RSB	R0->28, R1           // 401e61e0
	RSB	R0@>28, R1           // 601e61e0
	RSB.S	R0<<28, R1           // 001e71e0
	RSB.S	R0>>28, R1           // 201e71e0
	RSB.S	R0->28, R1           // 401e71e0
	RSB.S	R0@>28, R1           // 601e71e0
	RSB	R0<<R1, R2, R3       // 103162e0
	RSB	R0>>R1, R2, R3       // 303162e0
	RSB	R0->R1, R2, R3       // 503162e0
	RSB	R0@>R1, R2, R3       // 703162e0

	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"