32 lines
470 B
ArmAsm
32 lines
470 B
ArmAsm
.define .set
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! d0 : setsize in bytes
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! d1 : bitnumber
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.text
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.set:
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movem.l d1/d2/a1,.savreg
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move.l (sp)+,.savret
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move.l (sp)+,d1
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move.l d0,d2
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asr.l #2,d2
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1:
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clr.l -(sp) !create empty set
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sub.l #1,d2
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bgt 1b
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move.l sp,a1 ! set base
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move.l d1,d2
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asr.l #4,d2
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!bchg #0,d2
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cmp.l d0,d2
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bcs 1f
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move.w #ESET,-(sp)
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move.l .savret,-(sp)
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jmp .trp
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1:
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add.l d2,a1
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move.l (a1),d2
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bset d1,d2
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move.l d2,(a1)
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movem.l .savreg,d1/d2/a1
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move.l .savret,-(sp)
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rts
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