}

func testBadOperandParser(t *testing.T, parser *Parser, tests []badOperandTest) {
	for _, test := range tests {
		err := tryParse(t, func() {
			parser.start(lex.Tokenize(test.input))
			addr := obj.Addr{}
			parser.operand(&addr)
		})

		switch {
		case err == nil:
			t.Errorf("fail at %s: got no errors; expected %s\n", test.input, test.error)
		case !strings.Contains(err.Error(), test.error):

</p>

<p>
Except for <a href="#Constants">untyped strings</a>, if the sliced operand is a string or slice,
the result of the slice operation is a non-constant value of the same type as the operand.
For untyped string operands the result is a non-constant value of type <code>string</code>.
If the sliced operand is an array, it must be <a href="#Address_operators">addressable</a>

		{"TEXT", "1, 1", "TEXT symbol \"<erroneous symbol>\" must be a symbol(SB)"},
		{"TEXT", "$\"foo\", 0, $1", "TEXT symbol \"<erroneous symbol>\" must be a symbol(SB)"},
		{"TEXT", "$0É:0, 0, $1", "expected end of operand, found É"}, // Issue #12467.
		{"TEXT", "$:0:(SB, 0, $1", "expected '(', found 0"},          // Issue 12468.
		{"TEXT", "@B(SB),0,$0", "expected '(', found B"},             // Issue 23580.

	VMOVQ (AX), X20           // 62e1fd086e20 or 62e1fe087e20
	VMOVQ 7(DX), X20          // 62e1fd086ea207000000 or 62e1fe087ea207000000
	VMOVQ -15(R11)(CX*1), X20 // 62c1fd086ea40bf1ffffff or 62c1fe087ea40bf1ffffff
	VMOVQ (SP)(AX*2), X20     // 62e1fd086e2444 or 62e1fe087e2444
	// "VMOVQ xmm1, r/m64"/7E vs "VMOVQ xmm1, xmm2/m64"/D6 with mem operand.

			fmt.Fprintf(w, "ref %s %s\n", name, abi)
		}
	}
}

func (p *Parser) start(operand []lex.Token) {
	p.input = operand
	p.inputPos = 0
}

// address parses the operand into a link address structure.
func (p *Parser) address(operand []lex.Token) obj.Addr {
	p.start(operand)
	addr := obj.Addr{}
	p.operand(&addr)
	return addr
}

// parseScale converts a decimal string into a valid scale factor.

resulting operand is an <a href="#Instantiations">instantiated</a> function.
</p>

<p>
The <a href="#Blank_identifier">blank identifier</a> may appear as an
operand only on the left-hand side of an <a href="#Assignment_statements">assignment statement</a>.
</p>

<p>
Implementation restriction: A compiler need not report an error if an operand's

	// Unsupported broadcast.
	VFPCLASSSD.BCST $0, (AX), K2, K1 // ERROR "unsupported broadcast"
	VFPCLASSSS.BCST $0, (AX), K2, K1 // ERROR "unsupported broadcast"
	// Broadcast without memory operand.
	VADDPD.BCST X3, X2, K1, X1       // ERROR "illegal broadcast without memory argument"
	VADDPD.BCST X3, X2, K1, X1       // ERROR "illegal broadcast without memory argument"

	VMOV	V8.D[0], V12.S[1]                                // ERROR "operand mismatch"
	VMOV	V8.D[0], V12.H[1]                                // ERROR "operand mismatch"
	VMOV	V8.D[0], V12.B[1]                                // ERROR "operand mismatch"
	VMOV	V8.S[0], V12.H[1]                                // ERROR "operand mismatch"
	VMOV	V8.S[0], V12.B[1]                                // ERROR "operand mismatch"

	p.patch()
	p.labels = make(map[string]*obj.Prog)

	// Operand 0 is the symbol name in the form foo(SB).
	// That means symbol plus indirect on SB and no offset.
	nameAddr := p.address(operands[0])
	if !p.validSymbol("TEXT", &nameAddr, false) {
		return
	}
	name := symbolName(&nameAddr)
	next := 1

	// Next operand is the optional text flag, a literal integer.
	var flag = int64(0)

		(1 << 4) /* must be set */
	return offset, arm.AMRC, true
}

// IsARMMULA reports whether the op (as defined by an arm.A* constant) is
// MULA, MULS, MMULA, MMULS, MULABB, MULAWB or MULAWT, the 4-operand instructions.
func IsARMMULA(op obj.As) bool {
	switch op {
	case arm.AMULA, arm.AMULS, arm.AMMULA, arm.AMMULS, arm.AMULABB, arm.AMULAWB, arm.AMULAWT:
		return true
	}
	return false
}