https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90346
--- Comment #5 from mikulas at artax dot karlin.mff.cuni.cz --- On non-SSE2 CPUs, it should generate "lock; addl $0,(%esp)" That provides barrier equivalent to "mfence"
mikulas at artax dot karlin.mff.cuni.cz Thu, 01 Aug 2019 07:53:46 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90346
--- Comment #5 from mikulas at artax dot karlin.mff.cuni.cz --- On non-SSE2 CPUs, it should generate "lock; addl $0,(%esp)" That provides barrier equivalent to "mfence"