MOVD	(R3)(R7.SXTX<<2), R8                             // ERROR "invalid index shift amount"
	MOVWU	(R5)(R4.UXTW<<3), R10                            // ERROR "invalid index shift amount"
	MOVWU	(R5)(R4<<1), R10                                 // ERROR "invalid index shift amount"
	MOVB	(R5)(R4.SXTW<<5), R10                            // ERROR "invalid index shift amount"

	// Note that there is no list of names as there is for x86.
	for i := arm.REG_R0; i < arm.REG_SPSR; i++ {
		register[obj.Rconv(i)] = int16(i)
	}
	// Avoid unintentionally clobbering g using R10.
	delete(register, "R10")
	register["g"] = arm.REG_R10
	for i := 0; i < 16; i++ {
		register[fmt.Sprintf("C%d", i)] = int16(i)
	}

	// Pseudo-registers.
	register["SB"] = RSB
	register["FP"] = RFP

	p.expectOperandEnd()
	return
}

// atStartOfRegister reports whether the parser is at the start of a register definition.
func (p *Parser) atStartOfRegister(name string) bool {
	// Simple register: R10.
	_, present := p.arch.Register[name]
	if present {
		return true
	}
	// Parenthesized register: R(10).
	return p.arch.RegisterPrefix[name] && p.peek() == '('
}

		Type:  obj.TYPE_BRANCH,
		Index: 0,
	}
	addr.Val = target
}

func isARM64SVE(op obj.As) bool {
	return op > arm64.ASVESTART
}

// asmInstruction assembles an instruction.
// MOVW R9, (R10)
func (p *Parser) asmInstruction(op obj.As, cond string, a []obj.Addr) {
	// fmt.Printf("%s %+v\n", op, a)
	prog := &obj.Prog{
		Ctxt: p.ctxt,
		Pos:  p.pos(),
		As:   op,
	}
	switch len(a) {
	case 0: