1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_fixdfti
3 // REQUIRES: int128
4
5 #include "int_lib.h"
6 #include <stdio.h>
7
8 #ifdef CRT_HAS_128BIT
9
10 // Returns: convert a to a signed long long, rounding toward zero.
11
12 // Assumption: double is a IEEE 64 bit floating point type
13 // su_int is a 32 bit integral type
14 // value in double is representable in ti_int (no range checking performed)
15
16 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
17
18 COMPILER_RT_ABI ti_int __fixdfti(double a);
19
test__fixdfti(double a,ti_int expected)20 int test__fixdfti(double a, ti_int expected)
21 {
22 ti_int x = __fixdfti(a);
23 if (x != expected)
24 {
25 twords xt;
26 xt.all = x;
27 twords expectedt;
28 expectedt.all = expected;
29 printf("error in __fixdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
30 a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
31 }
32 return x != expected;
33 }
34
35 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
36 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
37 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
38
39 #endif
40
main()41 int main()
42 {
43 #ifdef CRT_HAS_128BIT
44 if (test__fixdfti(0.0, 0))
45 return 1;
46
47 if (test__fixdfti(0.5, 0))
48 return 1;
49 if (test__fixdfti(0.99, 0))
50 return 1;
51 if (test__fixdfti(1.0, 1))
52 return 1;
53 if (test__fixdfti(1.5, 1))
54 return 1;
55 if (test__fixdfti(1.99, 1))
56 return 1;
57 if (test__fixdfti(2.0, 2))
58 return 1;
59 if (test__fixdfti(2.01, 2))
60 return 1;
61 if (test__fixdfti(-0.5, 0))
62 return 1;
63 if (test__fixdfti(-0.99, 0))
64 return 1;
65 if (test__fixdfti(-1.0, -1))
66 return 1;
67 if (test__fixdfti(-1.5, -1))
68 return 1;
69 if (test__fixdfti(-1.99, -1))
70 return 1;
71 if (test__fixdfti(-2.0, -2))
72 return 1;
73 if (test__fixdfti(-2.01, -2))
74 return 1;
75
76 if (test__fixdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
77 return 1;
78 if (test__fixdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
79 return 1;
80
81 if (test__fixdfti(-0x1.FFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
82 0x8000008000000000LL)))
83 return 1;
84 if (test__fixdfti(-0x1.FFFFFCp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
85 0x8000010000000000LL)))
86 return 1;
87
88 if (test__fixdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
89 return 1;
90 if (test__fixdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
91 return 1;
92
93 if (test__fixdfti(-0x1.FFFFFFFFFFFFFp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
94 0x8000000000000400LL)))
95 return 1;
96 if (test__fixdfti(-0x1.FFFFFFFFFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
97 0x8000000000000800LL)))
98 return 1;
99
100 if (test__fixdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00LL, 0)))
101 return 1;
102 if (test__fixdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800LL, 0)))
103 return 1;
104
105 if (test__fixdfti(-0x1.FFFFFFFFFFFFFp+126, make_ti(0x8000000000000400LL, 0)))
106 return 1;
107 if (test__fixdfti(-0x1.FFFFFFFFFFFFEp+126, make_ti(0x8000000000000800LL, 0)))
108 return 1;
109
110 #else
111 printf("skipped\n");
112 #endif
113 return 0;
114 }
115