Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(462)

Side by Side Diff: src/double.h

Issue 430503007: Rename ASSERT* to DCHECK*. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: REBASE and fixes Created 6 years, 4 months 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 | Annotate | Revision Log
« no previous file with comments | « src/diy-fp.h ('k') | src/dtoa.cc » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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_DOUBLE_H_ 5 #ifndef V8_DOUBLE_H_
6 #define V8_DOUBLE_H_ 6 #define V8_DOUBLE_H_
7 7
8 #include "src/diy-fp.h" 8 #include "src/diy-fp.h"
9 9
10 namespace v8 { 10 namespace v8 {
(...skipping 16 matching lines...) Expand all
27 27
28 Double() : d64_(0) {} 28 Double() : d64_(0) {}
29 explicit Double(double d) : d64_(double_to_uint64(d)) {} 29 explicit Double(double d) : d64_(double_to_uint64(d)) {}
30 explicit Double(uint64_t d64) : d64_(d64) {} 30 explicit Double(uint64_t d64) : d64_(d64) {}
31 explicit Double(DiyFp diy_fp) 31 explicit Double(DiyFp diy_fp)
32 : d64_(DiyFpToUint64(diy_fp)) {} 32 : d64_(DiyFpToUint64(diy_fp)) {}
33 33
34 // The value encoded by this Double must be greater or equal to +0.0. 34 // The value encoded by this Double must be greater or equal to +0.0.
35 // It must not be special (infinity, or NaN). 35 // It must not be special (infinity, or NaN).
36 DiyFp AsDiyFp() const { 36 DiyFp AsDiyFp() const {
37 ASSERT(Sign() > 0); 37 DCHECK(Sign() > 0);
38 ASSERT(!IsSpecial()); 38 DCHECK(!IsSpecial());
39 return DiyFp(Significand(), Exponent()); 39 return DiyFp(Significand(), Exponent());
40 } 40 }
41 41
42 // The value encoded by this Double must be strictly greater than 0. 42 // The value encoded by this Double must be strictly greater than 0.
43 DiyFp AsNormalizedDiyFp() const { 43 DiyFp AsNormalizedDiyFp() const {
44 ASSERT(value() > 0.0); 44 DCHECK(value() > 0.0);
45 uint64_t f = Significand(); 45 uint64_t f = Significand();
46 int e = Exponent(); 46 int e = Exponent();
47 47
48 // The current double could be a denormal. 48 // The current double could be a denormal.
49 while ((f & kHiddenBit) == 0) { 49 while ((f & kHiddenBit) == 0) {
50 f <<= 1; 50 f <<= 1;
51 e--; 51 e--;
52 } 52 }
53 // Do the final shifts in one go. 53 // Do the final shifts in one go.
54 f <<= DiyFp::kSignificandSize - kSignificandSize; 54 f <<= DiyFp::kSignificandSize - kSignificandSize;
(...skipping 59 matching lines...) Expand 10 before | Expand all | Expand 10 after
114 } 114 }
115 115
116 int Sign() const { 116 int Sign() const {
117 uint64_t d64 = AsUint64(); 117 uint64_t d64 = AsUint64();
118 return (d64 & kSignMask) == 0? 1: -1; 118 return (d64 & kSignMask) == 0? 1: -1;
119 } 119 }
120 120
121 // Precondition: the value encoded by this Double must be greater or equal 121 // Precondition: the value encoded by this Double must be greater or equal
122 // than +0.0. 122 // than +0.0.
123 DiyFp UpperBoundary() const { 123 DiyFp UpperBoundary() const {
124 ASSERT(Sign() > 0); 124 DCHECK(Sign() > 0);
125 return DiyFp(Significand() * 2 + 1, Exponent() - 1); 125 return DiyFp(Significand() * 2 + 1, Exponent() - 1);
126 } 126 }
127 127
128 // Returns the two boundaries of this. 128 // Returns the two boundaries of this.
129 // The bigger boundary (m_plus) is normalized. The lower boundary has the same 129 // The bigger boundary (m_plus) is normalized. The lower boundary has the same
130 // exponent as m_plus. 130 // exponent as m_plus.
131 // Precondition: the value encoded by this Double must be greater than 0. 131 // Precondition: the value encoded by this Double must be greater than 0.
132 void NormalizedBoundaries(DiyFp* out_m_minus, DiyFp* out_m_plus) const { 132 void NormalizedBoundaries(DiyFp* out_m_minus, DiyFp* out_m_plus) const {
133 ASSERT(value() > 0.0); 133 DCHECK(value() > 0.0);
134 DiyFp v = this->AsDiyFp(); 134 DiyFp v = this->AsDiyFp();
135 bool significand_is_zero = (v.f() == kHiddenBit); 135 bool significand_is_zero = (v.f() == kHiddenBit);
136 DiyFp m_plus = DiyFp::Normalize(DiyFp((v.f() << 1) + 1, v.e() - 1)); 136 DiyFp m_plus = DiyFp::Normalize(DiyFp((v.f() << 1) + 1, v.e() - 1));
137 DiyFp m_minus; 137 DiyFp m_minus;
138 if (significand_is_zero && v.e() != kDenormalExponent) { 138 if (significand_is_zero && v.e() != kDenormalExponent) {
139 // The boundary is closer. Think of v = 1000e10 and v- = 9999e9. 139 // The boundary is closer. Think of v = 1000e10 and v- = 9999e9.
140 // Then the boundary (== (v - v-)/2) is not just at a distance of 1e9 but 140 // Then the boundary (== (v - v-)/2) is not just at a distance of 1e9 but
141 // at a distance of 1e8. 141 // at a distance of 1e8.
142 // The only exception is for the smallest normal: the largest denormal is 142 // The only exception is for the smallest normal: the largest denormal is
143 // at the same distance as its successor. 143 // at the same distance as its successor.
(...skipping 56 matching lines...) Expand 10 before | Expand all | Expand 10 after
200 biased_exponent = static_cast<uint64_t>(exponent + kExponentBias); 200 biased_exponent = static_cast<uint64_t>(exponent + kExponentBias);
201 } 201 }
202 return (significand & kSignificandMask) | 202 return (significand & kSignificandMask) |
203 (biased_exponent << kPhysicalSignificandSize); 203 (biased_exponent << kPhysicalSignificandSize);
204 } 204 }
205 }; 205 };
206 206
207 } } // namespace v8::internal 207 } } // namespace v8::internal
208 208
209 #endif // V8_DOUBLE_H_ 209 #endif // V8_DOUBLE_H_
OLDNEW
« no previous file with comments | « src/diy-fp.h ('k') | src/dtoa.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698