Loop cof at end of nested long loops -39, Subroutine call to end of loops -39, Rule l.c.9 – Freescale Semiconductor StarCore SC140 User Manual
Page 289: Rule l.c.10
Static Programming Rules
SC140 DSP Core Reference Manual
7-39
Rule L.C.9
A loop COF instruction (BREAK, CONT, CONTD, or SKIPLS) cannot have a COF destination that is one
VLES before two consecutive VLES that are both LA of long loops.
Example 7-70. Loop COF at End of Nested Long Loops
doen0 #5
...
loopstart0
...
doen1 #10
...
loopstart1
...
doen2 d0
...
skipls _dest
; not allowed
loopstart2
...
loopend2
...
_dest
nop
nop
; last address of long loop 1
loopend1
nop
; last address of long loop 0
loopend0
Rule L.C.10
A BSR, BSRD, JSR, or JSRD instruction cannot have a COF destination that is LA-2 of a long loop or SA
of a short loop.
Example 7-71. Subroutine Call to End of Loops
dosetup0 label1
doen0 d1
nop
nop
loopstart0
label1 nop
nop
jsr label2
;not allowed
nop
nop
inca r1
label2 inca r7
;LA-2
add d1,d2,d3
;LA-1
move.w d3,(r0)
;LA
loopend0