1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_divmodti4
3// REQUIRES: int128
4//===-- divmodti4_test.c - Test __divmodti4 -------------------------------===//
5//
6// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
7// See https://llvm.org/LICENSE.txt for license information.
8// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
9//
10//===----------------------------------------------------------------------===//
11//
12// This file tests __divmodti4 for the compiler_rt library.
13//
14//===----------------------------------------------------------------------===//
15
16#include "int_lib.h"
17#include <stdio.h>
18
19#ifdef CRT_HAS_128BIT
20
21// Effects: if rem != 0, *rem = a % b
22// Returns: a / b
23
24COMPILER_RT_ABI ti_int __divmodti4(ti_int a, ti_int b, ti_int* rem);
25
26int test__divmodti4(ti_int a, ti_int b, ti_int expected_q, ti_int expected_r) {
27 ti_int r;
28 ti_int q = __divmodti4(a, b, &r);
29 if (q != expected_q || r != expected_r)
30 {
31 utwords at;
32 at.all = a;
33 utwords bt;
34 bt.all = b;
35 utwords expected_qt;
36 expected_qt.all = expected_q;
37 utwords expected_rt;
38 expected_rt.all = expected_r;
39 utwords qt;
40 qt.all = q;
41 utwords rt;
42 rt.all = r;
43 printf("error in __divmodti4: 0x%.16llX%.16llX / 0x%.16llX%.16llX = "
44 "0x%.16llX%.16llX, R = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX, "
45 "0x%.16llX%.16llX\n",
46 at.s.high, at.s.low, bt.s.high, bt.s.low, qt.s.high, qt.s.low,
47 rt.s.high, rt.s.low, expected_qt.s.high, expected_qt.s.low,
48 expected_rt.s.high, expected_rt.s.low);
49 }
50 return !(q == expected_q && r == expected_r);
51}
52
53char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
54
55tu_int tests[][4] =
56{
57{ (ti_int) 0, (ti_int) 1, (ti_int) 0, (ti_int) 0 },
58{ (ti_int) 0, (ti_int)-1, (ti_int) 0, (ti_int) 0 },
59{ (ti_int) 2, (ti_int) 1, (ti_int) 2, (ti_int) 0 },
60{ (ti_int) 2, (ti_int)-1, (ti_int)-2, (ti_int) 0 },
61{ (ti_int)-2, (ti_int) 1, (ti_int)-2, (ti_int) 0 },
62{ (ti_int)-2, (ti_int)-1, (ti_int) 2, (ti_int) 0 },
63{ (ti_int) 5, (ti_int) 3, (ti_int) 1, (ti_int) 2 },
64{ (ti_int) 5, (ti_int)-3, (ti_int)-1, (ti_int) 2 },
65{ (ti_int)-5, (ti_int) 3, (ti_int)-1, (ti_int)-2 },
66{ (ti_int)-5, (ti_int)-3, (ti_int) 1, (ti_int)-2 },
67{ (ti_int)0x8000000000000000LL << 64 | 0, (ti_int) 1, (ti_int)0x8000000000000000LL << 64 | 0, (ti_int)0x0LL },
68{ (ti_int)0x8000000000000000LL << 64 | 0, (ti_int)-1, (ti_int)0x8000000000000000LL << 64 | 0, (ti_int)0x0LL },
69{ (ti_int)0x8000000000000000LL << 64 | 0, (ti_int)-2, (ti_int)0x4000000000000000LL << 64 | 0, (ti_int)0x0LL },
70{ (ti_int)0x8000000000000000LL << 64 | 0, (ti_int) 2, (ti_int)0xC000000000000000LL << 64 | 0, (ti_int)0x0LL },
71{ (ti_int)0x8000000000000000LL << 64 | 0, (ti_int)-3, (ti_int)0x2AAAAAAAAAAAAAAALL << 64 | 0xAAAAAAAAAAAAAAAALL, (ti_int)-2 },
72{ (ti_int)0x8000000000000000LL << 64 | 0, (ti_int) 3, (ti_int)0xD555555555555555LL << 64 | 0x5555555555555556LL, (ti_int)-2 },
73};
74
75#endif
76
77int main()
78{
79#ifdef CRT_HAS_128BIT
80 const unsigned N = sizeof(tests) / sizeof(tests[0]);
81 unsigned i;
82 for (i = 0; i < N; ++i)
83 if (test__divmodti4(tests[i][0], tests[i][1], tests[i][2], tests[i][3]))
84 return 1;
85
86
87#else
88 printf("skipped\n");
89#endif
90 return 0;
91}
92