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Today, 07:47
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#21 |
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Registered User
Join Date: Aug 2020
Location: Huddinge
Posts: 26
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If you make sure your dx and dy are between -128 and 127, and have lots of memory you could do something like:
Code:
; d0 = dy ; d1 = dx ; a0 = pointer to middle of table with high byte ; a1 = pointer to middle of table with low byte ; result in d2 lsl.w #8,d0 move.b d1,d0 move.b (a0,d0.w),d2 lsl.w #8,d2 move.b (a1,d0.w),d2 |
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Today, 10:21
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#22 |
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Registered User
Join Date: Apr 2023
Location: "Hamcastle"
Posts: 30
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I do not know if it is of interest for you, but you could also try to eliminate the divu in your posted code by simply replacing the division with a multiplication of the reciprocal (catchword: lut).
Last edited by Rotschi; Today at 10:37. |
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