v &^= 03
		}

		if v < -(1<<16) || v >= 1<<15 {
			c.ctxt.Diag("branch too far\n%v", p)
		}
		o1 = OP_BC(c.opirr(p.As), uint32(a), uint32(r), uint32(v), 0)

	case 18: /* br/bl (lr/ctr); bc/bcl bo,bi,(lr/ctr) */
		var v int32
		var bh uint32 = 0
		if p.As == ABC || p.As == ABCL {
			v = c.regoff(&p.From) & 31
		} else {
			v = 20 /* unconditional */
		}
		r := int(p.Reg)
		if r == 0 {