// LDP <Xt>, <Xt2>, [<Xn|SP>], #<imm_3>
	{0xffc00000, 0xa8c00000, LDP, instArgs{arg_Xt, arg_Xt2, arg_Xns_mem_post_imm7_8_signed}, nil},
	// LDP <Wt>, <Wt2>, [<Xn|SP>{, #<imm_1>}]!
	{0xffc00000, 0x29c00000, LDP, instArgs{arg_Wt, arg_Wt2, arg_Xns_mem_wb_imm7_4_signed}, nil},
	// LDP <Xt>, <Xt2>, [<Xn|SP>{, #<imm_3>}]!

	OP_RLDCL    = 30<<26 | 8<<1 | 0<<10 | 0
	OP_EXTSWSLI = 31<<26 | 445<<2
	OP_SETB     = 31<<26 | 128<<1
)

func pfxadd(rt, ra int16, r uint32, imm32 int64) (uint32, uint32) {
	return AOP_PFX_10_MLS(r, uint32(imm32>>16)), AOP_IRR(14<<26, uint32(rt), uint32(ra), uint32(imm32))
}

func pfxload(a obj.As, reg int16, base int16, r uint32) (uint32, uint32) {
	switch a {
	case AMOVH: