"These functions calculate a <=> b. That is, if a is less than b, they return -1; if a is greater than b, they return 1; and if a and b are equal they return 0. If either argument is NaN they return 1..."
Note that this matches the definition of __lesf2, __eqsf2, __nesf2, __cmpsf2,
and __ltsf2.
fn __cmpsf2(a: f32, b: f32) callconv(.c) i32
fn __cmpsf2(a: f32, b: f32) callconv(.c) i32 {
return @backingInt(cmpf2(f32, LE, a, b));
}