x86: work around old GCC versions (pre 9.0) having broken xgetbv implementations
Hi folks,
This PR takes care of GCC 8 not exposing _xgetbv
as per the Intel standard. Just in case, I added the assembly-based fallback too.
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Hi folks,
This PR takes care of GCC 8 not exposing _xgetbv
as per the Intel standard. Just in case, I added the assembly-based fallback too.