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amd64: plug spurious cld instructions
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Authored by mjg on Oct 5 2019, 5:12 PM.
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Summary

ABI already guarantees the direction is forward. Note this does not take care of i386-specific cld's.

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rS FreeBSD src repository - subversion
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Why did you left i386 out ?

I do not think it needs cld's as well, both ABI and actual exception/interrupt entry code clear IF.D both on i386 and amd64.

i386 has a lot of cld already and I have no means to test the removal. I can plug them from the places modified by this patch though.

This revision is now accepted and ready to land.Oct 8 2019, 9:11 PM
This revision was automatically updated to reflect the committed changes.