C_LACON  // 32-bit offset in auto constant $a(FP)
	C_AECON  // ADDCON offset in extern constant $e(SB)

	// TODO(aram): only one branch class should be enough
	C_SBRA // for TYPE_BRANCH
	C_LBRA

	C_ZAUTO       // 0(RSP)
	C_NSAUTO_16   // -256 <= x < 0, 0 mod 16
	C_NSAUTO_8    // -256 <= x < 0, 0 mod 8
	C_NSAUTO_4    // -256 <= x < 0, 0 mod 4
	C_NSAUTO      // -256 <= x < 0

			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)
		}

					q.Link = p.Link
					p.Link = q
					q.As = AJMP
					q.Pos = p.Pos
					q.To.Type = obj.TYPE_BRANCH
					q.To.SetTarget(p.To.Target())
					p.To.SetTarget(q)
					q = c.newprog()
					q.Link = p.Link
					p.Link = q
					q.As = AJMP
					q.Pos = p.Pos
					q.To.Type = obj.TYPE_BRANCH
					q.To.SetTarget(q.Link.Link)

					c.addnop(p.Link)
					c.addnop(p)
					bflag = 1
				}

					q.Link = p.Link
					p.Link = q
					q.As = AJMP
					q.Pos = p.Pos
					q.To.Type = obj.TYPE_BRANCH
					q.To.SetTarget(p.To.Target())
					p.To.SetTarget(q)
					q = c.newprog()
					q.Link = p.Link
					p.Link = q
					q.As = AJMP
					q.Pos = p.Pos
					q.To.Type = obj.TYPE_BRANCH
					q.To.SetTarget(q.Link.Link)
					rescan = true
				}
			}

			m = int(o.size)

					q = emallocz(sizeof(Prog));
					q->link = p->link;
					p->link = q;
					q->as = AB;
					q->to.type = TYPE_BRANCH;
					q->pcond = p->pcond;
					p->pcond = q;
					q = emallocz(sizeof(Prog));
					q->link = p->link;
					p->link = q;
					q->as = AB;
					q->to.type = TYPE_BRANCH;
					q->pcond = q->link->link;
					bflag = 1;
				}
			}
			*/
			opc = int32(p.Pc)
			m = int(o.size)

				if toofar {
					q := c.newprog()
					q.Link = p.Link
					p.Link = q
					q.As = AB
					q.To.Type = obj.TYPE_BRANCH
					q.To.SetTarget(p.To.Target())
					p.To.SetTarget(q)
					q = c.newprog()
					q.Link = p.Link
					p.Link = q
					q.As = AB
					q.To.Type = obj.TYPE_BRANCH
					q.To.SetTarget(q.Link.Link)
					bflag = 1
				}
			}
			m = o.size(c.ctxt, p)

	}
	switch reg {
	case "FP":
		addr.Name = obj.NAME_PARAM
	case "PC":
		if prefix != 0 {
			p.errorf("illegal addressing mode for PC")
		}
		addr.Type = obj.TYPE_BRANCH // We set the type and leave NAME untouched. See asmJump.
	case "SB":
		addr.Name = obj.NAME_EXTERN
		if isStatic {
			addr.Name = obj.NAME_STATIC
		}
	case "SP":

						q = c.newprog()
						q.Link = p.Link
						p.Link = q
						q.As = ABR
						q.To.Type = obj.TYPE_BRANCH
						q.To.SetTarget(p.To.Target())
						p.To.SetTarget(q)
						q = c.newprog()
						q.Link = p.Link
						p.Link = q
						q.As = ABR
						q.To.Type = obj.TYPE_BRANCH
						q.To.SetTarget(q.Link.Link)
					}
					bflag = 1
				}
			}

			m = int(o.size)

		return
	}

	if ycover[0] == 0 {
		ctxt.Diag("x86 tables not initialized, call x86.instinit first")
	}

	for p := s.Func().Text; p != nil; p = p.Link {
		if p.To.Type == obj.TYPE_BRANCH && p.To.Target() == nil {
			p.To.SetTarget(p)
		}
		if p.As == AADJSP {
			p.To.Type = obj.TYPE_REG
			p.To.Reg = REG_SP
			// Generate 'ADDQ $x, SP' or 'SUBQ $x, SP', with x positive.

			return C_ADDCON
		}
		if c.instoffset&0xffff == 0 && isint32(c.instoffset) {
			return C_UCON
		}
		if isint32(c.instoffset) {
			return C_LCON
		}
		return C_DCON

	case obj.TYPE_BRANCH:
		return C_SBRA
	}

	return C_GOK
}

func (c *ctxtz) oplook(p *obj.Prog) *Optab {
	// Return cached optab entry if available.
	if p.Optab != 0 {
		return &optab[p.Optab-1]
	}