1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatundidf
3 //===-- floatundidf_test.c - Test __floatundidf ---------------------------===//
4 //
5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
6 // See https://llvm.org/LICENSE.txt for license information.
7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //
9 //===----------------------------------------------------------------------===//
10 //
11 // This file tests __floatundidf for the compiler_rt library.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "int_lib.h"
16 #include <float.h>
17 #include <stdio.h>
18 
19 // Returns: convert a to a double, rounding toward even.
20 
21 // Assumption: double is a IEEE 64 bit floating point type
22 //             du_int is a 64 bit integral type
23 
24 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
25 
26 COMPILER_RT_ABI double __floatundidf(du_int a);
27 
28 int test__floatundidf(di_int a, double expected)
29 {
30     double x = __floatundidf(a);
31     if (x != expected)
32         printf("error in __floatundidf(%llX) = %a, expected %a\n",
33                a, x, expected);
34     return x != expected;
35 }
36 
37 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
38 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
39 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
40 
41 int main()
42 {
43     if (test__floatundidf(0, 0.0))
44         return 1;
45 
46     if (test__floatundidf(1, 1.0))
47         return 1;
48     if (test__floatundidf(2, 2.0))
49         return 1;
50     if (test__floatundidf(20, 20.0))
51         return 1;
52 
53     if (test__floatundidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
54         return 1;
55     if (test__floatundidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
56         return 1;
57     if (test__floatundidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
58         return 1;
59     if (test__floatundidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
60         return 1;
61 
62     if (test__floatundidf(0x8000008000000000LL, 0x1.000001p+63))
63         return 1;
64     if (test__floatundidf(0x8000000000000800LL, 0x1.0000000000001p+63))
65         return 1;
66     if (test__floatundidf(0x8000010000000000LL, 0x1.000002p+63))
67         return 1;
68     if (test__floatundidf(0x8000000000001000LL, 0x1.0000000000002p+63))
69         return 1;
70 
71     if (test__floatundidf(0x8000000000000000LL, 0x1p+63))
72         return 1;
73     if (test__floatundidf(0x8000000000000001LL, 0x1p+63))
74         return 1;
75 
76     if (test__floatundidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
77         return 1;
78 
79     if (test__floatundidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
80         return 1;
81     if (test__floatundidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
82         return 1;
83     if (test__floatundidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
84         return 1;
85     if (test__floatundidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
86         return 1;
87     if (test__floatundidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
88         return 1;
89 
90     if (test__floatundidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
91         return 1;
92     if (test__floatundidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
93         return 1;
94     if (test__floatundidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
95         return 1;
96     if (test__floatundidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
97         return 1;
98     if (test__floatundidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
99         return 1;
100 
101     if (test__floatundidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
102         return 1;
103     if (test__floatundidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
104         return 1;
105     if (test__floatundidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
106         return 1;
107     if (test__floatundidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
108         return 1;
109     if (test__floatundidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
110         return 1;
111     if (test__floatundidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
112         return 1;
113     if (test__floatundidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
114         return 1;
115     if (test__floatundidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
116         return 1;
117     if (test__floatundidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
118         return 1;
119     if (test__floatundidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
120         return 1;
121     if (test__floatundidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
122         return 1;
123     if (test__floatundidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
124         return 1;
125     if (test__floatundidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
126         return 1;
127     if (test__floatundidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
128         return 1;
129     if (test__floatundidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
130         return 1;
131 
132    return 0;
133 }
134