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2020-02-06fix excess precision in return value of i386 acos[f] and asin[f]Rich Felker-1/+16
analogous to commit 1c9afd69051a64cf085c6fb3674a444ff9a43857 for atan[2][f].
2012-03-19asm for inverse trig functionsRich Felker-0/+1
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.