ab.asmandsz(ctxt, cursym, p, &p.To, reg[p.GetFrom3().Reg], regrex[p.GetFrom3().Reg], 0)
						ab.Put1(byte(p.From.Offset))

					case obj.TYPE_REG:
						switch p.From.Reg {
						default:
							goto bad

						case REG_CL, REG_CX:
							ab.Put2(0x0f, t[1])
							ab.asmandsz(ctxt, cursym, p, &p.To, reg[p.GetFrom3().Reg], regrex[p.GetFrom3().Reg], 0)
						}
					}

	go doReq("req1")
	<-preDial
	<-dialStarted

	// get req2 to waiting on conns per host to go down below max
	go doReq("req2")
	<-preDial
	select {
	case <-dialStarted:
		t.Error("req2 dial started while req1 dial in progress")
		return
	default:
	}

	// let req1 complete
	stallDial <- struct{}{}
	<-reqComplete

	// let req2 complete
	<-dialStarted
	stallDial <- struct{}{}