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Moved down to a single divide.

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This commit is contained in:
Thomas Harte 2016-07-14 19:45:08 -04:00
parent 481475a0f4
commit 6b4fec37ff
1 changed files with 1 additions and 6 deletions
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7
Storage/Disk/DigitalPhaseLockedLoop.cpp
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@ -69,12 +69,7 @@ void DigitalPhaseLockedLoop::add_pulse()
sum_x_squared += (float)x*x;
}
sum_xy /= (float)_length_of_history;
sum_x /= (float)_length_of_history;
sum_y /= (float)_length_of_history;
sum_x_squared /= (float)_length_of_history;
float gradient = (sum_xy - sum_x*sum_y) / (sum_x_squared - sum_x*sum_x);
float gradient = ((float)_length_of_history*sum_xy - sum_x*sum_y) / ((float)_length_of_history*sum_x_squared - sum_x*sum_x);
_current_window_length += (unsigned int)(gradient / 2.0);
if(_current_window_length < _clocks_per_bit - _tolerance) _current_window_length = _clocks_per_bit - _tolerance;
if(_current_window_length > _clocks_per_bit + _tolerance) _current_window_length = _clocks_per_bit + _tolerance;