}

		f := strings.Fields(string(buf))

		// Turn relative (PC) into absolute (PC) automatically,
		// so that most branch instructions don't need comments
		// giving the absolute form.
		if len(f) > 0 && strings.Contains(printed, "(PC)") {
			index := len(f) - 1
			suf := "(PC)"
			for !strings.HasSuffix(f[index], suf) {
				index--
				suf = "(PC),"
			}
			str := f[index]

	// Create maps for easy lookup of instruction names etc.
	for i, s := range x86.Register {
		register[s] = int16(i + x86.REG_AL)
	}
	// Pseudo-registers.
	register["SB"] = RSB
	register["FP"] = RFP
	register["PC"] = RPC
	if linkArch == &x86.Linkamd64 {
		// Alias g to R14
		register["g"] = x86.REGG
	}
	// Register prefix not used on this architecture.

	instructions := make(map[string]obj.As)

	// Branch pseudo-instructions
	BEQZ	X5, 2(PC)				// 63840200
	BGEZ	X5, 2(PC)				// 63d40200
	BGT	X5, X6, 2(PC)				// 63445300
	BGTU	X5, X6, 2(PC)				// 63645300
	BGTZ	X5, 2(PC)				// 63445000
	BLE	X5, X6, 2(PC)				// 63545300
	BLEU	X5, X6, 2(PC)				// 63745300
	BLEZ	X5, 2(PC)				// 63545000
	BLTZ	X5, 2(PC)				// 63c40200
	BNEZ	X5, 2(PC)				// 63940200

	// Set pseudo-instructions

	errorLine     int   // Line number of last error.
	errorCount    int   // Number of errors.
	sawCode       bool  // saw code in this file (as opposed to comments and blank lines)
	pc            int64 // virtual PC; count of Progs; doesn't advance for GLOBL or DATA.
	input         []lex.Token
	inputPos      int
	pendingLabels []string // Labels to attach to next instruction.
	labels        map[string]*obj.Prog

	ROTRV	$4, R4			// 84104d00
	SYSCALL				// 00002b00
	BEQ	R4, R5, 1(PC)		// 85040058
	BEQ	R4, 1(PC)		// 80040040
	BEQ	R4, R0, 1(PC)		// 80040040
	BEQ	R0, R4, 1(PC)		// 80040040
	BNE	R4, R5, 1(PC)		// 8504005c
	BNE	R4, 1(PC)		// 80040044
	BNE	R4, R0, 1(PC)		// 80040044
	BNE	R0, R4, 1(PC)		// 80040044
	BLTU	R4, 1(PC)		// 80040068
	MOVF	y+8(FP), F4		// 6440002b
	MOVD	y+8(FP), F4		// 6440802b

	BL	1(PC)      // CALL 1(PC)
	BL	(R2)       // CALL (R2)
	BL	foo(SB)    // CALL foo(SB)
	BL	bar<>(SB)  // CALL bar<>(SB)
	B	foo(SB)    // JMP foo(SB)
	BEQ	1(PC)
	BEQ	2(PC)
	TBZ	$1, R1, 2(PC)
	TBNZ	$2, R2, 2(PC)
	JMP	foo(SB)
	CALL	foo(SB)

// ADR
	ADR	next, R11     // ADR R11 // 2b000010
next:
	NOP
	ADR -2(PC), R10    // 0a000010
	ADR 2(PC), R16     // 10000010

	MayMoreStack         string `help:"call named function before all stack growth checks"`
	PCTab                string `help:"print named pc-value table\nOne of: pctospadj, pctofile, pctoline, pctoinline, pctopcdata"`
}

var (
	D        MultiFlag
	I        MultiFlag
	PrintOut int
	DebugV   bool
)

func init() {

while the second refers to the
hardware's <code>SP</code> register.
</p>

<p>
On machines where <code>SP</code> and <code>PC</code> are
traditionally aliases for a physical, numbered register,
in the Go assembler the names <code>SP</code> and <code>PC</code>
are still treated specially;
for instance, references to <code>SP</code> require a symbol,
much like <code>FP</code>.

	}
	return args, tokens
}

// invokeMacro pushes onto the input Stack a Slice that holds the macro definition with the actual
// parameters substituted for the formals.
// Invoking a macro does not touch the PC/line history.
func (in *Input) invokeMacro(macro *Macro) {
	// If the macro has no arguments, just substitute the text.
	if macro.args == nil {
		in.Push(NewSlice(in.Base(), in.Line(), macro.tokens))
		return
	}

	CJR	X10, X11				// ERROR "expected no register in rs2"
	CJALR	X0					// ERROR "cannot use register X0 in rs1"
	CJALR	X10, X11				// ERROR "expected no register in rd"
	CBEQZ	X5, 1(PC)				// ERROR "expected integer prime register in rs1"
	CBNEZ	X5, 1(PC)				// ERROR "expected integer prime register in rs1"
	CLI	$3, X0					// ERROR "cannot use register X0 in rd"
	CLI	$-33, X5				// ERROR "must be in range [-32, 31]"