fixed length logical operand 定长逻辑操作数
variable length logical operand [计] 可变长度逻辑操作数
length logical operand 定逻辑操作数
If the size of the operand is not specified in the instruction, that means either that the size doesn't matter (as in logical instructions, for instance) or that it is using a 32-bit value size.
如果操作数的大小未在指令中指定，这就意味着操作数的大小并不十分重要(例如逻辑指令)或者它的大小为32位。
The Z-attribute is a 32-bit operand that can be operated on with the logical primitives AND or OR.
属性是个32位的操作数，可以进行逻辑“与”“或”的操作。
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