1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floattisf
3 // REQUIRES: int128
4
5 #include "int_lib.h"
6 #include <float.h>
7 #include <stdio.h>
8
9 #ifdef CRT_HAS_128BIT
10
11 // Returns: convert a to a float, rounding toward even.
12
13 // Assumption: float is a IEEE 32 bit floating point type
14 // ti_int is a 64 bit integral type
15
16 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
17
18 COMPILER_RT_ABI float __floattisf(ti_int a);
19
test__floattisf(ti_int a,float expected)20 int test__floattisf(ti_int a, float expected)
21 {
22 float x = __floattisf(a);
23 if (x != expected)
24 {
25 twords at;
26 at.all = a;
27 printf("error in __floattisf(0x%.16llX%.16llX) = %a, expected %a\n",
28 at.s.high, at.s.low, x, expected);
29 }
30 return x != expected;
31 }
32
33 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
34 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
35 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
36
37 #endif
38
main()39 int main()
40 {
41 #ifdef CRT_HAS_128BIT
42 if (test__floattisf(0, 0.0F))
43 return 1;
44
45 if (test__floattisf(1, 1.0F))
46 return 1;
47 if (test__floattisf(2, 2.0F))
48 return 1;
49 if (test__floattisf(-1, -1.0F))
50 return 1;
51 if (test__floattisf(-2, -2.0F))
52 return 1;
53
54 if (test__floattisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
55 return 1;
56 if (test__floattisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
57 return 1;
58
59 if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000008000000000LL),
60 -0x1.FFFFFEp+62F))
61 return 1;
62 if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000010000000000LL),
63 -0x1.FFFFFCp+62F))
64 return 1;
65
66 if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000000000000000LL),
67 -0x1.000000p+63F))
68 return 1;
69 if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000000000000001LL),
70 -0x1.000000p+63F))
71 return 1;
72
73 if (test__floattisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
74 return 1;
75
76 if (test__floattisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
77 return 1;
78 if (test__floattisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
79 return 1;
80 if (test__floattisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
81 return 1;
82 if (test__floattisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
83 return 1;
84 if (test__floattisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
85 return 1;
86
87 if (test__floattisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
88 return 1;
89 if (test__floattisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
90 return 1;
91 if (test__floattisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
92 return 1;
93 if (test__floattisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
94 return 1;
95 if (test__floattisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
96 return 1;
97
98 if (test__floattisf(make_ti(0x0007FB72E8000000LL, 0), 0x1.FEDCBAp+114F))
99 return 1;
100
101 if (test__floattisf(make_ti(0x0007FB72EA000000LL, 0), 0x1.FEDCBAp+114F))
102 return 1;
103 if (test__floattisf(make_ti(0x0007FB72EB000000LL, 0), 0x1.FEDCBAp+114F))
104 return 1;
105 if (test__floattisf(make_ti(0x0007FB72EBFFFFFFLL, 0), 0x1.FEDCBAp+114F))
106 return 1;
107 if (test__floattisf(make_ti(0x0007FB72EC000000LL, 0), 0x1.FEDCBCp+114F))
108 return 1;
109 if (test__floattisf(make_ti(0x0007FB72E8000001LL, 0), 0x1.FEDCBAp+114F))
110 return 1;
111
112 if (test__floattisf(make_ti(0x0007FB72E6000000LL, 0), 0x1.FEDCBAp+114F))
113 return 1;
114 if (test__floattisf(make_ti(0x0007FB72E7000000LL, 0), 0x1.FEDCBAp+114F))
115 return 1;
116 if (test__floattisf(make_ti(0x0007FB72E7FFFFFFLL, 0), 0x1.FEDCBAp+114F))
117 return 1;
118 if (test__floattisf(make_ti(0x0007FB72E4000001LL, 0), 0x1.FEDCBAp+114F))
119 return 1;
120 if (test__floattisf(make_ti(0x0007FB72E4000000LL, 0), 0x1.FEDCB8p+114F))
121 return 1;
122
123 #else
124 printf("skipped\n");
125 #endif
126 return 0;
127 }
128