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