{name: "MoveWB", argLength: 3, typ: "Mem", aux: "TypSize"}, // arg0=destptr, arg1=srcptr, arg2=mem, auxint=size, aux=type.  Returns memory.
	{name: "ZeroWB", argLength: 2, typ: "Mem", aux: "TypSize"}, // arg0=destptr, arg1=mem, auxint=size, aux=type. Returns memory.
	{name: "WBend", argLength: 1, typ: "Mem"},                  // Write barrier code is done, interrupting is now allowed.

		auxType: auxTyp,
		argLen:  3,
		generic: true,
	},
	{
		name:    "MoveWB",
		auxType: auxTypSize,
		argLen:  3,
		generic: true,
	},
	{
		name:    "ZeroWB",
		auxType: auxTypSize,
		argLen:  2,
		generic: true,
	},
	{
		name:    "WBend",
		argLen:  1,
		generic: true,
	},
	{
		name:    "WB",
		auxType: auxInt64,