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