45 lines
493 B
ArmAsm
45 lines
493 B
ArmAsm
.define .dvi
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.sect .text
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.sect .rom
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.sect .data
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.sect .bss
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! signed long divide
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.sect .text
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.dvi:
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move.l 4(sp),d0
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move.l 8(sp),d1
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move.l d4,-(sp)
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clr.l d4
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tst.l d0 ! divisor
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bpl 1f
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neg.l d0
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not d4
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1:
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tst.l d1 ! dividend
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bpl 2f
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neg.l d1
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not d4
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swap d4
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not d4
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swap d4
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2:
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move.l d1,-(sp)
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move.l d0,-(sp)
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jsr .dvu
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tst d4
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beq 5f
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neg.l d1 ! quotient
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5:
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tst.l d4
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bpl 6f
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neg.l d2 ! remainder
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6:
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move.l (sp)+,d4
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move.l (sp)+,a0
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add.l #8,sp
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move.l a0,-(sp)
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rts
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.align 2
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