NEGF	F0, F1, F2         // ERROR "illegal combination"
	NEGD	F0, F1, F2         // ERROR "illegal combination"
	ABSF	F0, F1, F2         // ERROR "illegal combination"
	ABSD	F0, F1, F2         // ERROR "illegal combination"
	SQRTF	F0, F1, F2         // ERROR "illegal combination"
	SQRTD	F0, F1, F2         // ERROR "illegal combination"
	MOVF	F0, F1, F2         // ERROR "illegal combination"

//	{
//		outcode(int($1), &$2, 0, &$4);
//	}
	MOVD	foo<>+3(SB), F2
	MOVD	16(R1), F2
	MOVD	(R1), F2

//	LFMOV fimm ',' freg
//	{
//		outcode(int($1), &$2, 0, &$4);
//	}
	MOVD	$0.1, F2 // MOVD $(0.10000000000000001), F2

//	LFMOV freg ',' freg
//	{
//		outcode(int($1), &$2, 0, &$4);
//	}
	MOVD	F1, F2

//	LFMOV freg ',' addr
//	{
//		outcode(int($1), &$2, 0, &$4);
//	}

        if (f1.isDirectory() != f2.isDirectory()) {
            return f1.isDirectory() ? -1 : 1;
        }
        if (f1.isDirectory()) {
            return f1name.compareToIgnoreCase(f2.getName());
        }
        diff = f1.length() - f2.length();
        if (diff == 0) {
            return f1name.compareToIgnoreCase(f2.getName());
        }
        return diff > 0 ? -1 : 1;
    }

    /**

				return
			}
		}

		// Apply http tracing "middleware" based on presence of flag.
		var f2 http.HandlerFunc
		if handlerFlags.Has(traceAllFlag) {
			f2 = httpTraceAll(f)
		} else {
			f2 = httpTraceHdrs(f)
		}

		// call the final handler
		f2(w, r)
	}

	// Enable compression of responses based on presence of flag.
	if !handlerFlags.Has(noGZFlag) {

	FTINTRMWF	F0, F2		// 02041a01
	FTINTRMWD	F0, F2		// 02081a01
	FTINTRMVF	F0, F2		// 02241a01
	FTINTRMVD	F0, F2		// 02281a01
	FTINTRPWF	F0, F2		// 02441a01
	FTINTRPWD	F0, F2		// 02481a01
	FTINTRPVF	F0, F2		// 02641a01
	FTINTRPVD	F0, F2		// 02681a01
	FTINTRZWF	F0, F2		// 02841a01
	FTINTRZWD	F0, F2		// 02881a01
	FTINTRZVF	F0, F2		// 02a41a01
	FTINTRZVD	F0, F2		// 02a81a01
	FTINTRNEWF	F0, F2		// 02c41a01

	//TODO VFMOV R7, V25.D[1]                  // f900af9e
	FMOVD F2, R15                              // 4f00669e
	FMOVD R3, F11                              // 6b00679e
	FMOVS F20, R29                             // 9d02261e
	FMOVS R8, F15                              // 0f01271e
	FMOVD F2, F9                               // 4940601e
	FMOVS F4, F27                              // 9b40201e

	CFUGED R1, R2, R3                       // 7c2311b8
	CNTLZDM R2, R3, R1                      // 7c411876
	CNTTZDM R2, R3, R1                      // 7c411c76
	DCFFIXQQ V1, F2                         // fc400fc4
	DCTFIXQQ F2, V3                         // fc6117c4
	LXVKQ $0, VS33                          // f03f02d1
	LXVP 12352(R5), VS6                     // 18c53040
	LXVPX (R1)(R2), VS4                     // 7c820a9a

	FLDPQ	(R1), (F2, F2)                                   // ERROR "constrained unpredictable behavior"
	FSTPQ	(R1, R2), (R0)                                   // ERROR "invalid register pair"
	FLDPD	(R0), (R1, R2)                                   // ERROR "invalid register pair"
	FLDPD	(R1), (F2, F2)                                   // ERROR "constrained unpredictable behavior"

	MOVBU	X5, (X6)			// ERROR "unsupported unsigned store"
	MOVHU	X5, (X6)			// ERROR "unsupported unsigned store"
	MOVWU	X5, (X6)			// ERROR "unsupported unsigned store"
	MOVF	F0, F1, F2			// ERROR "illegal MOV instruction"
	MOVD	F0, F1, F2			// ERROR "illegal MOV instruction"
	MOV	X10, X11, X12			// ERROR "illegal MOV instruction"
	MOVW	X10, X11, X12			// ERROR "illegal MOV instruction"

		if len(cmap) == len(contexts) {
			features = append(features, f)
			continue
		}
		comma := strings.Index(f, ",")
		for cname := range cmap {
			f2 := fmt.Sprintf("%s (%s)%s", f[:comma], cname, f[comma:])
			features = append(features, f2)
		}
	}

	bw := bufio.NewWriter(os.Stdout)
	defer bw.Flush()

	var required []string
	for _, file := range checkFiles {