1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_floatundisf
3
4#include "int_lib.h"
5#include <float.h>
6#include <stdio.h>
7
8// Returns: convert a to a float, rounding toward even.
9
10// Assumption: float is a IEEE 32 bit floating point type
11// du_int is a 64 bit integral type
12
13// seee eeee emmm mmmm mmmm mmmm mmmm mmmm
14
15COMPILER_RT_ABI float __floatundisf(du_int a);
16
17int test__floatundisf(du_int a, float expected)
18{
19 float x = __floatundisf(a);
20 if (x != expected)
21 printf("error in __floatundisf(%llX) = %a, expected %a\n",
22 a, x, expected);
23 return x != expected;
24}
25
26char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0};
27char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
28char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
29
30int main()
31{
32 if (test__floatundisf(0, 0.0F))
33 return 1;
34
35 if (test__floatundisf(1, 1.0F))
36 return 1;
37 if (test__floatundisf(2, 2.0F))
38 return 1;
39
40 if (test__floatundisf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62F))
41 return 1;
42 if (test__floatundisf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62F))
43 return 1;
44
45 if (test__floatundisf(0x8000008000000000ULL, 0x1p+63F))
46 return 1;
47 if (test__floatundisf(0x8000010000000000LL, 0x1.000002p+63F))
48 return 1;
49
50 if (test__floatundisf(0x8000000000000000LL, 0x1p+63F))
51 return 1;
52 if (test__floatundisf(0x8000000000000001LL, 0x1p+63F))
53 return 1;
54
55 if (test__floatundisf(0xFFFFFFFFFFFFFFFELL, 0x1p+64F))
56 return 1;
57 if (test__floatundisf(0xFFFFFFFFFFFFFFFFLL, 0x1p+64F))
58 return 1;
59
60 if (test__floatundisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
61 return 1;
62
63 if (test__floatundisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
64 return 1;
65 if (test__floatundisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
66 return 1;
67 if (test__floatundisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
68 return 1;
69 if (test__floatundisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
70 return 1;
71 if (test__floatundisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
72 return 1;
73
74 if (test__floatundisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
75 return 1;
76 if (test__floatundisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
77 return 1;
78 if (test__floatundisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
79 return 1;
80 if (test__floatundisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
81 return 1;
82 if (test__floatundisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
83 return 1;
84
85 return 0;
86}
87