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Atomic operations on i386/amd64
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t...@freebsd.org
Aug 5, 2004, 1:05:34 AM8/5/04
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Is there any particular reason why atomic_load_acq_*() and
atomic_store_rel_*() are implemented with CMPXCHG and XCHG instead of
MOV on i386/amd64 UP?
atomic_store_rel_*() are implemented with CMPXCHG and XCHG instead of
MOV on i386/amd64 UP?
Also, could we use MFENCE/LFENCE/SFENCE in combination with MOV on
SMP systems instead of LOCK CMPXCHG / (implied LOCK) XCHG?
Tim
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