允许前导零，但原始实现从来不会返回前导零。
Leading zeros are allowed, however our original implementation never returns leading zeros.
计算前导零，然后从 31 中减去前导零数量，就可以将产生的掩码转换为索引。
You can translate the resulting mask back into a single index by counting the leading zeroes, and then subtracting that from 31. A possible assembly language instruction sequence to do this would be
本文中的前导零预测逻辑是基于一套统一的“产生式规则”，可以消除原有前导零预测逻辑潜在的一位预测错误。
Leading zeros anticipatory logic is implemented based on a set of unified product rule, which can diminish the potential one bit error of original ones.
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