1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_fixunsdfdi
3
4#include "int_lib.h"
5#include <stdio.h>
6
7// Returns: convert a to a unsigned long long, rounding toward zero.
8// Negative values all become zero.
9
10// Assumption: double is a IEEE 64 bit floating point type
11// du_int is a 64 bit integral type
12// value in double is representable in du_int or is negative
13// (no range checking performed)
14
15// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
16
17COMPILER_RT_ABI du_int __fixunsdfdi(double a);
18
19int test__fixunsdfdi(double a, du_int expected)
20{
21 du_int x = __fixunsdfdi(a);
22 if (x != expected)
23 printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected);
24 return x != expected;
25}
26
27char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
28char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
29char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
30
31int main()
32{
33 if (test__fixunsdfdi(0.0, 0))
34 return 1;
35
36 if (test__fixunsdfdi(0.5, 0))
37 return 1;
38 if (test__fixunsdfdi(0.99, 0))
39 return 1;
40 if (test__fixunsdfdi(1.0, 1))
41 return 1;
42 if (test__fixunsdfdi(1.5, 1))
43 return 1;
44 if (test__fixunsdfdi(1.99, 1))
45 return 1;
46 if (test__fixunsdfdi(2.0, 2))
47 return 1;
48 if (test__fixunsdfdi(2.01, 2))
49 return 1;
50 if (test__fixunsdfdi(-0.5, 0))
51 return 1;
52 if (test__fixunsdfdi(-0.99, 0))
53 return 1;
54#if !TARGET_LIBGCC
55 if (test__fixunsdfdi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
56 return 1;
57 if (test__fixunsdfdi(-1.5, 0))
58 return 1;
59 if (test__fixunsdfdi(-1.99, 0))
60 return 1;
61 if (test__fixunsdfdi(-2.0, 0))
62 return 1;
63 if (test__fixunsdfdi(-2.01, 0))
64 return 1;
65#endif
66
67 if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
68 return 1;
69 if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
70 return 1;
71
72#if !TARGET_LIBGCC
73 if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0))
74 return 1;
75 if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0))
76 return 1;
77#endif
78
79 if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
80 return 1;
81 if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL))
82 return 1;
83 if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
84 return 1;
85 if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
86 return 1;
87
88#if !TARGET_LIBGCC
89 if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
90 return 1;
91 if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
92 return 1;
93#endif
94
95 return 0;
96}
97