"These functions return zero if neither argument is NaN, and a and b are equal." Note that due to some kind of historical accident, __eqdf2 and __nedf2 are defined to have the same return value.
pub fn __eqdf2(a: f64, b: f64) callconv(.c) i32
pub fn __eqdf2(a: f64, b: f64) callconv(.c) i32 {
return __cmpdf2(a, b);
}