1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatunditf
3 //===-- floatunditf_test.c - Test __floatunditf ---------------------------===//
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 __floatunditf for the compiler_rt library.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "int_lib.h"
16 #include <math.h>
17 #include <complex.h>
18 #include <stdio.h>
19 
20 #if __LDBL_MANT_DIG__ == 113
21 
22 #include "fp_test.h"
23 
24 // Returns: long integer converted to long double
25 
26 COMPILER_RT_ABI long double __floatunditf(unsigned long long a);
27 
28 int test__floatunditf(unsigned long long a, uint64_t expectedHi, uint64_t expectedLo)
29 {
30     long double x = __floatunditf(a);
31     int ret = compareResultLD(x, expectedHi, expectedLo);
32 
33     if (ret)
34         printf("error in __floatunditf(%Lu) = %.20Lf, "
35                "expected %.20Lf\n", a, x, fromRep128(expectedHi, expectedLo));
36     return ret;
37 }
38 
39 char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
40 
41 #endif
42 
43 int main()
44 {
45 #if __LDBL_MANT_DIG__ == 113
46     if (test__floatunditf(0xffffffffffffffffULL, UINT64_C(0x403effffffffffff), UINT64_C(0xfffe000000000000)))
47         return 1;
48     if (test__floatunditf(0xfffffffffffffffeULL, UINT64_C(0x403effffffffffff), UINT64_C(0xfffc000000000000)))
49         return 1;
50     if (test__floatunditf(0x8000000000000000ULL, UINT64_C(0x403e000000000000), UINT64_C(0x0)))
51         return 1;
52     if (test__floatunditf(0x7fffffffffffffffULL, UINT64_C(0x403dffffffffffff), UINT64_C(0xfffc000000000000)))
53         return 1;
54     if (test__floatunditf(0x123456789abcdef1ULL, UINT64_C(0x403b23456789abcd), UINT64_C(0xef10000000000000)))
55         return 1;
56     if (test__floatunditf(0x2ULL, UINT64_C(0x4000000000000000), UINT64_C(0x0)))
57         return 1;
58     if (test__floatunditf(0x1ULL, UINT64_C(0x3fff000000000000), UINT64_C(0x0)))
59         return 1;
60     if (test__floatunditf(0x0ULL, UINT64_C(0x0), UINT64_C(0x0)))
61         return 1;
62 
63 #else
64     printf("skipped\n");
65 
66 #endif
67     return 0;
68 }
69