XTAB	R0>>8, R2          // ERROR "illegal shift"
	XTAH	R0<<16, R2         // ERROR "illegal shift"
	XTABU	R0->24, R2         // ERROR "illegal shift"
	XTAHU	R0@>1, R2          // ERROR "illegal shift"
	XTAB	R0>>8, R5, R2      // ERROR "illegal shift"
	XTAH	R0<<16, R5, R2     // ERROR "illegal shift"
	XTABU	R0->24, R5, R2     // ERROR "illegal shift"
	XTAHU	R0@>1, R5, R2      // ERROR "illegal shift"

			}
		}

		if hexes != "" {
			hexByLine[fmt.Sprintf("%s:%d", input, lineno)] = hexes
		}

		// Canonicalize spacing in printed form.
		// First field is opcode, then tab, then arguments separated by spaces.
		// Canonicalize spaces after commas first.
		// Comma to separate argument gets a space; comma within does not.
		var buf []byte
		nest := 0
		for i := 0; i < len(printed); i++ {