1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: int128
3//===-- floatuntidf.c - Test __floatuntidf --------------------------------===//
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 __floatuntidf for the compiler_rt library.
12//
13//===----------------------------------------------------------------------===//
14
15#include "int_lib.h"
16#include <float.h>
17#include <stdio.h>
18
19#ifdef CRT_HAS_128BIT
20
21// Returns: convert a to a double, rounding toward even.
22
23// Assumption: double is a IEEE 64 bit floating point type
24//             tu_int is a 64 bit integral type
25
26// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
27
28COMPILER_RT_ABI double __floatuntidf(tu_int a);
29
30int test__floatuntidf(tu_int a, double expected)
31{
32    double x = __floatuntidf(a);
33    if (x != expected)
34    {
35        utwords at;
36        at.all = a;
37        printf("error in __floatuntidf(0x%.16llX%.16llX) = %a, expected %a\n",
38               at.s.high, at.s.low, x, expected);
39    }
40    return x != expected;
41}
42
43char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
44char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
45char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
46
47#endif
48
49int main()
50{
51#ifdef CRT_HAS_128BIT
52    if (test__floatuntidf(0, 0.0))
53        return 1;
54
55    if (test__floatuntidf(1, 1.0))
56        return 1;
57    if (test__floatuntidf(2, 2.0))
58        return 1;
59    if (test__floatuntidf(20, 20.0))
60        return 1;
61
62    if (test__floatuntidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
63        return 1;
64    if (test__floatuntidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
65        return 1;
66    if (test__floatuntidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
67        return 1;
68    if (test__floatuntidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
69        return 1;
70
71    if (test__floatuntidf(make_ti(0x8000008000000000LL, 0), 0x1.000001p+127))
72        return 1;
73    if (test__floatuntidf(make_ti(0x8000000000000800LL, 0), 0x1.0000000000001p+127))
74        return 1;
75    if (test__floatuntidf(make_ti(0x8000010000000000LL, 0), 0x1.000002p+127))
76        return 1;
77    if (test__floatuntidf(make_ti(0x8000000000001000LL, 0), 0x1.0000000000002p+127))
78        return 1;
79
80    if (test__floatuntidf(make_ti(0x8000000000000000LL, 0), 0x1.000000p+127))
81        return 1;
82    if (test__floatuntidf(make_ti(0x8000000000000001LL, 0), 0x1.0000000000000002p+127))
83        return 1;
84
85    if (test__floatuntidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
86        return 1;
87
88    if (test__floatuntidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
89        return 1;
90    if (test__floatuntidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
91        return 1;
92    if (test__floatuntidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
93        return 1;
94    if (test__floatuntidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
95        return 1;
96    if (test__floatuntidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
97        return 1;
98
99    if (test__floatuntidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
100        return 1;
101    if (test__floatuntidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
102        return 1;
103    if (test__floatuntidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
104        return 1;
105    if (test__floatuntidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
106        return 1;
107    if (test__floatuntidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
108        return 1;
109
110    if (test__floatuntidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
111        return 1;
112    if (test__floatuntidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
113        return 1;
114    if (test__floatuntidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
115        return 1;
116    if (test__floatuntidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
117        return 1;
118    if (test__floatuntidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
119        return 1;
120    if (test__floatuntidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
121        return 1;
122    if (test__floatuntidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
123        return 1;
124    if (test__floatuntidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
125        return 1;
126    if (test__floatuntidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
127        return 1;
128    if (test__floatuntidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
129        return 1;
130    if (test__floatuntidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
131        return 1;
132    if (test__floatuntidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
133        return 1;
134    if (test__floatuntidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
135        return 1;
136    if (test__floatuntidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
137        return 1;
138    if (test__floatuntidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
139        return 1;
140
141    if (test__floatuntidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
142        return 1;
143    if (test__floatuntidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
144        return 1;
145    if (test__floatuntidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
146        return 1;
147    if (test__floatuntidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
148        return 1;
149    if (test__floatuntidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
150        return 1;
151    if (test__floatuntidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
152        return 1;
153    if (test__floatuntidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
154        return 1;
155    if (test__floatuntidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
156        return 1;
157    if (test__floatuntidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
158        return 1;
159    if (test__floatuntidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
160        return 1;
161    if (test__floatuntidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
162        return 1;
163    if (test__floatuntidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
164        return 1;
165    if (test__floatuntidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
166        return 1;
167    if (test__floatuntidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
168        return 1;
169    if (test__floatuntidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
170        return 1;
171#else
172    printf("skipped\n");
173#endif
174   return 0;
175}
176