Parallel error detection for leading zero anticipation Lza算法的錯誤并行檢測
By using a reflector and two pentaprisms , one beam of light is separated into two parallel beams , then respectively they are received by two optical systems of the large scale photoelectric theodolite with certain imaging d - value which correspondingly represents each optic axis parallel error of these two optical systems 方法是利用一塊反射鏡和兩塊五棱鏡將一束準直光束分光成兩束平行光束,大型經緯儀的兩個光學系統分別接收這兩束平行光,兩束平行光所成像的脫靶量差值即為兩光學系統的光軸平行度。
The algorithm and its implementation of the leading zero anticipation are very vital for the performance of a high - speed floating - point adder in today s state of art microprocessor design . unfortunately , in predicting " shift amount " by a conventional lza design , the result could be off by one position . this paper presents a novel parallel error detection algorithm for a general - case lza 目前國際上已有很多算法對前導0預測算法進行了研究,但是出于設計方法和延遲等方面的限制,大部分前導0預測算法都為非精確算法,其預測結果可能與真實加法結果中前導0的個數產生一位的誤差,這個誤差需要在浮點加法的后規格化過程中進行修正,因此反過來又增加了浮點加減算法的關鍵路徑延遲。