26 lines
348 B
ArmAsm
26 lines
348 B
ArmAsm
.define .exg
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! d0 : exchange size in bytes
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.text
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.exg:
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move.l (sp)+,.savret
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movem.l d1/a1/a2,.savreg
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move.l sp,a1
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sub.l d0,sp
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move.l sp,a2
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asr #1,d0
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move.l d0,d1
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1:
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move.l (a1)+,(a2)+
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sub #1,d0
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bgt 1b
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move.l sp,a1
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asr #1,d1
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1:
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move.l (a1)+,(a2)+
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sub #1,d1
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bgt 1b
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move.l a1,sp
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movem.l .savreg,d1/a1/a2
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move.l .savret,-(sp)
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rts
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