30 lines
341 B
ArmAsm
30 lines
341 B
ArmAsm
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.define .inn
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! d0 : set size in bytes
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! d1 : bitnumber
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.text
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.inn:
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move.l (sp)+,d2 ! return address
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move.w (sp)+,d1
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move.l sp,a1
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add d0,a1
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move.l sp,a0
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move.l d2,-(sp)
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move d1,d2
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asr #3,d2
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bchg #0,d2
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cmp d0,d2
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bcc 1f
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add d2,a0
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btst d1,(a0)
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beq 1f
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move.l #1,d0
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bra 2f
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1:
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clr d0
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2:
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move.l (sp)+,a0
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move.l a1,sp
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jmp (a0)
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