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RetIfST ss,bb+ [D>=12]

Return from subroutine if semaphore ss is true. The semaphore base address bb is optional; if omitted it is taken to be 0.

For more details see the semaphore tutorial.

+ From dialect 16 the address argument will be jndexed when executed inside a MultiTrack task and will be indexed if the instruction is preceded by the IasJ: precode.

Dialect restriction: Available only in boards with dialect 12 or greater.

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