1// SPDX-License-Identifier: GPL-2.0
2#include <linux/module.h>
3#include <linux/libgcc.h>
4
5union ull_union {
6 unsigned long long ull;
7 struct {
8 unsigned int high;
9 unsigned int low;
10 } ui;
11};
12
13word_type __ucmpdi2(unsigned long long a, unsigned long long b)
14{
15 union ull_union au = {.ull = a};
16 union ull_union bu = {.ull = b};
17
18 if (au.ui.high < bu.ui.high)
19 return 0;
20 else if (au.ui.high > bu.ui.high)
21 return 2;
22 if (au.ui.low < bu.ui.low)
23 return 0;
24 else if (au.ui.low > bu.ui.low)
25 return 2;
26 return 1;
27}
28

source code of linux/arch/parisc/lib/ucmpdi2.c