1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatdisf
3 //===-- floatdisf_test.c - Test __floatdisf -------------------------------===//
4 //
5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
6 // See https://llvm.org/LICENSE.txt for license information.
7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //
9 //===----------------------------------------------------------------------===//
10 //
11 // This file tests __floatdisf for the compiler_rt library.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "int_lib.h"
16 #include <float.h>
17 #include <stdio.h>
18 
19 // Returns: convert a to a float, rounding toward even.
20 
21 // Assumption: float is a IEEE 32 bit floating point type
22 //             di_int is a 64 bit integral type
23 
24 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
25 
26 COMPILER_RT_ABI float __floatdisf(di_int a);
27 
28 int test__floatdisf(di_int a, float expected)
29 {
30     float x = __floatdisf(a);
31     if (x != expected)
32         printf("error in __floatdisf(%llX) = %a, expected %a\n",
33                a, x, expected);
34     return x != expected;
35 }
36 
37 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
38 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
39 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
40 
41 int main()
42 {
43     if (test__floatdisf(0, 0.0F))
44         return 1;
45 
46     if (test__floatdisf(1, 1.0F))
47         return 1;
48     if (test__floatdisf(2, 2.0F))
49         return 1;
50     if (test__floatdisf(-1, -1.0F))
51         return 1;
52     if (test__floatdisf(-2, -2.0F))
53         return 1;
54 
55     if (test__floatdisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
56         return 1;
57     if (test__floatdisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
58         return 1;
59 
60     if (test__floatdisf(0x8000008000000000LL, -0x1.FFFFFEp+62F))
61         return 1;
62     if (test__floatdisf(0x8000010000000000LL, -0x1.FFFFFCp+62F))
63         return 1;
64 
65     if (test__floatdisf(0x8000000000000000LL, -0x1.000000p+63F))
66         return 1;
67     if (test__floatdisf(0x8000000000000001LL, -0x1.000000p+63F))
68         return 1;
69 
70     if (test__floatdisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
71         return 1;
72 
73     if (test__floatdisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
74         return 1;
75     if (test__floatdisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
76         return 1;
77     if (test__floatdisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
78         return 1;
79     if (test__floatdisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
80         return 1;
81     if (test__floatdisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
82         return 1;
83 
84     if (test__floatdisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
85         return 1;
86     if (test__floatdisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
87         return 1;
88     if (test__floatdisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
89         return 1;
90     if (test__floatdisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
91         return 1;
92     if (test__floatdisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
93         return 1;
94 
95    return 0;
96 }
97