assembly - Is there a difference between undefined and unaffected behavior for flags? -


Some sources listed me some flags behaviors as undefined form for some instructions, while different sources list is unaffected I know That undefined behavior of the flag should not be seen, but what about unaffected behavior? Are they the same thing?

No, they are not the same thing

Unaffected means that the fact What do you say in This flag will not change the register's value.

Undefined behavior means that whatever the architecture flag can do with the register.

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