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Thumb and Thumb2

seifeddine jlassi

Hello evreybody,

I have met a confusiong issue while working with the RVMDK assembly:
when I have written this statement:

ADD r1, r1, r2


It has been coded in Thumb2. But when I have changed the ADD instruction to ADDS, it become a Thumb instruction!
Could any one explain to me why the add of the S, which indicates if the stauts register has to be modified or not, changes the mode in wich the instruction is coded.

Thanks to all

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