subvti3_test.c revision 2d1fdb26e458c4ddc04155c1d421bced3ba90cd0 
1//===-- subvti3_test.c - Test __subvti3 -----------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file tests __subvti3 for the compiler_rt library.
11//
12//===----------------------------------------------------------------------===//
13
14#include "int_lib.h"
15#include <stdio.h>
16#include <stdlib.h>
17
18#ifdef CRT_HAS_128BIT
19
20// Returns: a - b
21
22// Effects: aborts if a - b overflows
23
24ti_int __subvti3(ti_int a, ti_int b);
25
26int test__subvti3(ti_int a, ti_int b)
27{
28    ti_int x = __subvti3(a, b);
29    ti_int expected = a - b;
30    if (x != expected)
31    {
32        twords at;
33        at.all = a;
34        twords bt;
35        bt.all = b;
36        twords xt;
37        xt.all = x;
38        twords expectedt;
39        expectedt.all = expected;
40        printf("error in test__subvsi3(0x%.16llX%.16llX, 0x%.16llX%.16llX) = "
41               "0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
42               at.s.high, at.s.low, bt.s.high, bt.s.low, xt.s.high, xt.s.low,
43               expectedt.s.high, expectedt.s.low);
44    }
45    return x != expected;
46}
47
48#endif
49
50int main()
51{
52#ifdef CRT_HAS_128BIT
53//     test__subvti3(make_ti(0x8000000000000000LL, 0), 1);  // should abort
54//     test__subvti3(0, make_ti(0x8000000000000000LL, 0));  // should abort
55//     test__subvti3(1, make_ti(0x8000000000000000LL, 0));  // should abort
56//     test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), -1);  // should abort
57//     test__subvti3(-2, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL));  // should abort
58
59    if (test__subvti3(make_ti(0x8000000000000000LL, 0), -1))
60        return 1;
61    if (test__subvti3(make_ti(0x8000000000000000LL, 0), 0))
62        return 1;
63    if (test__subvti3(-1, make_ti(0x8000000000000000LL, 0)))
64        return 1;
65    if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 1))
66        return 1;
67    if (test__subvti3(make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL), 0))
68        return 1;
69    if (test__subvti3(1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
70        return 1;
71    if (test__subvti3(0, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
72        return 1;
73    if (test__subvti3(-1, make_ti(0x7FFFFFFFFFFFFFFFLL, 0xFFFFFFFFFFFFFFFFLL)))
74        return 1;
75
76#else
77    printf("skipped\n");
78#endif
79    return 0;
80}
81