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/errno/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 <errno.h>
18#include <stdint.h>
19
20using LlvmLibcLog1pfTest = LIBC_NAMESPACE::testing::FPTest<float>;
21
22namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
23
24TEST_F(LlvmLibcLog1pfTest, SpecialNumbers) {
25 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log1pf(aNaN));
26 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log1pf(inf));
27 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log1pf(neg_inf), FE_INVALID);
28 EXPECT_FP_EQ(zero, LIBC_NAMESPACE::log1pf(0.0f));
29 EXPECT_FP_EQ(neg_zero, LIBC_NAMESPACE::log1pf(-0.0f));
30 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log1pf(-1.0f),
31 FE_DIVBYZERO);
32}
33
34TEST_F(LlvmLibcLog1pfTest, TrickyInputs) {
35 constexpr int N = 27;
36 constexpr uint32_t INPUTS[N] = {
37 0x35c00006U, /*0x1.80000cp-20f*/
38 0x35400003U, /*0x1.800006p-21f*/
39 0x3640000cU, /*0x1.800018p-19f*/
40 0x36c00018U, /*0x1.80003p-18f*/
41 0x3710001bU, /*0x1.200036p-17f*/
42 0x37400030U, /*0x1.80006p-17f*/
43 0x3770004bU, /*0x1.e00096p-17f*/
44 0x3b9315c8U, /*0x1.262b9p-8f*/
45 0x3c6eb7afU, /*0x1.dd6f5ep-7f*/
46 0x3ddbfec3U, /*0x1.b7fd86p-4f*/
47 0x3efd81adU, /*0x1.fb035ap-2f*/
48 0x41078febU, /*0x1.0f1fd6p+3f*/
49 0x4cc1c80bU, /*0x1.839016p+26f*/
50 0x5cd69e88U, /*0x1.ad3d1p+58f*/
51 0x5ee8984eU, /*0x1.d1309cp+62f*/
52 0x65d890d3U, /*0x1.b121a6p+76f*/
53 0x665e7ca6U, /*0x1.bcf94cp+77f*/
54 0x6f31a8ecU, /*0x1.6351d8p+95f*/
55 0x79e7ec37U, /*0x1.cfd86ep+116f*/
56 0x7a17f30aU, /*0x1.2fe614p+117f*/
57 0xb53ffffdU, /*-0x1.7ffffap-21f*/
58 0xb70fffe5U, /*-0x1.1fffcap-17f*/
59 0xbb0ec8c4U, /*-0x1.1d9188p-9f*/
60 0xbc4d092cU, /*-0x1.9a1258p-7f*/
61 0xbc657728U, /*-0x1.caee5p-7f*/
62 0xbd1d20afU, /*-0x1.3a415ep-5f*/
63 0xbf800000U, /*-1.0f*/
64 };
65 for (int i = 0; i < N; ++i) {
66 float x = FPBits(INPUTS[i]).get_val();
67 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Log1p, x,
68 LIBC_NAMESPACE::log1pf(x), 0.5);
69 }
70}
71
72TEST_F(LlvmLibcLog1pfTest, InFloatRange) {
73 constexpr uint32_t COUNT = 100'000;
74 constexpr uint32_t STEP = UINT32_MAX / COUNT;
75 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
76 float x = FPBits(v).get_val();
77 if (isnan(x: x) || isinf(x: x))
78 continue;
79 LIBC_NAMESPACE::libc_errno = 0;
80 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Log1p, x,
81 LIBC_NAMESPACE::log1pf(x), 0.5);
82 }
83}
84

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