Intel documentation describes the 386's Protection Test Unit as a component that "implements fast testing of complex memory protection functions." It is mostly composed of a PLA (Programmable Logic Array), referred to as Test PLA by Intel, that is physically visible by its regular appearance on the die. This single piece of combinational logic replaces what would otherwise be dozens of multi-cycle conditional branches in the microcode. Instead of testing privilege rules sequentially, the microcode issues a single protection test operation, and the PLA evaluates all applicable rules in parallel, producing a complete decision in one evaluation: continue, fault, or redirect to a gate handler.
while (stack.length 0 && nums[stack[stack.length - 1]] <= curHeight) {
，详情可参考爱思助手下载最新版本
Truly invisible (rarely even mentioned)
这恰恰是智界需要明确的地方，是做年轻人爱开的驾驶者之车，还是走科技豪华路线去和问界抢市场？
疫情、地震、洪涝……历经各种风险挑战，防止返贫致贫的“铜墙铁壁”冲不倒、守得住！积石山的变化，正是中国为何能创造减贫奇迹的生动解答。