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
18COMPILER_RT_ABI double __floattidf(ti_int a);
19
20int 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
33char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
34char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
35char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
36
37#endif
38
39int 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