* \fn fixed fixadd (fixed x, fixed y) * \brief Returns the sum of two fixed point values. * * This function adds two fixed point values \a x and \a y, and * returns the sum. * * \param x x,y: Two addends. * \param y x,y: Two addends. * \return The sum. If the result runs out of range of fixed point, * this function sets \a errno to \a ERANGE. * * \sa fixsub */
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