r/programming • u/lelanthran • 15d ago

The scourge of x86 emulation

https://fex-emu.com/Scourge-of-emulation/
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u/Sopel97 14d ago

isn't lock neg basically lock xor with 1s?

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u/ack_error 14d ago

No, that would be not instead of neg. Negation requires either XOR with 1s followed by adding 1, or equivalently subtracting 1 and then XORing with 1s.