Freescale Semiconductor StarCore SC140 - Manual (Page 691)

RTSTKD
SC140 DSP Core Reference Manual A-377
Example
rtstkd
Instruction Formats and Opcodes
Instruction Comment
- - -
jsr SUB
Jump to subroutine at SUB. Push the PC and SR onto the
stack.
- - - Skip over these instructions.
SUB MOVE.w #$16,d4 Execute the subroutine here.
- - -
move.w #lbl,(SP-8) Change the original value in the stack for PC to lbl.
rtstk move.l #$35,d1
inc d1
Restore the new value lbl to PC. Load $35 into d1. Incre-
ment d1 to $36, the delay slot instruction.
move.l #$16,d5 This instruction skipped.
lbl move.l #$16,d6 Continue executing here.
Instruction Words Cycles
1
Note 1: RTSTKD uses 5 cycles if shadow SP is valid. RTSTKD uses 6 cycles if the shadow SP is not valid. To
get the correct cycle count for this instruction, subtract the execution time used by the execution set in the
delay slot. The cycle count for this instruction cannot be less than 2 cycles.
Type Opcode
15 8 7 0
RTSTKD 1 5/6 4 1 0 0 1 1 1 1 1 0 1 1 1 0 1 0 0