acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))
[musl] / src / math / llrint.c
2012-03-18 nszmake lrint and llrint functions work without fenv support
2012-03-18 nszfaster lrint and llrint functions
2012-03-13 Rich Felkerfirst commit of the new libm!