The tradeoff is complexity. The microcode must be carefully arranged so that the instructions in delay slots are either useful setup for both paths, or at least harmless if the redirect fires. Not every case is as clean as RETF. When a PLA redirect interrupts an LCALL, the return address is already pushed onto the microcode call stack (yes, the 386 has a microcode call stack) -- the redirected code must account for this stale entry. When multiple protection tests overlap, or when a redirect fires during a delay slot of another jump, the control flow becomes hard to reason about. During the FPGA core implementation, protection delay slot interactions were consistently the most difficult bugs to track down.
朋友是江苏如皋人，她说小时候家里种的黑塌菜遍地都是，谁也没把它当回事。可如今，靠着冷链技术，这不起眼的“土菜”竟坐上飞机出了海，成了外国人餐桌上的稀罕物。还有哈尔滨，那片冰雪本是当地人习以为常的冬日，用好用足，叠加热情服务，乐了八方来客，连本地人也感慨“尔滨，你让我感到陌生”。绿水青山、冰天雪地都是金山银山，思想入心、思路出新，寻常风景也有新的价值坐标。
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2013年，习近平总书记在这里首提“精准扶贫”重要理念。和中国其他贫困村一样，这个藏在偏僻山谷、一度闭塞落后的苗族村寨命运从此改变。10多年后，这个村庄继续向着扎实推进乡村全面振兴迈进。