return OPVCC(31, 247, 0, 0) /* stbux */
	case AFMOVD:
		return OPVCC(31, 727, 0, 0) /* stfdx */
	case AFMOVDU:
		return OPVCC(31, 759, 0, 0) /* stfdux */
	case AFMOVS:
		return OPVCC(31, 663, 0, 0) /* stfsx */
	case AFMOVSU:
		return OPVCC(31, 695, 0, 0) /* stfsux */
	case AFMOVSX:
		return OPVCC(31, 983, 0, 0) /* stfiwx */

	case AMOVHZ, AMOVH:
		return OPVCC(31, 407, 0, 0) /* sthx */
	case AMOVHBR:

	stdZeroSecond                                  // "05"
	stdLongYear              = iota + stdNeedDate  // "2006"
	stdYear                                        // "06"
	stdPM                    = iota + stdNeedClock // "PM"
	stdpm                                          // "pm"
	stdTZ                    = iota                // "MST"
	stdISO8601TZ                                   // "Z0700"  // prints Z for UTC