Freescale Semiconductor StarCore SC140 - Manual (Page 307)

LPMARK Rules
SC140 DSP Core Reference Manual 7-57
Example 7-98. COF Instructions at LPB of a Long Loop
dosetup1 label1
doen1 #n2
move.l #mem_l1,r1
move.l #mem_l2,r0
label1 inc d1
jsr r1 {lpmarkb set} ;not allowed
add d1,d2,d3
move.w d3,(r0)
LPMARK Rule L.C.3 + L.C.5
A Bc or Jc instruction is not allowed at LPA-1 or LPB-1 of a loop.
Example 7-99. Bc/Jc at the Start of a Loop
cmpgt d4,d3
nop
iff doensh3 #count2
bt _dest
;not allowed
inc d2 {lpmarka set}
...
_dest inc d2
dosetup1 label7
move.w #0,d1
doen1 #5
move.w #10,d2
label7 inc d1
bf label6 ;not allowed
inc d2 {lpmarkb set}
inc d3
inc d4