Cof instructions at lpb of a long loop -57, Bc/jc at the start of a loop -57, Lpmark rule l.c.3 + l.c.5 – Freescale Semiconductor StarCore SC140 User Manual
Page 307
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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
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