Nios® V Processor Software Developer Handbook

ID 743810
Date 5/26/2023
Public

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8.4.1.7. Use a Separate Exception Stack

The HAL implements two types of separate exception stack. Using a separate exception stack entails a slight additional overhead.

When processing a software exception or hardware interrupt, the processor must execute additional instructions on entry and exit, to change the stack pointer. Take this additional processing time into account if your interrupt response requirements are extremely strict.