1// RUN: %clang_builtins %s %librt -o %t && %run %t
2// REQUIRES: int128
3//===-- floattidf.c - Test __floattidf ------------------------------------===//
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 __floattidf 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//             ti_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 __floattidf(ti_int a);
29
30int test__floattidf(ti_int a, double expected)
31{
32    double x = __floattidf(a);
33    if (x != expected)
34    {
35        twords at;
36        at.all = a;
37        printf("error in __floattidf(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__floattidf(0, 0.0))
53        return 1;
54
55    if (test__floattidf(1, 1.0))
56        return 1;
57    if (test__floattidf(2, 2.0))
58        return 1;
59    if (test__floattidf(20, 20.0))
60        return 1;
61    if (test__floattidf(-1, -1.0))
62        return 1;
63    if (test__floattidf(-2, -2.0))
64        return 1;
65    if (test__floattidf(-20, -20.0))
66        return 1;
67
68    if (test__floattidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
69        return 1;
70    if (test__floattidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
71        return 1;
72    if (test__floattidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
73        return 1;
74    if (test__floattidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
75        return 1;
76
77    if (test__floattidf(make_ti(0x8000008000000000LL, 0), -0x1.FFFFFEp+126))
78        return 1;
79    if (test__floattidf(make_ti(0x8000000000000800LL, 0), -0x1.FFFFFFFFFFFFEp+126))
80        return 1;
81    if (test__floattidf(make_ti(0x8000010000000000LL, 0), -0x1.FFFFFCp+126))
82        return 1;
83    if (test__floattidf(make_ti(0x8000000000001000LL, 0), -0x1.FFFFFFFFFFFFCp+126))
84        return 1;
85
86    if (test__floattidf(make_ti(0x8000000000000000LL, 0), -0x1.000000p+127))
87        return 1;
88    if (test__floattidf(make_ti(0x8000000000000001LL, 0), -0x1.000000p+127))
89        return 1;
90
91    if (test__floattidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
92        return 1;
93
94    if (test__floattidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
95        return 1;
96    if (test__floattidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
97        return 1;
98    if (test__floattidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
99        return 1;
100    if (test__floattidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
101        return 1;
102    if (test__floattidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
103        return 1;
104
105    if (test__floattidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
106        return 1;
107    if (test__floattidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
108        return 1;
109    if (test__floattidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
110        return 1;
111    if (test__floattidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
112        return 1;
113    if (test__floattidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
114        return 1;
115
116    if (test__floattidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
117        return 1;
118    if (test__floattidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
119        return 1;
120    if (test__floattidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
121        return 1;
122    if (test__floattidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
123        return 1;
124    if (test__floattidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
125        return 1;
126    if (test__floattidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
127        return 1;
128    if (test__floattidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
129        return 1;
130    if (test__floattidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
131        return 1;
132    if (test__floattidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
133        return 1;
134    if (test__floattidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
135        return 1;
136    if (test__floattidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
137        return 1;
138    if (test__floattidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
139        return 1;
140    if (test__floattidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
141        return 1;
142    if (test__floattidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
143        return 1;
144    if (test__floattidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
145        return 1;
146
147    if (test__floattidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
148        return 1;
149    if (test__floattidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
150        return 1;
151    if (test__floattidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
152        return 1;
153    if (test__floattidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
154        return 1;
155    if (test__floattidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
156        return 1;
157    if (test__floattidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
158        return 1;
159    if (test__floattidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
160        return 1;
161    if (test__floattidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
162        return 1;
163    if (test__floattidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
164        return 1;
165    if (test__floattidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
166        return 1;
167    if (test__floattidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
168        return 1;
169    if (test__floattidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
170        return 1;
171    if (test__floattidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
172        return 1;
173    if (test__floattidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
174        return 1;
175    if (test__floattidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
176        return 1;
177#else
178    printf("skipped\n");
179#endif
180   return 0;
181}
182