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
|
//===-- fixunsdfdi_test.c - Test __fixunsdfdi -----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file tests __fixunsdfdi for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#include <stdio.h>
// Returns: convert a to a unsigned long long, rounding toward zero.
// Negative values all become zero.
// Assumption: double is a IEEE 64 bit floating point type
// du_int is a 64 bit integral type
// value in double is representable in du_int or is negative
// (no range checking performed)
// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
du_int __fixunsdfdi(double a);
int test__fixunsdfdi(double a, du_int expected)
{
du_int x = __fixunsdfdi(a);
if (x != expected)
printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected);
return x != expected;
}
char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
int main()
{
if (test__fixunsdfdi(0.0, 0))
return 1;
if (test__fixunsdfdi(0.5, 0))
return 1;
if (test__fixunsdfdi(0.99, 0))
return 1;
if (test__fixunsdfdi(1.0, 1))
return 1;
if (test__fixunsdfdi(1.5, 1))
return 1;
if (test__fixunsdfdi(1.99, 1))
return 1;
if (test__fixunsdfdi(2.0, 2))
return 1;
if (test__fixunsdfdi(2.01, 2))
return 1;
if (test__fixunsdfdi(-0.5, 0))
return 1;
if (test__fixunsdfdi(-0.99, 0))
return 1;
#if !TARGET_LIBGCC
if (test__fixunsdfdi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
return 1;
if (test__fixunsdfdi(-1.5, 0))
return 1;
if (test__fixunsdfdi(-1.99, 0))
return 1;
if (test__fixunsdfdi(-2.0, 0))
return 1;
if (test__fixunsdfdi(-2.01, 0))
return 1;
#endif
if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
return 1;
if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
return 1;
#if !TARGET_LIBGCC
if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0))
return 1;
if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0))
return 1;
#endif
if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
return 1;
if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL))
return 1;
if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
return 1;
if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
return 1;
#if !TARGET_LIBGCC
if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
return 1;
if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
return 1;
#endif
return 0;
}
|
