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Subjects>Math>Basic Math

What is the operational difference between the IRET and RET instruction?

Anonymous

∙ 10y ago

Updated: 9/28/2023

Both are used for Return operations. But the difference is IRET uses extra 2 bytes along with 2 bytes(making it 4 bytes) for poping from stack. And RET uses only 2 byte of instruction for Poping. IRET is used to switch from Virtual Mode to Protected Mode whereas RET isn't.

Wiki User

∙ 10y ago

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What is the operational difference between the IRET and RET instructions?

Usually return from interrupt restores the flags so that the interrupted code can continue to execute properly. Return from subroutine does not need to do that instruction is used intentionally in that flow of code and known that the flags are or are not destroyed depending on the architecture.

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