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* predict.c (propagate_freq): More elegant sreal API is used. (estimate_bb_frequencies): Precomputed constants replaced by integer constants. * sreal.c (sreal::normalize): New function. (sreal::to_int): Likewise. (sreal::operator+): Likewise. (sreal::operator-): Likewise. (sreal::signedless_plus): Likewise. (sreal::signedless_minus): Likewise. (sreal::operator/): Negative number support is added. * sreal.h: Definition of new functions added. (inline sreal operator<<): New function. (inline sreal operator>>): Likewise. From-SVN: r218008
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