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Aminet 30
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Aminet 30 (1999)(Schatztruhe)[!][Apr 1999].iso
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Wreckage_src.lha
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asm_rot_A1.asm
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Assembly Source File
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1998-06-30
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744b
|
35 lines
_rot_loop1:
MOVE.b (a2)+ ,d1
BEQ _rot_loop1a
MOVE.l (a0) ,d1 ;d1=ox(n)
CLR.w d1
SWAP d1
MOVE.w d1 ,d2 ;d2=x
MULS.w d6 ,d1 ;x*csa
MULS.w d7 ,d2 ;x*sna
MOVE.l (a1) ,d3 ;oy(n)
CLR.w d3
SWAP d3
MOVE.w d3 ,d4 ;y
MULS.w d7 ,d3 ;y*sna
SUB.l d3 ,d1 ;x*csa-y*sna
MULS.w d6 ,d4 ;y*csa
ADD.l d2 ,d4 ;y*csa+x*sna
_rot_loop1a:
MOVE.l d4 ,(a1)+ ;y(n)=y*csa+x*sna
MOVE.l d1 ,(a0)+ ;x(n)=x*csa-y*sna
SUBQ.l #1 ,d0 ;n=n-1
BGE _rot_loop1