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1 //===-- floatdisf_test.c - Test __floatdisf -------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file tests __floatdisf for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "int_lib.h"
15 #include <float.h>
16 #include <stdio.h>
17 
18 // Returns: convert a to a float, rounding toward even.
19 
20 // Assumption: float is a IEEE 32 bit floating point type
21 //             di_int is a 64 bit integral type
22 
23 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
24 
25 COMPILER_RT_ABI float __floatdisf(di_int a);
26 
test__floatdisf(di_int a,float expected)27 int test__floatdisf(di_int a, float expected)
28 {
29     float x = __floatdisf(a);
30     if (x != expected)
31         printf("error in __floatdisf(%llX) = %a, expected %a\n",
32                a, x, expected);
33     return x != expected;
34 }
35 
36 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
37 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
38 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
39 
main()40 int main()
41 {
42     if (test__floatdisf(0, 0.0F))
43         return 1;
44 
45     if (test__floatdisf(1, 1.0F))
46         return 1;
47     if (test__floatdisf(2, 2.0F))
48         return 1;
49     if (test__floatdisf(-1, -1.0F))
50         return 1;
51     if (test__floatdisf(-2, -2.0F))
52         return 1;
53 
54     if (test__floatdisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
55         return 1;
56     if (test__floatdisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
57         return 1;
58 
59     if (test__floatdisf(0x8000008000000000LL, -0x1.FFFFFEp+62F))
60         return 1;
61     if (test__floatdisf(0x8000010000000000LL, -0x1.FFFFFCp+62F))
62         return 1;
63 
64     if (test__floatdisf(0x8000000000000000LL, -0x1.000000p+63F))
65         return 1;
66     if (test__floatdisf(0x8000000000000001LL, -0x1.000000p+63F))
67         return 1;
68 
69     if (test__floatdisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
70         return 1;
71 
72     if (test__floatdisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
73         return 1;
74     if (test__floatdisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
75         return 1;
76     if (test__floatdisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
77         return 1;
78     if (test__floatdisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
79         return 1;
80     if (test__floatdisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
81         return 1;
82 
83     if (test__floatdisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
84         return 1;
85     if (test__floatdisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
86         return 1;
87     if (test__floatdisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
88         return 1;
89     if (test__floatdisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
90         return 1;
91     if (test__floatdisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
92         return 1;
93 
94    return 0;
95 }
96