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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_200
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261_01
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test.sa
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1988-02-23
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* test.sa - test file for as68... bubble sort
* (from example 5-4 of Leo Scanlon's "The 68000: Principles and Programming")
*
ORG $4000
sort nop first part of program
link a3,#-20 try the link instruction
movem.l d0-d3/a0/a1,-(sp)
clr.b temp1 exchange flag = 0
move (a0)+,d3 load word count to d3
loop move.l a0,a1 load elt. addr. into a1
subq #1,d3 decrement word count
move d3,d0 and load it into counter
comp move (a1)+,d2 fetch word to d2
cmp (a1),d2 is next .gt. this?
bls.s decctr yes, continue
move (a1),-2(a1) else no - exchange these two
move d2,(a1)
tas temp1 turnn on exchange flag
decctr dbf d0,comp end?
not.b temp1 yes - exchange is over
bpl.s loop if so, start over
movem.l (sp)+,d0-d3/a0/a1 restore scratch
done rts exit
temp dc.l 1234
temp1 dc.w 9876
dc.b 12
dc.b 15
dc.b 'Hello there ASCII text! How''s things?'
ds.w 0
dc.w 100
END