CSETM	NV, R2                                           // ERROR "invalid condition"
	LDP.P	8(R2), (R2, R3)                                  // ERROR "constrained unpredictable behavior"
	LDP.W	8(R3), (R2, R3)                                  // ERROR "constrained unpredictable behavior"
	LDP	(R1), (R2, R2)                                   // ERROR "constrained unpredictable behavior"
	LDP	(R0), (F0, F1)                                   // ERROR "invalid register pair"

	STLXPW (R6, R11), (R22), R21               // c6ae3588
	//TODO STNPW 44(R1), R3, R10               // 2a8c0528
	//TODO STNP 0x108(R3), ZR, R7              // 67fc10a8
	LDP.P -384(R3), (R22, R26)                 // 7668e8a8
	LDP.W 280(R8), (R19, R11)                  // 13add1a9
	STP.P (R22, R27), 352(R0)                  // 166c96a8
	STP.W (R17, R11), 96(R8)                   // 112d86a9

	if r2 != 0 {
		// TODO: Consistency in the encoding would be nice here.
		if p.arch.InFamily(sys.ARM, sys.ARM64) {
			// Special form
			// ARM: destination register pair (R1, R2).
			// ARM64: register pair (R1, R2) for LDP/STP.
			if prefix != 0 || scale != 0 {
				p.errorf("illegal address mode for register pair")
				return
			}
			a.Type = obj.TYPE_REGREG
			a.Offset = int64(r2)
			// Nothing may follow
			return
		}

The other extensions include <code>SXTH</code> (16-bit), <code>SXTW</code> (32-bit), and <code>SXTX</code> (64-bit).
</li>

<li>
<code>(R5, R6)</code>: Register pair for <code>LDAXP</code>/<code>LDP</code>/<code>LDXP</code>/<code>STLXP</code>/<code>STP</code>/<code>STP</code>.
</li>

</ul>

<p>
Reference: <a href="/pkg/cmd/internal/obj/arm64">Go ARM64 Assembly Instructions Reference Manual</a>
</p>