> You'd need to run strlen first. I might be a bit rusty in my x86 assembly, but... | Hacker News

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cesarb on May 23, 2025 | parent | context | favorite | on: 32 bits that changed microprocessor design

> You'd need to run strlen first.

I might be a bit rusty in my x86 assembly, but wouldn't "repnz movsb" be the x86 strcpy opcode, for zero-terminated strings?

saagarjha on May 24, 2025 | [–]

Not a thing unfortunately; you can only use the rep prefix with movable.

muziq on May 23, 2025 | [–]

movsb doesn’t set any flags, so no, it isn’t..

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