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What is P1, P2, P3 and P4 use in Thumb2 IF block instruction?

Robert

Hi,

When I read IT block in Thumb2 instruction, I don't understand the use of P1, P2, P3 and P4. From below pictures, can you tell me what use are P1, P2, P3 and P4?

Thanks,

This line is especially puzzling. Could you explain it to me?     Next instruction has condition cond_base, P1

Thumb2P.PNG
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