Online HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens
IRET/IRETD - Interrupt Return
Usage: IRET
IRETD (386+ only)
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
- see Instruction Timing
[helppc.bosbyte.nl] iret