// If we're absorbing, we need to xor the input into the state
		// before applying the permutation.
		xorIn(d, d.storage[:d.rate])
		d.n = 0
		keccakF1600(&d.a)
	case spongeSqueezing:
		// If we're squeezing, we need to apply the permutation before
		// copying more output.
		keccakF1600(&d.a)
		d.i = 0
		copyOut(d, d.storage[:d.rate])
	}
}

// pads appends the domain separation bits in dsbyte, applies