register["LO"] = mips.REG_LO
	// Pseudo-registers.
	register["SB"] = RSB
	register["FP"] = RFP
	register["PC"] = RPC
	// Avoid unintentionally clobbering g using R30.
	delete(register, "R30")
	register["g"] = mips.REG_R30
	// Avoid unintentionally clobbering RSB using R28.
	delete(register, "R28")
	register["RSB"] = mips.REG_R28
	registerPrefix := map[string]bool{
		"F":   true,
		"FCR": true,

	CMP.S	R1, R2	           // ERROR "invalid .S suffix"
	BIC.P	$124, R1, R2       // ERROR "invalid .P suffix"
	MOVW.S	$124, R1           // ERROR "invalid .S suffix"
	MVN.S	$123, g            // ERROR "invalid .S suffix"
	RSB.U	$0, R9             // ERROR "invalid .U suffix"
	CMP.S	$29, g             // ERROR "invalid .S suffix"
	ADD.W	R1<<R2, R3         // ERROR "invalid .W suffix"
	SUB.U	R1<<R2, R3, R9     // ERROR "invalid .U suffix"

	{"R3", "R3"},
	{"R31", "R31"},
	{"R4", "R4"},
	{"R5", "R5"},
	{"R6", "R6"},
	{"R7", "R7"},
	{"R8", "R8"},
	{"R9", "R9"},
	{"LO", "LO"},
	{"a(FP)", "a(FP)"},
	{"g", "g"},
	{"RSB", "R28"},
	{"ret+8(FP)", "ret+8(FP)"},
	{"runtime·abort(SB)", "runtime.abort(SB)"},
	{"·AddUint32(SB)", "pkg.AddUint32(SB)"},
	{"·trunc(SB)", "pkg.trunc(SB)"},