1 //===-- floatdidf.c - Test __floatdidf ------------------------------------===//
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 __floatdidf for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "int_lib.h"
15 #include <float.h>
16 #include <stdio.h>
17 
18 // Returns: convert a to a double, rounding toward even.
19 
20 // Assumption: double is a IEEE 64 bit floating point type
21 //             di_int is a 64 bit integral type
22 
23 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
24 
25 double __floatdidf(di_int a);
26 
test__floatdidf(di_int a,double expected)27 int test__floatdidf(di_int a, double expected)
28 {
29     double x = __floatdidf(a);
30     if (x != expected)
31         printf("error in __floatdidf(%llX) = %a, expected %a\n", a, x, expected);
32     return x != expected;
33 }
34 
35 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
36 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
37 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
38 
main()39 int main()
40 {
41     if (test__floatdidf(0, 0.0))
42         return 1;
43 
44     if (test__floatdidf(1, 1.0))
45         return 1;
46     if (test__floatdidf(2, 2.0))
47         return 1;
48     if (test__floatdidf(20, 20.0))
49         return 1;
50     if (test__floatdidf(-1, -1.0))
51         return 1;
52     if (test__floatdidf(-2, -2.0))
53         return 1;
54     if (test__floatdidf(-20, -20.0))
55         return 1;
56 
57     if (test__floatdidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
58         return 1;
59     if (test__floatdidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
60         return 1;
61     if (test__floatdidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
62         return 1;
63     if (test__floatdidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
64         return 1;
65 
66     if (test__floatdidf(0x8000008000000000LL, -0x1.FFFFFEp+62))
67         return 1;
68     if (test__floatdidf(0x8000000000000800LL, -0x1.FFFFFFFFFFFFEp+62))
69         return 1;
70     if (test__floatdidf(0x8000010000000000LL, -0x1.FFFFFCp+62))
71         return 1;
72     if (test__floatdidf(0x8000000000001000LL, -0x1.FFFFFFFFFFFFCp+62))
73         return 1;
74 
75     if (test__floatdidf(0x8000000000000000LL, -0x1.000000p+63))
76         return 1;
77     if (test__floatdidf(0x8000000000000001LL, -0x1.000000p+63))
78         return 1;
79 
80     if (test__floatdidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
81         return 1;
82 
83     if (test__floatdidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
84         return 1;
85     if (test__floatdidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
86         return 1;
87     if (test__floatdidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
88         return 1;
89     if (test__floatdidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
90         return 1;
91     if (test__floatdidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
92         return 1;
93 
94     if (test__floatdidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
95         return 1;
96     if (test__floatdidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
97         return 1;
98     if (test__floatdidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
99         return 1;
100     if (test__floatdidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
101         return 1;
102     if (test__floatdidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
103         return 1;
104 
105     if (test__floatdidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
106         return 1;
107     if (test__floatdidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
108         return 1;
109     if (test__floatdidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
110         return 1;
111     if (test__floatdidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
112         return 1;
113     if (test__floatdidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
114         return 1;
115     if (test__floatdidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
116         return 1;
117     if (test__floatdidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
118         return 1;
119     if (test__floatdidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
120         return 1;
121     if (test__floatdidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
122         return 1;
123     if (test__floatdidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
124         return 1;
125     if (test__floatdidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
126         return 1;
127     if (test__floatdidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
128         return 1;
129     if (test__floatdidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
130         return 1;
131     if (test__floatdidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
132         return 1;
133     if (test__floatdidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
134         return 1;
135 
136    return 0;
137 }
138