1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatuntidf
3 // REQUIRES: int128
4 //===-- floatuntidf.c - Test __floatuntidf --------------------------------===//
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 __floatuntidf for the compiler_rt library.
13 //
14 //===----------------------------------------------------------------------===//
15 
16 #include "int_lib.h"
17 #include <float.h>
18 #include <stdio.h>
19 
20 #ifdef CRT_HAS_128BIT
21 
22 // Returns: convert a to a double, rounding toward even.
23 
24 // Assumption: double is a IEEE 64 bit floating point type
25 //             tu_int is a 64 bit integral type
26 
27 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
28 
29 COMPILER_RT_ABI double __floatuntidf(tu_int a);
30 
31 int test__floatuntidf(tu_int a, double expected)
32 {
33     double x = __floatuntidf(a);
34     if (x != expected)
35     {
36         utwords at;
37         at.all = a;
38         printf("error in __floatuntidf(0x%.16llX%.16llX) = %a, expected %a\n",
39                at.s.high, at.s.low, x, expected);
40     }
41     return x != expected;
42 }
43 
44 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
45 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
46 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
47 
48 #endif
49 
50 int main()
51 {
52 #ifdef CRT_HAS_128BIT
53     if (test__floatuntidf(0, 0.0))
54         return 1;
55 
56     if (test__floatuntidf(1, 1.0))
57         return 1;
58     if (test__floatuntidf(2, 2.0))
59         return 1;
60     if (test__floatuntidf(20, 20.0))
61         return 1;
62 
63     if (test__floatuntidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
64         return 1;
65     if (test__floatuntidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
66         return 1;
67     if (test__floatuntidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
68         return 1;
69     if (test__floatuntidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
70         return 1;
71 
72     if (test__floatuntidf(make_ti(0x8000008000000000LL, 0), 0x1.000001p+127))
73         return 1;
74     if (test__floatuntidf(make_ti(0x8000000000000800LL, 0), 0x1.0000000000001p+127))
75         return 1;
76     if (test__floatuntidf(make_ti(0x8000010000000000LL, 0), 0x1.000002p+127))
77         return 1;
78     if (test__floatuntidf(make_ti(0x8000000000001000LL, 0), 0x1.0000000000002p+127))
79         return 1;
80 
81     if (test__floatuntidf(make_ti(0x8000000000000000LL, 0), 0x1.000000p+127))
82         return 1;
83     if (test__floatuntidf(make_ti(0x8000000000000001LL, 0), 0x1.0000000000000002p+127))
84         return 1;
85 
86     if (test__floatuntidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
87         return 1;
88 
89     if (test__floatuntidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
90         return 1;
91     if (test__floatuntidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
92         return 1;
93     if (test__floatuntidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
94         return 1;
95     if (test__floatuntidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
96         return 1;
97     if (test__floatuntidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
98         return 1;
99 
100     if (test__floatuntidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
101         return 1;
102     if (test__floatuntidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
103         return 1;
104     if (test__floatuntidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
105         return 1;
106     if (test__floatuntidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
107         return 1;
108     if (test__floatuntidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
109         return 1;
110 
111     if (test__floatuntidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
112         return 1;
113     if (test__floatuntidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
114         return 1;
115     if (test__floatuntidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
116         return 1;
117     if (test__floatuntidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
118         return 1;
119     if (test__floatuntidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
120         return 1;
121     if (test__floatuntidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
122         return 1;
123     if (test__floatuntidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
124         return 1;
125     if (test__floatuntidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
126         return 1;
127     if (test__floatuntidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
128         return 1;
129     if (test__floatuntidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
130         return 1;
131     if (test__floatuntidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
132         return 1;
133     if (test__floatuntidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
134         return 1;
135     if (test__floatuntidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
136         return 1;
137     if (test__floatuntidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
138         return 1;
139     if (test__floatuntidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
140         return 1;
141 
142     if (test__floatuntidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
143         return 1;
144     if (test__floatuntidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
145         return 1;
146     if (test__floatuntidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
147         return 1;
148     if (test__floatuntidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
149         return 1;
150     if (test__floatuntidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
151         return 1;
152     if (test__floatuntidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
153         return 1;
154     if (test__floatuntidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
155         return 1;
156     if (test__floatuntidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
157         return 1;
158     if (test__floatuntidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
159         return 1;
160     if (test__floatuntidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
161         return 1;
162     if (test__floatuntidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
163         return 1;
164     if (test__floatuntidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
165         return 1;
166     if (test__floatuntidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
167         return 1;
168     if (test__floatuntidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
169         return 1;
170     if (test__floatuntidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
171         return 1;
172 #else
173     printf("skipped\n");
174 #endif
175    return 0;
176 }
177