1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floattidf
3 // REQUIRES: int128
4 
5 #include "int_lib.h"
6 #include <float.h>
7 #include <stdio.h>
8 
9 #ifdef CRT_HAS_128BIT
10 
11 // Returns: convert a to a double, rounding toward even.
12 
13 // Assumption: double is a IEEE 64 bit floating point type
14 //             ti_int is a 64 bit integral type
15 
16 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
17 
18 COMPILER_RT_ABI double __floattidf(ti_int a);
19 
test__floattidf(ti_int a,double expected)20 int test__floattidf(ti_int a, double expected)
21 {
22     double x = __floattidf(a);
23     if (x != expected)
24     {
25         twords at;
26         at.all = a;
27         printf("error in __floattidf(0x%.16llX%.16llX) = %a, expected %a\n",
28                at.s.high, at.s.low, x, expected);
29     }
30     return x != expected;
31 }
32 
33 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
34 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
35 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
36 
37 #endif
38 
main()39 int main()
40 {
41 #ifdef CRT_HAS_128BIT
42     if (test__floattidf(0, 0.0))
43         return 1;
44 
45     if (test__floattidf(1, 1.0))
46         return 1;
47     if (test__floattidf(2, 2.0))
48         return 1;
49     if (test__floattidf(20, 20.0))
50         return 1;
51     if (test__floattidf(-1, -1.0))
52         return 1;
53     if (test__floattidf(-2, -2.0))
54         return 1;
55     if (test__floattidf(-20, -20.0))
56         return 1;
57 
58     if (test__floattidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
59         return 1;
60     if (test__floattidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
61         return 1;
62     if (test__floattidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
63         return 1;
64     if (test__floattidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
65         return 1;
66 
67     if (test__floattidf(make_ti(0x8000008000000000LL, 0), -0x1.FFFFFEp+126))
68         return 1;
69     if (test__floattidf(make_ti(0x8000000000000800LL, 0), -0x1.FFFFFFFFFFFFEp+126))
70         return 1;
71     if (test__floattidf(make_ti(0x8000010000000000LL, 0), -0x1.FFFFFCp+126))
72         return 1;
73     if (test__floattidf(make_ti(0x8000000000001000LL, 0), -0x1.FFFFFFFFFFFFCp+126))
74         return 1;
75 
76     if (test__floattidf(make_ti(0x8000000000000000LL, 0), -0x1.000000p+127))
77         return 1;
78     if (test__floattidf(make_ti(0x8000000000000001LL, 0), -0x1.000000p+127))
79         return 1;
80 
81     if (test__floattidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
82         return 1;
83 
84     if (test__floattidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
85         return 1;
86     if (test__floattidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
87         return 1;
88     if (test__floattidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
89         return 1;
90     if (test__floattidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
91         return 1;
92     if (test__floattidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
93         return 1;
94 
95     if (test__floattidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
96         return 1;
97     if (test__floattidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
98         return 1;
99     if (test__floattidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
100         return 1;
101     if (test__floattidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
102         return 1;
103     if (test__floattidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
104         return 1;
105 
106     if (test__floattidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
107         return 1;
108     if (test__floattidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
109         return 1;
110     if (test__floattidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
111         return 1;
112     if (test__floattidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
113         return 1;
114     if (test__floattidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
115         return 1;
116     if (test__floattidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
117         return 1;
118     if (test__floattidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
119         return 1;
120     if (test__floattidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
121         return 1;
122     if (test__floattidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
123         return 1;
124     if (test__floattidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
125         return 1;
126     if (test__floattidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
127         return 1;
128     if (test__floattidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
129         return 1;
130     if (test__floattidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
131         return 1;
132     if (test__floattidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
133         return 1;
134     if (test__floattidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
135         return 1;
136 
137     if (test__floattidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
138         return 1;
139     if (test__floattidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
140         return 1;
141     if (test__floattidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
142         return 1;
143     if (test__floattidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
144         return 1;
145     if (test__floattidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
146         return 1;
147     if (test__floattidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
148         return 1;
149     if (test__floattidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
150         return 1;
151     if (test__floattidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
152         return 1;
153     if (test__floattidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
154         return 1;
155     if (test__floattidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
156         return 1;
157     if (test__floattidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
158         return 1;
159     if (test__floattidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
160         return 1;
161     if (test__floattidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
162         return 1;
163     if (test__floattidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
164         return 1;
165     if (test__floattidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
166         return 1;
167 #else
168     printf("skipped\n");
169 #endif
170    return 0;
171 }
172