26.1 XCHG (all processors)


日期: 2000-04-02 15:00 | 联系我
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26. Problematic Instructions

26.1 XCHG (all processors)

The XCHG register,[memory] instruction is dangerous. By default this instruction has an implicit LOCK prefix which prevents it from using the cache. This instruction is therefore very time consuming, and should always be avoided.

标签: MMX 优化

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