subtf3_test.c
3.14 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
// RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_subtf3
//===--------------- subtf3_test.c - Test __subtf3 ------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file tests __subtf3 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include <fenv.h>
#include <stdio.h>
#if __LDBL_MANT_DIG__ == 113
#include "int_lib.h"
#include "fp_test.h"
// Returns: a - b
COMPILER_RT_ABI long double __subtf3(long double a, long double b);
int test__subtf3(long double a, long double b,
uint64_t expectedHi, uint64_t expectedLo)
{
long double x = __subtf3(a, b);
int ret = compareResultLD(x, expectedHi, expectedLo);
if (ret){
printf("error in test__subtf3(%.20Lf, %.20Lf) = %.20Lf, "
"expected %.20Lf\n", a, b, x,
fromRep128(expectedHi, expectedLo));
}
return ret;
}
char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
#endif
int main()
{
#if __LDBL_MANT_DIG__ == 113
// qNaN - any = qNaN
if (test__subtf3(makeQNaN128(),
0x1.23456789abcdefp+5L,
UINT64_C(0x7fff800000000000),
UINT64_C(0x0)))
return 1;
// NaN - any = NaN
if (test__subtf3(makeNaN128(UINT64_C(0x800030000000)),
0x1.23456789abcdefp+5L,
UINT64_C(0x7fff800000000000),
UINT64_C(0x0)))
return 1;
// inf - any = inf
if (test__subtf3(makeInf128(),
0x1.23456789abcdefp+5L,
UINT64_C(0x7fff000000000000),
UINT64_C(0x0)))
return 1;
// any - any
if (test__subtf3(0x1.234567829a3bcdef5678ade36734p+5L,
0x1.ee9d7c52354a6936ab8d7654321fp-1L,
UINT64_C(0x40041b8af1915166),
UINT64_C(0xa44a7bca780a166c)))
return 1;
#if (defined(__arm__) || defined(__aarch64__)) && defined(__ARM_FP) || \
defined(i386) || defined(__x86_64__)
// Rounding mode tests on supported architectures
const long double m = 1234.02L, n = 0.01L;
fesetround(FE_UPWARD);
if (test__subtf3(m, n,
UINT64_C(0x40093480a3d70a3d),
UINT64_C(0x70a3d70a3d70a3d7)))
return 1;
fesetround(FE_DOWNWARD);
if (test__subtf3(m, n,
UINT64_C(0x40093480a3d70a3d),
UINT64_C(0x70a3d70a3d70a3d6)))
return 1;
fesetround(FE_TOWARDZERO);
if (test__subtf3(m, n,
UINT64_C(0x40093480a3d70a3d),
UINT64_C(0x70a3d70a3d70a3d6)))
return 1;
fesetround(FE_TONEAREST);
if (test__subtf3(m, n,
UINT64_C(0x40093480a3d70a3d),
UINT64_C(0x70a3d70a3d70a3d7)))
return 1;
#endif
#else
printf("skipped\n");
#endif
return 0;
}