You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: Aasincos.go
    path of file: ./repos/tegola/vendor/github.com/go-spatial/proj/support
    
    the code of the file until where you have to start completion: // Copyright (C) 2018, Michael P. Gerlek (Flaxen Consulting)
//
// P
    
func Aasin(v float64) float64 {

	av := math.Abs(v)

	if av >= 1. {
		if av > oneTol {
			// TODO: we are supposed to signal an error, but not actually fail
			mlog.Printf("error signal in aasin()")
		}
		if v < 0. {
			return -math.Pi / 2.0
		}
		return math.Pi / 2.0
	}
	return math.Asin(v)
}