1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatundixf
3 //===-- floatundixf_test.c - Test __floatundixf ---------------------------===//
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 __floatundixf for the compiler_rt library.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "int_lib.h"
16 #include <stdio.h>
17 
18 
19 #if HAS_80_BIT_LONG_DOUBLE
20 // Returns: convert a to a long double, rounding toward even.
21 
22 // Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits
23 //             du_int is a 64 bit integral type
24 
25 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
26 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
27 
28 COMPILER_RT_ABI long double __floatundixf(du_int a);
29 
30 int test__floatundixf(du_int a, long double expected)
31 {
32     long double x = __floatundixf(a);
33     if (x != expected)
34         printf("error in __floatundixf(%llX) = %LA, expected %LA\n",
35                a, x, expected);
36     return x != expected;
37 }
38 
39 char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0};
40 char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
41 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
42 #endif
43 
44 int main()
45 {
46 #if HAS_80_BIT_LONG_DOUBLE
47     if (test__floatundixf(0, 0.0))
48         return 1;
49 
50     if (test__floatundixf(1, 1.0))
51         return 1;
52     if (test__floatundixf(2, 2.0))
53         return 1;
54     if (test__floatundixf(20, 20.0))
55         return 1;
56 
57     if (test__floatundixf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62))
58         return 1;
59     if (test__floatundixf(0x7FFFFFFFFFFFF800ULL, 0x1.FFFFFFFFFFFFEp+62))
60         return 1;
61     if (test__floatundixf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62))
62         return 1;
63     if (test__floatundixf(0x7FFFFFFFFFFFF000ULL, 0x1.FFFFFFFFFFFFCp+62))
64         return 1;
65     if (test__floatundixf(0x7FFFFFFFFFFFFFFFULL, 0xF.FFFFFFFFFFFFFFEp+59L))
66         return 1;
67     if (test__floatundixf(0xFFFFFFFFFFFFFFFEULL, 0xF.FFFFFFFFFFFFFFEp+60L))
68         return 1;
69     if (test__floatundixf(0xFFFFFFFFFFFFFFFFULL, 0xF.FFFFFFFFFFFFFFFp+60L))
70         return 1;
71 
72     if (test__floatundixf(0x8000008000000000ULL, 0x8.000008p+60))
73         return 1;
74     if (test__floatundixf(0x8000000000000800ULL, 0x8.0000000000008p+60))
75         return 1;
76     if (test__floatundixf(0x8000010000000000ULL, 0x8.00001p+60))
77         return 1;
78     if (test__floatundixf(0x8000000000001000ULL, 0x8.000000000001p+60))
79         return 1;
80 
81     if (test__floatundixf(0x8000000000000000ULL, 0x8p+60))
82         return 1;
83     if (test__floatundixf(0x8000000000000001ULL, 0x8.000000000000001p+60L))
84         return 1;
85 
86     if (test__floatundixf(0x0007FB72E8000000ULL, 0x1.FEDCBAp+50))
87         return 1;
88 
89     if (test__floatundixf(0x0007FB72EA000000ULL, 0x1.FEDCBA8p+50))
90         return 1;
91     if (test__floatundixf(0x0007FB72EB000000ULL, 0x1.FEDCBACp+50))
92         return 1;
93     if (test__floatundixf(0x0007FB72EBFFFFFFULL, 0x1.FEDCBAFFFFFFCp+50))
94         return 1;
95     if (test__floatundixf(0x0007FB72EC000000ULL, 0x1.FEDCBBp+50))
96         return 1;
97     if (test__floatundixf(0x0007FB72E8000001ULL, 0x1.FEDCBA0000004p+50))
98         return 1;
99 
100     if (test__floatundixf(0x0007FB72E6000000ULL, 0x1.FEDCB98p+50))
101         return 1;
102     if (test__floatundixf(0x0007FB72E7000000ULL, 0x1.FEDCB9Cp+50))
103         return 1;
104     if (test__floatundixf(0x0007FB72E7FFFFFFULL, 0x1.FEDCB9FFFFFFCp+50))
105         return 1;
106     if (test__floatundixf(0x0007FB72E4000001ULL, 0x1.FEDCB90000004p+50))
107         return 1;
108     if (test__floatundixf(0x0007FB72E4000000ULL, 0x1.FEDCB9p+50))
109         return 1;
110 
111     if (test__floatundixf(0x023479FD0E092DC0ULL, 0x1.1A3CFE870496Ep+57))
112         return 1;
113     if (test__floatundixf(0x023479FD0E092DA1ULL, 0x8.D1E7F43824B684p+54L))
114         return 1;
115     if (test__floatundixf(0x023479FD0E092DB0ULL, 0x8.D1E7f43824B6Cp+54L))
116         return 1;
117     if (test__floatundixf(0x023479FD0E092DB8ULL, 0x8.D1E7F43824B6Ep+54L))
118         return 1;
119     if (test__floatundixf(0x023479FD0E092DB6ULL, 0x8.D1E7F43824B6D8p+54L))
120         return 1;
121     if (test__floatundixf(0x023479FD0E092DBFULL, 0x8.D1E7F43824B6FCp+54L))
122         return 1;
123     if (test__floatundixf(0x023479FD0E092DC1ULL, 0x8.D1E7F43824B704p+54L))
124         return 1;
125     if (test__floatundixf(0x023479FD0E092DC7ULL, 0x8.D1E7F43824B71Cp+54L))
126         return 1;
127     if (test__floatundixf(0x023479FD0E092DC8ULL, 0x8.D1E7F43824B72p+54L))
128         return 1;
129     if (test__floatundixf(0x023479FD0E092DCFULL, 0x8.D1E7F43824B73Cp+54L))
130         return 1;
131     if (test__floatundixf(0x023479FD0E092DD0ULL, 0x8.D1E7F43824B74p+54L))
132         return 1;
133     if (test__floatundixf(0x023479FD0E092DD1ULL, 0x8.D1E7F43824B744p+54L))
134         return 1;
135     if (test__floatundixf(0x023479FD0E092DD8ULL, 0x8.D1E7F43824B76p+54L))
136         return 1;
137     if (test__floatundixf(0x023479FD0E092DDFULL, 0x8.D1E7F43824B77Cp+54L))
138         return 1;
139     if (test__floatundixf(0x023479FD0E092DE0ULL, 0x1.1A3CFE870496Fp+57))
140         return 1;
141 
142 #else
143     printf("skipped\n");
144 #endif
145    return 0;
146 }
147