IRET/IRETD - Interrupt Return Usage: IRET IRETD (386+) Modifies flags: AF CF DF IF PF SF TF ZF Returns control to point of interruption by popping IP, CS and then the Flags from the stack and continues execution at this location. CPU exception interrupts will return to the instruction that cause the exception because the CS:IP placed on the stack during the interrupt is the address of the offending instruction. Clocks Size Operands 808x 286 386 486 Bytes iret 32/44 17+m 22 15 1 iret (prot. mode) - 31+m 38 15 1 iret (to less privilege) - 55+m 82 36 1 iret (different task, NT=1) - 169+m TS TS+32 1 iretd - - 22/38 15 1 iretd (to less privilege) - - 82 36 1 iretd (to VM86 mode) - - 60 15 1 iretd (different task, NT=1) - - TS TS+32 1 - 386 timings are listed as real-mode/protected-mode
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