stsRouter.Methods(http.MethodPost).MatcherFunc(func(r *http.Request, rm *mux.RouteMatch) bool {
		ctypeOk := wildcard.MatchSimple("application/x-www-form-urlencoded*", r.Header.Get(xhttp.ContentType))
		authOk := wildcard.MatchSimple(signV4Algorithm+"*", r.Header.Get(xhttp.Authorization))
		noQueries := len(r.URL.RawQuery) == 0
		return ctypeOk && authOk && noQueries
	}).HandlerFunc(httpTraceAll(sts.AssumeRole))

     *
     * @param ctype2
     *            The array of character types to set up.
     */
    protected static void setup(final byte[] ctype2) {
        wordChars(ctype2, 'a', 'z');
        wordChars(ctype2, 'A', 'Z');
        wordChars(ctype2, '0', '9');
        wordChar(ctype2, '@');
        wordChar(ctype2, '|');
        wordChar(ctype2, '_');
        wordChar(ctype2, '?');
        wordChar(ctype2, '>');

// floating-point coprocessor
//
//	LTYPEI cond freg ',' freg
//	{
//		outcode($1, $2, &$3, 0, &$5);
//	}
	ABSF	F1, F2

//	LTYPEK cond frcon ',' freg
//	{
//		outcode($1, $2, &$3, 0, &$5);
//	}
	ADDD	F1, F2
	MOVF	$0.5, F2 // MOVF $(0.5), F2

//	LTYPEK cond frcon ',' LFREG ',' freg
//	{
//		outcode($1, $2, &$3, $5, &$7);
//	}
	ADDD	F1, F2, F3

//	LTYPEL cond freg ',' freg
//	{