Synchronising C/C++ and POWER

  title={Synchronising C/C++ and POWER},
  author={Susmit Sarkar and Kayvan Memarian and Scott Owens and Mark Batty and Peter Sewell and Luc Maranget and Jade Alglave and Derek Williams},
Shared memory concurrency relies on synchronisation primitives: compare-and-swap, load-reserve/store-conditional (aka LL/SC), language-level mutexes, and so on. In a sequentially consistent setting, or even in the TSO setting of x86 and Sparc, these have well-understood semantics. But in the very relaxed settings of IBM®, POWER®, ARM, or C/C++, it remains surprisingly unclear exactly what the programmer can depend on. This paper studies relaxed-memory synchronisation. On the hardware side, we… CONTINUE READING
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