10 // This file implements Block Frequency class.
21   Frequency = Prob.scale(Frequency);  in operator *=()
26   BlockFrequency Freq(Frequency);  in operator *()
32   Frequency = Prob.scaleByInverse(Frequency);  in operator /=()
37   BlockFrequency Freq(Frequency);  in operator /()
43   uint64_t Before = Freq.Frequency;  in operator +=()
44   Frequency += Freq.Frequency;  in operator +=()
46   // If overflow, set frequency to the maximum value.  in operator +=()
47   if (Frequency < Before)  in operator +=()
48     Frequency = UINT64_MAX;  in operator +=()
54   BlockFrequency NewFreq(Frequency);  in operator +()
60   // If underflow, set frequency to 0.  in operator -=()
61   if (Frequency <= Freq.Frequency)  in operator -=()
62     Frequency = 0;  in operator -=()
64     Frequency -= Freq.Frequency;  in operator -=()
69   BlockFrequency NewFreq(Frequency);  in operator -()
75   // Frequency can never be 0 by design.  in operator >>=()
76   assert(Frequency != 0);  in operator >>=()
79   Frequency >>= count;  in operator >>=()
82   Frequency |= Frequency == 0;  in operator >>=()