Actual Example (With Delay Slot) - Fujitsu MB91460 SERIES FR60 User Manual

Chapter 7 Branch Instruction

3.Actual Example (with Delay Slot)

3. Actual Example (with Delay Slot)
3.1 JMP:D @Ri / CALL:D @Ri Instruction
Ri referred in JMP:D @Ri / CALL:D @Ri instruction remains intact even if instructions within delay
slot update Ri.
• Example
LDI:32 #Label,
JMP:D @R0
LDI:8 #0,
...
3.2 RET:D Instruction
RP referred in RET:D instruction remains intact even if instructions within delay slot update RP.
• Example
RET:D
MOV R8,
...
3.3 Bcc:D rel Instruction
Flag referred in Bcc:D rel instruction also remains unaffected by instructions within delay slot.
• Example
ADD #1,
BC:D Overflow
ANDCCR #0
...
3.4 CALL:D Instruction
When RP is referred using the instruction within delay slot of CALL:D instruction, the data updated
by CALL:D instruction is read out.
• Example
CALL:D Label
MOV RP,
...
130
R0
; Branches to Label.
R0 ; Not affect any branched address.
; Branches to the address previously specified in RP.
RP ; Not affect any return operation.
R0 ; Change of flag
; Branches in accordance with the execution result of instructions above.
; This flag update is not referred in branch instruction above.
; Branches by updating RP.
R0 ; Transfers RP based on the execution results of CALL: D above.