Iret - Interrupt Return - Samsung SAM88RCRI S3C9442 Manual

SAM88RCRI INSTRUCTION SET
IRET
— Interrupt Return
IRET IRET
FLAGS ← @SP
Operation:
SP ← SP + 1
PC ← @SP
SP ← SP + 2
SYM(2) ← 1
This instruction is used at the end of an interrupt service routine. It restores the flag register and
the program counter. It also re-enables global interrupts.
Flags: All flags are restored to their original settings (that is, the settings before the interrupt occurred).
Format:
IRET
(Normal)
6-24
opc
S3C9442/C9444/F9444/C9452/C9454/F9454
Opcode
Bytes Cycles
1 10
12
(Hex)
BF