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davrosthedalek
6 months ago
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Clang vs. Clang
Instruction duration isn't constant even within the same arch. You cannot have branches in constant-time code.
I do wonder though how often cpu instructions have data-dependent execution times....
davrosthedalek
6 months ago
[–]
(Correction: You cannot have data-dependent branches. You can of course have branches to make a fixed-iterations for loop, for example)
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I do wonder though how often cpu instructions have data-dependent execution times....