1 //===-- fixdfti_test.c - Test __fixdfti -----------------------------------===//
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 __fixdfti for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #if __x86_64
15 
16 #include "int_lib.h"
17 #include <stdio.h>
18 
19 // Returns: convert a to a signed long long, rounding toward zero.
20 
21 // Assumption: double is a IEEE 64 bit floating point type
22 //             su_int is a 32 bit integral type
23 //             value in double is representable in ti_int (no range checking performed)
24 
25 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
26 
27 ti_int __fixdfti(double a);
28 
29 int test__fixdfti(double a, ti_int expected)
30 {
31     ti_int x = __fixdfti(a);
32     if (x != expected)
33     {
34         twords xt;
35         xt.all = x;
36         twords expectedt;
37         expectedt.all = expected;
38         printf("error in __fixdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
39         a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
40     }
41     return x != expected;
42 }
43 
44 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
45 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
46 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
47 
48 #endif
49 
50 int main()
51 {
52 #if __x86_64
53     if (test__fixdfti(0.0, 0))
54         return 1;
55 
56     if (test__fixdfti(0.5, 0))
57         return 1;
58     if (test__fixdfti(0.99, 0))
59         return 1;
60     if (test__fixdfti(1.0, 1))
61         return 1;
62     if (test__fixdfti(1.5, 1))
63         return 1;
64     if (test__fixdfti(1.99, 1))
65         return 1;
66     if (test__fixdfti(2.0, 2))
67         return 1;
68     if (test__fixdfti(2.01, 2))
69         return 1;
70     if (test__fixdfti(-0.5, 0))
71         return 1;
72     if (test__fixdfti(-0.99, 0))
73         return 1;
74     if (test__fixdfti(-1.0, -1))
75         return 1;
76     if (test__fixdfti(-1.5, -1))
77         return 1;
78     if (test__fixdfti(-1.99, -1))
79         return 1;
80     if (test__fixdfti(-2.0, -2))
81         return 1;
82     if (test__fixdfti(-2.01, -2))
83         return 1;
84 
85     if (test__fixdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
86         return 1;
87     if (test__fixdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
88         return 1;
89 
90     if (test__fixdfti(-0x1.FFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
91                                                0x8000008000000000LL)))
92         return 1;
93     if (test__fixdfti(-0x1.FFFFFCp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
94                                                0x8000010000000000LL)))
95         return 1;
96 
97     if (test__fixdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
98         return 1;
99     if (test__fixdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
100         return 1;
101 
102     if (test__fixdfti(-0x1.FFFFFFFFFFFFFp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
103                                                       0x8000000000000400LL)))
104         return 1;
105     if (test__fixdfti(-0x1.FFFFFFFFFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
106                                                       0x8000000000000800LL)))
107         return 1;
108 
109     if (test__fixdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00LL, 0)))
110         return 1;
111     if (test__fixdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800LL, 0)))
112         return 1;
113 
114     if (test__fixdfti(-0x1.FFFFFFFFFFFFFp+126, make_ti(0x8000000000000400LL, 0)))
115         return 1;
116     if (test__fixdfti(-0x1.FFFFFFFFFFFFEp+126, make_ti(0x8000000000000800LL, 0)))
117         return 1;
118 
119 #else
120     printf("skipped\n");
121 #endif
122    return 0;
123 }
124