1// SPDX-License-Identifier: GPL-2.0
 2#include <linux/module.h>
 3
 4union ull_union {
 5	unsigned long long ull;
 6	struct {
 7		unsigned int high;
 8		unsigned int low;
 9	} ui;
10};
11
12int __ucmpdi2(unsigned long long a, unsigned long long b)
13{
14	union ull_union au = {.ull = a};
15	union ull_union bu = {.ull = b};
16
17	if (au.ui.high < bu.ui.high)
18		return 0;
19	else if (au.ui.high > bu.ui.high)
20		return 2;
21	if (au.ui.low < bu.ui.low)
22		return 0;
23	else if (au.ui.low > bu.ui.low)
24		return 2;
25	return 1;
26}