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Subtraction

Coverage of Subtraction in the Nexus archive.

Earliest in view: Apr 22 · 06:38 UTCMost recent: Apr 22 · 06:38 UTC

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TECHNOLOGYApr 22 · 06:38 UTCHACKER NEWS
XOR'ing a register with itself is the idiom for zeroing it out. Why not sub?
The article explains that in assembly programming, XOR'ing a register with itself is a common idiom to zero it out, and discusses why subtraction is not used for the same purpose. It references a Microsoft blog post and Hacker News comments for context.