Analog Devices ADSP-BF53x Blackfin Reference page 628

Instruction Overview
Parallel Issue
The instruction cannot be issued in parallel with other
TESTSET
instructions.
Example
testset (p1) ;
The instruction may be preceded by a
TESTSET
to ensure that all previous exceptions or interrupts have been processed
before the atomic operation begins.
Also See
Core Synchronize,
Special Applications
Typically, use
cessors or coprocesses.
16-24 ADSP-BF53x/BF56x Blackfin Processor Programming Reference
System Synchronize
as a semaphore sampling method between copro-
TESTSET
or instruction
CSYNC SSYNC