Most instructions follow a similar format, with the register that holds the result specified in the first operand.
大多数指令都遵循类似的格式，结果存储在第一个操作数内指定的寄存器中。
2
The string format operation involves the processing of the FormatString, looking for format specification sequences, and using these sequences to format the associated data from the right operand.
The first operand is the format string, which contains one or more format sequences, which specify how the second operand is formatted. The result is a string.