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