1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatundisf
3 //===-- floatundisf_test.c - Test __floatundisf ---------------------------===//
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 __floatundisf 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 //             du_int is a 64 bit integral type
23 
24 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
25 
26 COMPILER_RT_ABI float __floatundisf(du_int a);
27 
28 int test__floatundisf(du_int a, float expected)
29 {
30     float x = __floatundisf(a);
31     if (x != expected)
32         printf("error in __floatundisf(%llX) = %a, expected %a\n",
33                a, x, expected);
34     return x != expected;
35 }
36 
37 char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0};
38 char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
39 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
40 
41 int main()
42 {
43     if (test__floatundisf(0, 0.0F))
44         return 1;
45 
46     if (test__floatundisf(1, 1.0F))
47         return 1;
48     if (test__floatundisf(2, 2.0F))
49         return 1;
50 
51     if (test__floatundisf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62F))
52         return 1;
53     if (test__floatundisf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62F))
54         return 1;
55 
56     if (test__floatundisf(0x8000008000000000ULL, 0x1p+63F))
57         return 1;
58     if (test__floatundisf(0x8000010000000000LL, 0x1.000002p+63F))
59         return 1;
60 
61     if (test__floatundisf(0x8000000000000000LL, 0x1p+63F))
62         return 1;
63     if (test__floatundisf(0x8000000000000001LL, 0x1p+63F))
64         return 1;
65 
66     if (test__floatundisf(0xFFFFFFFFFFFFFFFELL, 0x1p+64F))
67         return 1;
68     if (test__floatundisf(0xFFFFFFFFFFFFFFFFLL, 0x1p+64F))
69         return 1;
70 
71     if (test__floatundisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
72         return 1;
73 
74     if (test__floatundisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
75         return 1;
76     if (test__floatundisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
77         return 1;
78     if (test__floatundisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
79         return 1;
80     if (test__floatundisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
81         return 1;
82     if (test__floatundisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
83         return 1;
84 
85     if (test__floatundisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
86         return 1;
87     if (test__floatundisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
88         return 1;
89     if (test__floatundisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
90         return 1;
91     if (test__floatundisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
92         return 1;
93     if (test__floatundisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
94         return 1;
95 
96    return 0;
97 }
98