prog.To = a[2]
		case sys.Loong64:
			prog.From = a[0]
			prog.Reg = p.getRegister(prog, op, &a[1])
			prog.To = a[2]
		case sys.ARM:
			// Special cases.
			if arch.IsARMSTREX(op) {
				/*
					STREX x, (y), z
						from=(y) reg=x to=z
				*/
				prog.From = a[1]
				prog.Reg = p.getRegister(prog, op, &a[0])
				prog.To = a[2]
				break
			}
			if arch.IsARMBFX(op) {

	MOVM	[R2-R5], (R1) // MOVM [R2,R3,R4,R5], (R1)
	MOVM	[R2], (R1)

//
// SWAP
//
//	LTYPE9 cond reg ',' ireg ',' reg
//	{
//		outcode($1, $2, &$5, int32($3.Reg), &$7);
//	}
	STREX	R1, (R2), R3 // STREX (R2), R1, R3

//
// word
//
//	LTYPEH comma ximm
//	{
//		outcode($1, Always, &nullgen, 0, &$3);
//	}
	WORD	$1234

//
// floating-point coprocessor
//