&& s > 64 && s <= 16*64 && s%16 == 0
	&& !config.noDuffDevice && logLargeCopy(v, s) =>
	(DUFFCOPY [8 * (64 - s/16)] dst src mem)
// 8 is the number of bytes to encode:
//
// LDP.P   16(R16), (R26, R27)
// STP.P   (R26, R27), 16(R17)
//
// 64 is number of these blocks. See runtime/duff_arm64.s:duffcopy

// large move uses a loop
(Move [s] dst src mem)
	&& s%16 == 0 && (s > 16*64 || config.noDuffDevice)