Assembly Language Help (alang.hlp) (
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CMPXCHG Instruction
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────────────────────────────────────────────────────────────────────────────
00001111 1011000b mod,reg,r/m disp (0, 1, or 2)
────────────────────────┬───────────────────────────┬───────────────────────
CMPXCHG mem,reg │ cmpxchg warr[bx],cx │ 88/86 ──
│ cmpxchg string,bl │ 286 ──
│ │ 386 ──
│ │ 486 7-10
────────────────────────┴───────────────────────────┴───────────────────────
────────────────────────┬───────────────────────────┬───────────────────────
CMPXCHG reg,reg │ cmpxchg dl,cl │ 88/86 ──
│ cmpxchg bx,dx │ 286 ──
│ │ 386 ──
│ │ 486 6
────────────────────────┴───────────────────────────┴───────────────────────
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