is case. 101 DiyFp result = a;
86 const uint64_t k10MSBits = UINT64_2PART_C(0xFFC00000, 00000000); 102 result.Normalize();
87 while ((f & k10MSBits) == 0) { 103 return result;
88 f <<= 10; 104 }
89 e -= 10;
90 }
91 while ((f & kUint64MSB) == 0) {
92 f <<= 1;
93 e--;
94 }
95 f_ = f;
96 e_ = e;
97 }
98 105
99 static DiyFp Normalize(const DiyFp& a) { 106 uint64_t f() const { return f_; }
100 DiyFp result = a; 107 int e() const { return e_; }
101 result.Normalize();
102 return result;
103 }
104 108
105 uint64_t f() const { return f_; } 109 void set_f(uint64_t new_value) { f_ = new_value; }
106 int e() const { return e_; } 110 void set_e(int new_value) { e_ = new_value; }
107 111
108 void set_f(uint64_t new_value) { f_ = new_value; } 112 private:
109 void set_e(int new_value) { e_ = new_value; } 113 static const uint64_t kUint64MSB = UINT64_2PART_C(0x80000000, 00000000);
110 114
111 private: 115 uint64_t f_;
112 static const uint64_t kUint64MSB = UINT64_2PART_C(0x80000000, 00000000); 116 int e_;
113 117 };
114 uint64_t f_;
115 int e_;
116 };
117 118
118 } // namespace double_conversion 119 } // namespace double_conversion
119 120
120 } // namespace WTF 121 } // namespace WTF
121 122
122 #endif // DOUBLE_CONVERSION_DIY_FP_H_ 123 #endif // DOUBLE_CONVERSION_DIY_FP_H_
OLDNEW
« no previous file with comments | « third_party/WebKit/Source/wtf/dtoa/cached-powers.h ('k') | third_party/WebKit/Source/wtf/dtoa/double.h » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698