5 delayed cof rules, A.1.4, Nmid update to emr read -19 – Freescale Semiconductor StarCore SC140 User Manual
Page 269: Instructions in a delay slot -19
Static Programming Rules
SC140 DSP Core Reference Manual
7-19
Rule A.7
A RTSTK or RTSTKD instruction cannot be grouped in a VLES with a MOVE-like instruction that reads
the EMR register. For mutually exclusive IFc subgroups in a VLES, this rule applies independently to each
subgroup.
Example 7-29. NMID Update to EMR Read
rtstk
move.l emr,d0
;not allowed
7.5.5 Delayed COF Rules
Rule D.1
The following instructions are not allowed in a delay slot:
•
COF instructions
•
STOP and WAIT
•
DI
•
DEBUG
Example 7-30. Instructions in a Delay Slot
jmpd r1
jmp r2
;not allowed