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