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23 lines
621 B
ArmAsm
23 lines
621 B
ArmAsm
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; Christian Krueger, 23-May-2018
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; CC65 runtime: helper call for mod/div with signed ints
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;
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; When negating values, we will ignore the possibility here, that one of the
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; values is $8000, in which case the negate will fail.
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.export absvaludiv16
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.import _abs, popax, udiv16
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.importzp ptr1, ptr4
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absvaludiv16:
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jsr _abs
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sta ptr4
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stx ptr4+1 ; Save right absolute operand
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jsr popax
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jsr _abs
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sta ptr1
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stx ptr1+1 ; Save left absolute operand
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jmp udiv16
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