1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: librt_has_floatdisf
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// di_int is a 64 bit integral type
12
13// seee eeee emmm mmmm mmmm mmmm mmmm mmmm
14
15COMPILER_RT_ABI float __floatdisf(di_int a);
16
17int test__floatdisf(di_int a, float expected)
18{
19 float x = __floatdisf(a);
20 if (x != expected)
21 printf("error in __floatdisf(%llX) = %a, expected %a\n",
22 a, x, expected);
23 return x != expected;
24}
25
26char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
27char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
28char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
29
30int main()
31{
32 if (test__floatdisf(0, 0.0F))
33 return 1;
34
35 if (test__floatdisf(1, 1.0F))
36 return 1;
37 if (test__floatdisf(2, 2.0F))
38 return 1;
39 if (test__floatdisf(-1, -1.0F))
40 return 1;
41 if (test__floatdisf(-2, -2.0F))
42 return 1;
43
44 if (test__floatdisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
45 return 1;
46 if (test__floatdisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
47 return 1;
48
49 if (test__floatdisf(0x8000008000000000LL, -0x1.FFFFFEp+62F))
50 return 1;
51 if (test__floatdisf(0x8000010000000000LL, -0x1.FFFFFCp+62F))
52 return 1;
53
54 if (test__floatdisf(0x8000000000000000LL, -0x1.000000p+63F))
55 return 1;
56 if (test__floatdisf(0x8000000000000001LL, -0x1.000000p+63F))
57 return 1;
58
59 if (test__floatdisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
60 return 1;
61
62 if (test__floatdisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
63 return 1;
64 if (test__floatdisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
65 return 1;
66 if (test__floatdisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
67 return 1;
68 if (test__floatdisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
69 return 1;
70 if (test__floatdisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
71 return 1;
72
73 if (test__floatdisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
74 return 1;
75 if (test__floatdisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
76 return 1;
77 if (test__floatdisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
78 return 1;
79 if (test__floatdisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
80 return 1;
81 if (test__floatdisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
82 return 1;
83
84 return 0;
85}
86