30 lines
429 B
ArmAsm
30 lines
429 B
ArmAsm
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.define .cmu
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! d0 : # bytes of 1 block
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.text
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.cmu:
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movem.l d2/a0/a1/a2,.savreg
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move.l (sp)+,a2 ! reta
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move.l sp,a0 ! top block
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move.l sp,a1
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add.l d0,a1 ! lower block
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move.l d0,d2
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asr.l #2,d0
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sub.l #1,d0
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move.l #1,d1 ! greater
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1:
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cmp.l (a0)+,(a1)+
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bne 2f
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dbf d0,1b
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clr.l d1 ! equal
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2:
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bcc 3f
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neg.l d1 ! less
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3:
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asl.l #1,d2
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add.l d2,sp ! new sp
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move.l a2,-(sp)
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movem.l .savreg,d2/a0/a1/a2
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rts
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.align 2
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