Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(153)

Unified Diff: src/diy_fp.h

Issue 1102002: Rename files containing underscores. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 9 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 side-by-side diff with in-line comments
Download patch
« no previous file with comments | « src/diy-fp.cc ('k') | src/diy_fp.cc » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: src/diy_fp.h
===================================================================
--- src/diy_fp.h (revision 4180)
+++ src/diy_fp.h (working copy)
@@ -1,117 +0,0 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_DIY_FP_H_
-#define V8_DIY_FP_H_
-
-namespace v8 {
-namespace internal {
-
-// This "Do It Yourself Floating Point" class implements a floating-point number
-// with a uint64 significand and an int exponent. Normalized DiyFp numbers will
-// have the most significant bit of the significand set.
-// Multiplication and Subtraction do not normalize their results.
-// DiyFp are not designed to contain special doubles (NaN and Infinity).
-class DiyFp {
- public:
- static const int kSignificandSize = 64;
-
- DiyFp() : f_(0), e_(0) {}
- DiyFp(uint64_t f, int e) : f_(f), e_(e) {}
-
- // this = this - other.
- // The exponents of both numbers must be the same and the significand of this
- // must be bigger than the significand of other.
- // The result will not be normalized.
- void Subtract(const DiyFp& other) {
- ASSERT(e_ == other.e_);
- ASSERT(f_ >= other.f_);
- f_ -= other.f_;
- }
-
- // Returns a - b.
- // The exponents of both numbers must be the same and this must be bigger
- // than other. The result will not be normalized.
- static DiyFp Minus(const DiyFp& a, const DiyFp& b) {
- DiyFp result = a;
- result.Subtract(b);
- return result;
- }
-
-
- // this = this * other.
- void Multiply(const DiyFp& other);
-
- // returns a * b;
- static DiyFp Times(const DiyFp& a, const DiyFp& b) {
- DiyFp result = a;
- result.Multiply(b);
- return result;
- }
-
- void Normalize() {
- ASSERT(f_ != 0);
- uint64_t f = f_;
- int e = e_;
-
- // This method is mainly called for normalizing boundaries. In general
- // boundaries need to be shifted by 10 bits. We thus optimize for this case.
- const uint64_t k10MSBits = V8_2PART_UINT64_C(0xFFC00000, 00000000);
- while ((f & k10MSBits) == 0) {
- f <<= 10;
- e -= 10;
- }
- while ((f & kUint64MSB) == 0) {
- f <<= 1;
- e--;
- }
- f_ = f;
- e_ = e;
- }
-
- static DiyFp Normalize(const DiyFp& a) {
- DiyFp result = a;
- result.Normalize();
- return result;
- }
-
- uint64_t f() const { return f_; }
- int e() const { return e_; }
-
- void set_f(uint64_t new_value) { f_ = new_value; }
- void set_e(int new_value) { e_ = new_value; }
-
- private:
- static const uint64_t kUint64MSB = V8_2PART_UINT64_C(0x80000000, 00000000);
-
- uint64_t f_;
- int e_;
-};
-
-} } // namespace v8::internal
-
-#endif // V8_DIY_FP_H_
« no previous file with comments | « src/diy-fp.cc ('k') | src/diy_fp.cc » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698