// Denominator
uint32_t D;
- int64_t compare(BranchProbability RHS) const {
- return (uint64_t)N * RHS.D - (uint64_t)D * RHS.N;
- }
-
public:
BranchProbability(uint32_t n, uint32_t d) : N(n), D(d) {
assert(d > 0 && "Denomiator cannot be 0!");
uint32_t getDenominator() const { return D; }
// Return (1 - Probability).
- BranchProbability getCompl() {
+ BranchProbability getCompl() const {
return BranchProbability(D - N, D);
}
- void print(raw_ostream &OS) const;
+ raw_ostream &print(raw_ostream &OS) const;
void dump() const;
- bool operator==(BranchProbability RHS) const { return compare(RHS) == 0; }
- bool operator!=(BranchProbability RHS) const { return compare(RHS) != 0; }
- bool operator< (BranchProbability RHS) const { return compare(RHS) < 0; }
- bool operator> (BranchProbability RHS) const { return compare(RHS) > 0; }
- bool operator<=(BranchProbability RHS) const { return compare(RHS) <= 0; }
- bool operator>=(BranchProbability RHS) const { return compare(RHS) >= 0; }
+ /// \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);
+ }
+ bool operator<(BranchProbability RHS) const {
+ return (uint64_t)N * RHS.D < (uint64_t)D * RHS.N;
+ }
+ bool operator>(BranchProbability RHS) const { return RHS < *this; }
+ bool operator<=(BranchProbability RHS) const { return !(RHS < *this); }
+ 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);
+}
}