1//===-- cmpdi2.c - Implement __cmpdi2 -------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements __cmpdi2 for the compiler_rt library.
10//
11//===----------------------------------------------------------------------===//
12
13#include "int_lib.h"
14
15// Returns: if (a < b) returns 0
16// if (a == b) returns 1
17// if (a > b) returns 2
18
19COMPILER_RT_ABI si_int __cmpdi2(di_int a, di_int b) {
20 dwords x;
21 x.all = a;
22 dwords y;
23 y.all = b;
24 if (x.s.high < y.s.high)
25 return 0;
26 if (x.s.high > y.s.high)
27 return 2;
28 if (x.s.low < y.s.low)
29 return 0;
30 if (x.s.low > y.s.low)
31 return 2;
32 return 1;
33}
34
35#ifdef __ARM_EABI__
36// Returns: if (a < b) returns -1
37// if (a == b) returns 0
38// if (a > b) returns 1
39COMPILER_RT_ABI si_int __aeabi_lcmp(di_int a, di_int b) {
40 return __cmpdi2(a, b) - 1;
41}
42#endif
43

source code of compiler-rt/lib/builtins/cmpdi2.c