Re: Implementation of lock-free atomics on m68k
On Dez 18 2016, John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> wrote:
> I knew m68k has CAS/CAS2, but my suspicion was that lock-free atomics
> require LDREX/STREX-alike instructions since older ARM implementations
> have SWP/SWPB as well. So it shouldn't be too different from the CAS
> instructions on m68k, should it?
SWP is UP-only, and armv8 doesn't implement it.
Andreas.
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Andreas Schwab, schwab@linux-m68k.org
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