1 //===-- Unittests for log10f ----------------------------------------------===//
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/math/log10f.h"
12 #include "test/UnitTest/FPMatcher.h"
13 #include "test/UnitTest/Test.h"
14 #include "utils/MPFRWrapper/MPFRUtils.h"
15
16 #include <errno.h>
17 #include <stdint.h>
18
19 using LlvmLibcLog10fTest = LIBC_NAMESPACE::testing::FPTest<float>;
20
21 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
22
TEST_F(LlvmLibcLog10fTest,SpecialNumbers)23 TEST_F(LlvmLibcLog10fTest, SpecialNumbers) {
24 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log10f(aNaN));
25 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log10f(inf));
26 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log10f(neg_inf), FE_INVALID);
27 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log10f(0.0f),
28 FE_DIVBYZERO);
29 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log10f(-0.0f),
30 FE_DIVBYZERO);
31 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log10f(-1.0f), FE_INVALID);
32 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log10f(1.0f));
33 }
34
TEST_F(LlvmLibcLog10fTest,TrickyInputs)35 TEST_F(LlvmLibcLog10fTest, TrickyInputs) {
36 constexpr int N = 21;
37 constexpr uint32_t INPUTS[N] = {
38 0x3f800000U /*1.0f*/,
39 0x41200000U /*10.0f*/,
40 0x42c80000U /*100.0f*/,
41 0x447a0000U /*1,000.0f*/,
42 0x461c4000U /*10,000.0f*/,
43 0x47c35000U /*100,000.0f*/,
44 0x49742400U /*1,000,000.0f*/,
45 0x4b189680U /*10,000,000.0f*/,
46 0x4cbebc20U /*100,000,000.0f*/,
47 0x4e6e6b28U /*1,000,000,000.0f*/,
48 0x501502f9U /*10,000,000,000.0f*/,
49 0x4f134f83U /*2471461632.0f*/,
50 0x7956ba5eU /*69683218960000541503257137270226944.0f*/,
51 0x08ae'a356U /*0x1.5d46acp-110f*/,
52 0x1c7d'a337U /*0x1.fb466ep-71f*/,
53 0x69c8'c583U /*0x1.918b06p+84f*/,
54 0x0efe'ee7aU /*0x1.fddcf4p-98f*/,
55 0x3f5f'de1bU /*0x1.bfbc36p-1f*/,
56 0x3f80'70d8U /*0x1.00e1bp0f*/,
57 0x120b'93dcU /*0x1.1727b8p-91f*/,
58 0x13ae'78d3U /*0x1.5cf1a6p-88f*/,
59 };
60
61 for (int i = 0; i < N; ++i) {
62 float x = FPBits(INPUTS[i]).get_val();
63 EXPECT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Log10, x,
64 LIBC_NAMESPACE::log10f(x), 0.5);
65 }
66 }
67
TEST_F(LlvmLibcLog10fTest,InFloatRange)68 TEST_F(LlvmLibcLog10fTest, InFloatRange) {
69 constexpr uint32_t COUNT = 100'000;
70 constexpr uint32_t STEP = UINT32_MAX / COUNT;
71 for (uint32_t i = 0, v = 0; i <= COUNT; ++i, v += STEP) {
72 float x = FPBits(v).get_val();
73 ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Log10, x,
74 LIBC_NAMESPACE::log10f(x), 0.5);
75 }
76 }
77