lazy stacking是什么意思?

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lazy stacking是什么意思?
Cortex-M处理器中的lazy stacking中文是啥意思?

我是看TI的cortex-M4看到的,内容如下：
This function enables the lazy stacking of floating-point registers s0-s15 when an interrupt is
handled.When lazy stacking is enabled,space is reserved on the stack for the floating-point
context,but the floating-point state is not saved.If a floating-point instruction is executed from
within the interrupt context,the floating-point context is first saved into the space reserved on
the stack.On completion of the interrupt handler,the floating-point context is only restored if it
was saved (as the result of executing a floating-point instruction).
我觉得lazy的意思是滞留,就是说把浮点寄存器内容驻留下来,中断过后,直接调用保存的内容.

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