26 lines
369 B
ArmAsm
26 lines
369 B
ArmAsm
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.define Mlu4
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! This subroutine multiplies two fourbyte unsigned integers.
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! For more details see mli.s
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! The only difference is that zeropage locations are twice as big.
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Mlu4:
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ldy #0
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sty UNSIGN
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jsr Pop
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stx ARTH
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sta ARTH+1
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jsr Pop
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stx ARTH+2
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sta ARTH+3 ! multiplier
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jsr Pop
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stx ARTH+4
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sta ARTH+5
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jsr Pop
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stx ARTH+6
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sta ARTH+7 ! multiplicand
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jmp Mul4
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