acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))
[musl] / src / thread / pthread_getspecific.c
2011-03-03 Rich Felkeroptimize POSIX TSD for fast pthread_getspecific
2011-02-12 Rich Felkerinitial check-in, version 0.5.0