1//===-- Unittests for log1pf ----------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "hdr/math_macros.h"
10#include "src/__support/FPUtil/FPBits.h"
11#include "src/__support/libc_errno.h"
12#include "src/math/log1pf.h"
13#include "test/UnitTest/FPMatcher.h"
14#include "test/UnitTest/Test.h"
15#include "utils/MPFRWrapper/MPFRUtils.h"
16
17#include <stdint.h>
18
19using LlvmLibcLog1pfTest = LIBC_NAMESPACE::testing::FPTest<float>;
20
21namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
22
23TEST_F(LlvmLibcLog1pfTest, SpecialNumbers) {
24 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log1pf(aNaN));
25 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log1pf(inf));
26 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log1pf(neg_inf), FE_INVALID);
27 EXPECT_FP_EQ(zero, LIBC_NAMESPACE::log1pf(0.0f));
28 EXPECT_FP_EQ(neg_zero, LIBC_NAMESPACE::log1pf(-0.0f));
29 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log1pf(-1.0f),
30 FE_DIVBYZERO);
31}
32
33TEST_F(LlvmLibcLog1pfTest, TrickyInputs) {
34 constexpr int N = 27;
35 constexpr uint32_t INPUTS[N] = {
36 0x35c00006U, /*0x1.80000cp-20f*/
37 0x35400003U, /*0x1.800006p-21f*/
38 0x3640000cU, /*0x1.800018p-19f*/
39 0x36c00018U, /*0x1.80003p-18f*/
40 0x3710001bU, /*0x1.200036p-17f*/
41 0x37400030U, /*0x1.80006p-17f*/
42 0x3770004bU, /*0x1.e00096p-17f*/
43 0x3b9315c8U, /*0x1.262b9p-8f*/
44 0x3c6eb7afU, /*0x1.dd6f5ep-7f*/
45 0x3ddbfec3U, /*0x1.b7fd86p-4f*/
46 0x3efd81adU, /*0x1.fb035ap-2f*/
47 0x41078febU, /*0x1.0f1fd6p+3f*/
48 0x4cc1c80bU, /*0x1.839016p+26f*/
49 0x5cd69e88U, /*0x1.ad3d1p+58f*/
50 0x5ee8984eU, /*0x1.d1309cp+62f*/
51 0x65d890d3U, /*0x1.b121a6p+76f*/
52 0x665e7ca6U, /*0x1.bcf94cp+77f*/
53 0x6f31a8ecU, /*0x1.6351d8p+95f*/
54 0x79e7ec37U, /*0x1.cfd86ep+116f*/
55 0x7a17f30aU, /*0x1.2fe614p+117f*/
56 0xb53ffffdU, /*-0x1.7ffffap-21f*/
57 0xb70fffe5U, /*-0x1.1fffcap-17f*/
58 0xbb0ec8c4U, /*-0x1.1d9188p-9f*/
59 0xbc4d092cU, /*-0x1.9a1258p-7f*/
60 0xbc657728U, /*-0x1.caee5p-7f*/
61 0xbd1d20afU, /*-0x1.3a415ep-5f*/
62 0xbf800000U, /*-1.0f*/
63 };
64 for (int i = 0; i < N; ++i) {
65 float x = FPBits(INPUTS[i]).get_val();
66 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Log1p, x,
67 LIBC_NAMESPACE::log1pf(x), 0.5);
68 }
69}
70
71TEST_F(LlvmLibcLog1pfTest, InFloatRange) {
72 constexpr uint32_t COUNT = 100'000;
73 constexpr uint32_t STEP = UINT32_MAX / COUNT;
74 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
75 float x = FPBits(v).get_val();
76 if (FPBits(v).is_nan() || FPBits(v).is_inf())
77 continue;
78 libc_errno = 0;
79 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Log1p, x,
80 LIBC_NAMESPACE::log1pf(x), 0.5);
81 }
82}
83

source code of libc/test/src/math/log1pf_test.cpp