operandn.[数学]操作数operand addressing mode操作数寻址方式operand address register操作数地址寄存器operand effective address运算数有效地址operand fetch instruction取操作数指令Operand Execution Pipeline操作数执行管道operand precision register操作数精度寄存器operand addressing operatio操作数寻址操作operand descriptor register操作对象描述符寄存器operand addressing operation操作数寻址操作operand-precision register操作数精度寄存器