Oh no, oh no, oh no. No, no, please no. No, please no. Omg No! No, no, no. Oh, this is so bad.. https://github.com/riscv/riscv-isa-manual/commit/d420a9a5123e03b2d6fb652a9c4e8ad8700a40a3 … #riscvformal
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But yes, UB does not mean "we don't define what happens when X (with X being something like div by zero)". UB means we only define behavior
for programs/systems/whatever that do not do X. If this happens anywhere, all bets are off. Same with a CPU. This is different from things
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that are "implementation defined", or "unspecified", or "unpredictable". Full blown UB means: X happens anywhere, even in the future, and
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the entire spec goes out the window and the system can do whatever it wants. UB is part of the contract between system and user, and the
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