A CPU’s out-of-order backend executes operations as their inputs become ready, letting the core keep its execution units fed while waiting for long latency instructions to complete. Different sources give conflicting information about Cortex X925’s reordering window. Android Authority claims 750 MOPs. Wikichip believes it’s 768 instructions, based off an Arm slide that states Cortex X925 doubled reordering capacity over Cortex X4. Testing shows X925 can keep 948 NOPs in flight, which doesn’t correspond with either figure unless NOP fusion only worked some of the time.
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，更多细节参见51吃瓜
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