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68000 code optimisations
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09 June 2022, 09:02
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meynaf
son of 68k
Join Date: Nov 2007
Location: Lyon / France
Age: 51
Posts: 5,323
You don't necessarily need to do 32-n.
What about :
Code:
moveq #-1,d2 lsl.l d3,d2 eor.l d1,d0 and.l d2,d0 eor.l d1,d0 ror.l d3,d0 asr.l d3,d1
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