acos.s fix: use the formula acos(x) = atan2(sqrt(1-x),sqrt(1+x))
[musl] / src / math / i386 / atanl.s
1 .global atanl
2 .type atanl,@function
3 atanl:
4         fldt 4(%esp)
5         fld1
6         fpatan
7         ret