CAS操作包含三个操作数——内存位置(V)、预期原值(A)和新值(B)。
A CAS operation includes three operands — a memory location (v), the expected old value (a), and a new value (B).
根据操作数是字节 (byte)、字 (word) 还是长型 (long),指令的后缀可以是 b、w 或 l。
The instructions are suffixed by b, w, or l, depending on whether the operand is a byte, word, or long.
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