p.From.Class = 0
	p.To.Class = 0

	c := ctxt9{ctxt: ctxt, newprog: newprog}

	// Rewrite BR/BL to symbol as TYPE_BRANCH.
	switch p.As {
	case ABR,
		ABL,
		obj.ARET,
		obj.ADUFFZERO,
		obj.ADUFFCOPY:
		if p.To.Sym != nil {
			p.To.Type = obj.TYPE_BRANCH
		}
	}

	// Rewrite float constants to values stored in memory.
	switch p.As {
	case AFMOVS:

type AddrType uint8

const (
	TYPE_NONE AddrType = iota
	TYPE_BRANCH
	TYPE_TEXTSIZE
	TYPE_MEM
	TYPE_CONST
	TYPE_FCONST
	TYPE_SCONST
	TYPE_REG
	TYPE_ADDR
	TYPE_SHIFT
	TYPE_REGREG
	TYPE_REGREG2
	TYPE_INDIR
	TYPE_REGLIST
	TYPE_SPECIAL
)

func (a *Addr) Target() *Prog {
	if a.Type == TYPE_BRANCH && a.Val != nil {
		return a.Val.(*Prog)
	}
	return nil
}

		return
	default:
		p.errorf("wrong number of arguments to %s instruction", op)
		return
	}
	switch {
	case target.Type == obj.TYPE_BRANCH:
		// JMP 4(PC)
		*targetAddr = obj.Addr{
			Type:   obj.TYPE_BRANCH,
			Offset: p.pc + 1 + target.Offset, // +1 because p.pc is incremented in append, below.
		}
	case target.Type == obj.TYPE_REG:
		// JMP R1
		*targetAddr = *target

			io.WriteString(w, Rconv(int(a.Reg)))
		}
		if (RBaseARM64+1<<10+1<<9) /* arm64.REG_ELEM */ <= a.Reg &&
			a.Reg < (RBaseARM64+1<<11) /* arm64.REG_ELEM_END */ {
			fmt.Fprintf(w, "[%d]", a.Index)
		}

	case TYPE_BRANCH:
		if a.Sym != nil {
			fmt.Fprintf(w, "%s%s(SB)", a.Sym.Name, abiDecorate(a, abiDetail))
		} else if a.Target() != nil {
			fmt.Fprint(w, a.Target().Pc)
		} else {
			fmt.Fprintf(w, "%d(PC)", a.Offset)
		}