expect = 1
	case AVLD2, AVST2, AVLD2R:
		expect = 2
	case AVLD3, AVST3, AVLD3R:
		expect = 3
	case AVLD4, AVST4, AVLD4R:
		expect = 4
	}

	if expect != n {
		c.ctxt.Diag("expected %d registers, got %d: %v.", expect, n, p)
	}
}

/* checkShiftAmount checks whether the index shift amount is valid */
/* for load with register offset instructions */