return 2
	default:
		panic("bad BoundsKind")
	}
}

// arm64BitField is the GO type of ARM64BitField auxInt.
// if x is an ARM64BitField, then width=x&0xff, lsb=(x>>8)&0xff, and
// width+lsb<64 for 64-bit variant, width+lsb<32 for 32-bit variant.
// the meaning of width and lsb are instruction-dependent.

		v.Fatalf("op %s doesn't have a ValAndOff aux field", v.Op)
	}
	return ValAndOff(v.AuxInt)
}

func (v *Value) AuxArm64BitField() arm64BitField {
	if opcodeTable[v.Op].auxType != auxARM64BitField {
		v.Fatalf("op %s doesn't have a ARM64BitField aux field", v.Op)
	}
	return arm64BitField(v.AuxInt)
}

// long form print.  v# = opcode <type> [aux] args [: reg] (names)
func (v *Value) LongString() string {
	if v == nil {

func armBFAuxInt(lsb, width int64) arm64BitField {
	if lsb < 0 || lsb > 63 {
		panic("ARM(64) bit field lsb constant out of range")
	}
	if width < 1 || lsb+width > 64 {
		panic("ARM(64) bit field width constant out of range")
	}
	return arm64BitField(width | lsb<<8)
}

// returns the lsb part of the auxInt field of arm64 bitfield ops.
func (bfc arm64BitField) getARM64BFlsb() int64 {

		{name: "BFI", argLength: 2, reg: gp21nog, asm: "BFI", aux: "ARM64BitField", resultInArg0: true},
		// extract width bits of arg1 starting at bit lsb and insert at low end of result, copy other bits from arg0
		{name: "BFXIL", argLength: 2, reg: gp21nog, asm: "BFXIL", aux: "ARM64BitField", resultInArg0: true},

	case "SymValAndOff":
		return "ValAndOff"
	case "TypSize":
		return "int64"
	case "CCop":
		return "Op"
	case "FlagConstant":
		return "flagConstant"
	case "ARM64BitField":
		return "arm64BitField"
	default:
		return "invalid"
	}
}

// auxType returns the Go type that this block should store in its aux field.
func (b blockData) auxType() string {
	switch b.aux {