Slot Inst | 6 3 | 6 2 | 6 1 | 6 0 | 5 9 | 5 8 | 5 7 | 5 6 | 5 5 | 5 4 | 5 3 | 5 2 | 5 1 | 5 0 | 4 9 | 4 8 | 4 7 | 4 6 | 4 5 | 4 4 | 4 3 | 4 2 | 4 1 | 4 0 | 3 9 | 3 8 | 3 7 | 3 6 | 3 5 | 3 4 | 3 3 | 3 2 | 3 1 | 3 0 | 2 9 | 2 8 | 2 7 | 2 6 | 2 5 | 2 4 | 2 3 | 2 2 | 2 1 | 2 0 | 1 9 | 1 8 | 1 7 | 1 6 | 1 5 | 1 4 | 1 3 | 1 2 | 1 1 | 1 0 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Format x24 - 24 bit(s) | 0 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
RFI | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||
s | 3 | 2 | 1 | 0 |
RFI 0..15
(please consult the Xtensa ® Instruction Set Architecture Reference Manual for any cross references and additional information)
RFI
returns from a high-priority interrupt. It restores the PS
from EPS[level]
and jumps to the address in EPC[level]
. Level
is given as a constant 2..
(NLEVEL+
NNMI) in the instruction word. The operation of this opcode when level is 0 or 1 or greater than (NLEVEL+
NNMI) is undefined.
RFI
is a privileged instruction.
if CRING != 0 then Exception (PrivilegedCause) else nextPC ← EPC[level] PS ← EPS[level] endif
In | Out |
---|---|
EPC1 Estage , EPC2 Estage , EPC3 Estage ,
EPC4 Estage , EPC5 Estage , EPC6 Estage ,
EPS2 Estage , EPS3 Estage , EPS4 Estage ,
EPS5 Estage , EPS6 Estage
|
PSWOE Estage , PSCALLINC Estage ,
PSOWB Mstage , PSUM Mstage , PSEXCM Estage ,
PSINTLEVEL Mstage , InOCDMode Wstage
|