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ARM interrupt handling

I have following question:

I want to know in ARM7 if inside FIQ isr I put a SWI instruction then whether first the FIQ will complete and then SWI exception will be taken or SWI exception will get nested inside the FIQ jandler that is immediately SWI exception will be taken ,it will be processed and then the program flow will come back to FIQ ISR handler ??

Thanks in advance for reply

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