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optimize x86 feclearexcept
author
Rich Felker
<dalias@aerifal.cx>
Sat, 17 Mar 2012 23:29:00 +0000
(19:29 -0400)
committer
Rich Felker
<dalias@aerifal.cx>
Sat, 17 Mar 2012 23:29:00 +0000
(19:29 -0400)
if all exception flags will be cleared, we can avoid the expensive
store/reload of the environment and just use the fnclex instruction.
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