1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_fixdfdi
3
4#include "int_lib.h"
5#include <stdio.h>
6
7// Returns: convert a to a signed long long, rounding toward zero.
8
9// Assumption: double is a IEEE 64 bit floating point type
10// su_int is a 32 bit integral type
11// value in double is representable in di_int (no range checking performed)
12
13// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
14
15COMPILER_RT_ABI di_int __fixdfdi(double a);
16
17int test__fixdfdi(double a, di_int expected)
18{
19 di_int x = __fixdfdi(a);
20 if (x != expected)
21 printf("error in __fixdfdi(%A) = %llX, expected %llX\n", a, x, expected);
22 return x != expected;
23}
24
25char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
26char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
27char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
28
29int main()
30{
31 if (test__fixdfdi(0.0, 0))
32 return 1;
33
34 if (test__fixdfdi(0.5, 0))
35 return 1;
36 if (test__fixdfdi(0.99, 0))
37 return 1;
38 if (test__fixdfdi(1.0, 1))
39 return 1;
40 if (test__fixdfdi(1.5, 1))
41 return 1;
42 if (test__fixdfdi(1.99, 1))
43 return 1;
44 if (test__fixdfdi(2.0, 2))
45 return 1;
46 if (test__fixdfdi(2.01, 2))
47 return 1;
48 if (test__fixdfdi(-0.5, 0))
49 return 1;
50 if (test__fixdfdi(-0.99, 0))
51 return 1;
52 if (test__fixdfdi(-1.0, -1))
53 return 1;
54 if (test__fixdfdi(-1.5, -1))
55 return 1;
56 if (test__fixdfdi(-1.99, -1))
57 return 1;
58 if (test__fixdfdi(-2.0, -2))
59 return 1;
60 if (test__fixdfdi(-2.01, -2))
61 return 1;
62
63 if (test__fixdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
64 return 1;
65 if (test__fixdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
66 return 1;
67
68 if (test__fixdfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL))
69 return 1;
70 if (test__fixdfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL))
71 return 1;
72
73 if (test__fixdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
74 return 1;
75 if (test__fixdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
76 return 1;
77
78 if (test__fixdfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL))
79 return 1;
80 if (test__fixdfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL))
81 return 1;
82
83 return 0;
84}
85