case 106: // CASPx (Rs, Rs+1), (Rb), (Rt, Rt+1)
		rs := p.From.Reg
		rt := p.GetTo2().Reg
		rb := p.To.Reg
		rs1 := int16(p.From.Offset)
		rt1 := int16(p.GetTo2().Offset)

		enc, ok := atomicCASP[p.As]
		if !ok {
			c.ctxt.Diag("invalid CASP-like atomic instructions: %v\n", p)
		}