Function asin_impl_double

src/fl/math/math.cpp.hpp:557–568

}

double asin_impl_double(double value) {
#if FL_MATH_USE_LIBM
    return ::asin(value);
#else
    const double kPiHalf = 1.57079632679489661923;
    if (value >=  1.0) return  kPiHalf;
    if (value <= -1.0) return -kPiHalf;
    const double denom = detail::sqrt_newton_<double>(1.0 - value * value);
    if (denom == 0.0) return value > 0.0 ? kPiHalf : -kPiHalf;
    return detail::atan_full_<double>(value / denom);
#endif
}

float acos_impl_float(float value) {
#if FL_MATH_USE_LIBM