o2 = LOP_IRR(opl, uint32(p.To.Reg), uint32(p.To.Reg), uint32(p.From.Offset)&0xFFFF)

	case 22: /* add $lcon/$andcon,r1,r2 ==> oris+ori+add/ori+add, add $s34con,r1 ==> addis+ori+slw+ori+add */
		if p.To.Reg == REGTMP || p.Reg == REGTMP {
			c.ctxt.Diag("can't synthesize large constant\n%v", p)
		}
		d := c.vregoff(&p.From)
		r := int(p.Reg)
		if r == 0 {
			r = int(p.To.Reg)
		}