xref: /OK3568_Linux_fs/kernel/arch/parisc/lib/ucmpdi2.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/module.h>
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun union ull_union {
5*4882a593Smuzhiyun 	unsigned long long ull;
6*4882a593Smuzhiyun 	struct {
7*4882a593Smuzhiyun 		unsigned int high;
8*4882a593Smuzhiyun 		unsigned int low;
9*4882a593Smuzhiyun 	} ui;
10*4882a593Smuzhiyun };
11*4882a593Smuzhiyun 
__ucmpdi2(unsigned long long a,unsigned long long b)12*4882a593Smuzhiyun int __ucmpdi2(unsigned long long a, unsigned long long b)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun 	union ull_union au = {.ull = a};
15*4882a593Smuzhiyun 	union ull_union bu = {.ull = b};
16*4882a593Smuzhiyun 
17*4882a593Smuzhiyun 	if (au.ui.high < bu.ui.high)
18*4882a593Smuzhiyun 		return 0;
19*4882a593Smuzhiyun 	else if (au.ui.high > bu.ui.high)
20*4882a593Smuzhiyun 		return 2;
21*4882a593Smuzhiyun 	if (au.ui.low < bu.ui.low)
22*4882a593Smuzhiyun 		return 0;
23*4882a593Smuzhiyun 	else if (au.ui.low > bu.ui.low)
24*4882a593Smuzhiyun 		return 2;
25*4882a593Smuzhiyun 	return 1;
26*4882a593Smuzhiyun }
27