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INSTRUCTION SET S3C4520A RISC MICROCONTROLLER Examples ADR R0, Into_THUMB + 1 BX R0 CODE16 Into_THUMB ADR R5, Back_to_ARM BX R5 ALIGN CODE32 Back_to_ARM 3-6 ; ; ; ; ; ; ; Generate branch target address and set bit 0 high - hence arrive in THUMB state. Branch and change to THUMB state. Assemble subsequent code as THUMB instructions ; Generate branch target to word aligned address ; - hence bit 0 is low and so change back to ARM state. ; Branch and change back to ARM state. ; Word align ; Assemble subsequent code as ARM instructions
