asin_impl_double()

double fl::asin_impl_double

(

double

value

)

Definition at line 557 of file math.cpp.hpp.

                                      {
#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
}

References fl::detail::atan_full_(), fl::detail::sqrt_newton_(), and type_rank< T >::value.

Referenced by acos_impl_double(), and asin().

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