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* math: fix i386 atan2.s to raise underflow for subnormal resultsSzabolcs Nagy2013-08-151-1/+11
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* asm for inverse trig functionsRich Felker2012-03-191-0/+7
unlike trig functions, these are easy to do in asm because they do not involve (arbitrary-precision) argument reduction. fpatan automatically takes care of domain issues, and in asin and acos, fsqrt takes care of them for us.