Reland "Turn libbase into a component"

src/base/division-by-constant.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_BASE_DIVISION_BY_CONSTANT_H_
 #define V8_BASE_DIVISION_BY_CONSTANT_H_
 
+#include <stdint.h>
+
+#include "src/base/base-export.h"
+
 namespace v8 {
 namespace base {
 
 // ----------------------------------------------------------------------------
 
 // The magic numbers for division via multiplication, see Warren's "Hacker's
 // Delight", chapter 10. The template parameter must be one of the unsigned
 // integral types.
 template <class T>
-struct MagicNumbersForDivision {
+struct V8_BASE_EXPORT MagicNumbersForDivision {
   MagicNumbersForDivision(T m, unsigned s, bool a)
       : multiplier(m), shift(s), add(a) {}
-  bool operator==(const MagicNumbersForDivision& rhs) const;
+  bool operator==(const MagicNumbersForDivision& rhs) const {
+    return multiplier == rhs.multiplier && shift == rhs.shift && add == rhs.add;
+  }
 
   T multiplier;
   unsigned shift;
   bool add;
 };
 
 
 // Calculate the multiplier and shift for signed division via multiplication.
 // The divisor must not be -1, 0 or 1 when interpreted as a signed value.
 template <class T>
-MagicNumbersForDivision<T> SignedDivisionByConstant(T d);
-
+V8_BASE_EXPORT MagicNumbersForDivision<T> SignedDivisionByConstant(T d);
 
 // Calculate the multiplier and shift for unsigned division via multiplication,
 // see Warren's "Hacker's Delight", chapter 10. The divisor must not be 0 and
 // leading_zeros can be used to speed up the calculation if the given number of
 // upper bits of the dividend value are known to be zero.
 template <class T>
-MagicNumbersForDivision<T> UnsignedDivisionByConstant(
+V8_BASE_EXPORT MagicNumbersForDivision<T> UnsignedDivisionByConstant(
     T d, unsigned leading_zeros = 0);
 
+template struct V8_BASE_EXPORT MagicNumbersForDivision<uint32_t>;
+template struct V8_BASE_EXPORT MagicNumbersForDivision<uint64_t>;
+
+extern template V8_BASE_EXPORT MagicNumbersForDivision<uint32_t>
+SignedDivisionByConstant(uint32_t d);
+extern template V8_BASE_EXPORT MagicNumbersForDivision<uint64_t>
+SignedDivisionByConstant(uint64_t d);
+
+extern template V8_BASE_EXPORT MagicNumbersForDivision<uint32_t>
+UnsignedDivisionByConstant(uint32_t d, unsigned leading_zeros);
+extern template V8_BASE_EXPORT MagicNumbersForDivision<uint64_t>
+UnsignedDivisionByConstant(uint64_t d, unsigned leading_zeros);
+
 }  // namespace base
 }  // namespace v8
 
 #endif  // V8_BASE_DIVISION_BY_CONSTANT_H_