public:
BranchProbability(uint32_t n, uint32_t d) : N(n), D(d) {
- assert(d > 0 && "Denomiator cannot be 0!");
+ assert(d > 0 && "Denominator cannot be 0!");
assert(n <= d && "Probability cannot be bigger than 1!");
}
return BranchProbability(D - N, D);
}
- void print(raw_ostream &OS) const;
+ raw_ostream &print(raw_ostream &OS) const;
void dump() const;
+ /// \brief Scale a large integer.
+ ///
+ /// Scales \c Num. Guarantees full precision. Returns the floor of the
+ /// result.
+ ///
+ /// \return \c Num times \c this.
+ uint64_t scale(uint64_t Num) const;
+
+ /// \brief Scale a large integer by the inverse.
+ ///
+ /// Scales \c Num by the inverse of \c this. Guarantees full precision.
+ /// Returns the floor of the result.
+ ///
+ /// \return \c Num divided by \c this.
+ uint64_t scaleByInverse(uint64_t Num) const;
+
bool operator==(BranchProbability RHS) const {
return (uint64_t)N * RHS.D == (uint64_t)D * RHS.N;
}
bool operator>=(BranchProbability RHS) const { return !(*this < RHS); }
};
-raw_ostream &operator<<(raw_ostream &OS, const BranchProbability &Prob);
+inline raw_ostream &operator<<(raw_ostream &OS, const BranchProbability &Prob) {
+ return Prob.print(OS);
+}
}