remquol_test.cpp
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
//===-- Unittests for remquol ---------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "include/math.h"
#include "src/math/remquol.h"
#include "utils/FPUtil/BasicOperations.h"
#include "utils/FPUtil/FPBits.h"
#include "utils/FPUtil/TestHelpers.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
#include "utils/UnitTest/Test.h"
using FPBits = __llvm_libc::fputil::FPBits<long double>;
using UIntType = FPBits::UIntType;
namespace mpfr = __llvm_libc::testing::mpfr;
static const long double zero = FPBits::zero();
static const long double negZero = FPBits::negZero();
static const long double nan = FPBits::buildNaN(1);
static const long double inf = FPBits::inf();
static const long double negInf = FPBits::negInf();
TEST(RemquoTest, SpecialNumbers) {
int exponent;
long double x, y;
y = 1.0l;
x = inf;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
x = negInf;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
x = 1.0l;
y = zero;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
y = negZero;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
y = nan;
x = 1.0l;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
y = 1.0l;
x = nan;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
x = nan;
y = nan;
EXPECT_NE(isnan(__llvm_libc::remquol(x, y, &exponent)), 0);
x = zero;
y = 1.0l;
EXPECT_FP_EQ(__llvm_libc::remquol(x, y, &exponent), zero);
x = negZero;
y = 1.0l;
EXPECT_FP_EQ(__llvm_libc::remquol(x, y, &exponent), negZero);
}
TEST(RemquofTest, SubnormalRange) {
constexpr UIntType count = 1000001;
constexpr UIntType step =
(FPBits::maxSubnormal - FPBits::minSubnormal) / count;
for (UIntType v = FPBits::minSubnormal, w = FPBits::maxSubnormal;
v <= FPBits::maxSubnormal && w >= FPBits::minSubnormal;
v += step, w -= step) {
long double x = FPBits(v), y = FPBits(w);
mpfr::BinaryOutput<long double> result;
mpfr::BinaryInput<long double> input{x, y};
result.f = __llvm_libc::remquol(x, y, &result.i);
ASSERT_MPFR_MATCH(mpfr::Operation::RemQuo, input, result, 0.0);
}
}
TEST(RemquofTest, NormalRange) {
constexpr UIntType count = 1000001;
constexpr UIntType step = (FPBits::maxNormal - FPBits::minNormal) / count;
for (UIntType v = FPBits::minNormal, w = FPBits::maxNormal;
v <= FPBits::maxNormal && w >= FPBits::minNormal; v += step, w -= step) {
long double x = FPBits(v), y = FPBits(w);
mpfr::BinaryOutput<long double> result;
result.f = __llvm_libc::remquol(x, y, &result.i);
// In normal range on x86 platforms, the implicit 1 bit can be zero making
// the numbers NaN. Hence we test for them separately.
if (isnan(x) || isnan(y)) {
ASSERT_NE(isnan(result.f), 0);
} else {
mpfr::BinaryInput<long double> input{x, y};
ASSERT_MPFR_MATCH(mpfr::Operation::RemQuo, input, result, 0.0);
}
}
}