pkg syscall (freebsd-arm64), const SYS_THR_NEW ideal-int
pkg syscall (freebsd-arm64), const SYS_THR_SELF = 432
pkg syscall (freebsd-arm64), const SYS_THR_SELF ideal-int
pkg syscall (freebsd-arm64), const SYS_THR_SET_NAME = 464
pkg syscall (freebsd-arm64), const SYS_THR_SET_NAME ideal-int
pkg syscall (freebsd-arm64), const SYS_THR_SUSPEND = 442
pkg syscall (freebsd-arm64), const SYS_THR_SUSPEND ideal-int

	// cond: s%16 == 0 && s > 64 && s <= 16*64 && !config.noDuffDevice
	// result: (DUFFZERO [4 * (64 - s/16)] ptr mem)
	for {
		s := auxIntToInt64(v.AuxInt)
		ptr := v_0
		mem := v_1
		if !(s%16 == 0 && s > 64 && s <= 16*64 && !config.noDuffDevice) {
			break
		}
		v.reset(OpARM64DUFFZERO)
		v.AuxInt = int64ToAuxInt(4 * (64 - s/16))
		v.AddArg2(ptr, mem)
		return true
	}