return int64_t(X << (64 - B)) >> (64 - B);
}
-/// \brief Add two unsigned integers, X and Y, of type T.
-/// Clamp the result to the maximum representable value of T on overflow.
-template <typename T>
-typename std::enable_if<std::is_unsigned<T>::value, T>::type
-SaturatingAdd(T X, T Y) {
- // Hacker's Delight, p. 29
- T Z = X + Y;
- if (Z < X || Z < Y)
- return std::numeric_limits<T>::max();
- else
- return Z;
-}
-
-/// \brief Multiply two unsigned integers, X and Y, of type T.
-/// Clamp the result to the maximum representable value of T on overflow.
-template <typename T>
-typename std::enable_if<std::is_unsigned<T>::value, T>::type
-SaturatingMultiply(T X, T Y) {
- // Hacker's Delight, p. 30
- T Z = X * Y;
- if (Y != 0 && Z / Y != X)
- return std::numeric_limits<T>::max();
- else
- return Z;
-}
-
extern const float huge_valf;
} // End llvm namespace