1 //===-- Unittests for log10 -----------------------------------------------===// 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/log10.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 16 #include <stdint.h> 17 18 using LlvmLibcLog10Test = LIBC_NAMESPACE::testing::FPTest<double>; 19 20 TEST_F(LlvmLibcLog10Test, SpecialNumbers) { 21 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log10(aNaN)); 22 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log10(inf)); 23 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log10(neg_inf), FE_INVALID); 24 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log10(0.0), 25 FE_DIVBYZERO); 26 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log10(-0.0), 27 FE_DIVBYZERO); 28 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log10(-1.0), FE_INVALID); 29 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log10(1.0)); 30 31 double x = 1.0; 32 for (int i = 0; i < 11; ++i, x *= 10.0) { 33 EXPECT_FP_EQ_ALL_ROUNDING(static_cast<double>(i), LIBC_NAMESPACE::log10(x)); 34 } 35 } 36 37 #ifdef LIBC_TEST_FTZ_DAZ 38 39 using namespace LIBC_NAMESPACE::testing; 40 41 TEST_F(LlvmLibcLog10Test, FTZMode) { 42 ModifyMXCSR mxcsr(FTZ); 43 44 EXPECT_FP_EQ(-0x1.434e6420f4374p8, LIBC_NAMESPACE::log10(min_denormal)); 45 } 46 47 TEST_F(LlvmLibcLog10Test, DAZMode) { 48 ModifyMXCSR mxcsr(DAZ); 49 50 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(), 51 LIBC_NAMESPACE::log10(min_denormal)); 52 } 53 54 TEST_F(LlvmLibcLog10Test, FTZDAZMode) { 55 ModifyMXCSR mxcsr(FTZ | DAZ); 56 57 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(), 58 LIBC_NAMESPACE::log10(min_denormal)); 59 } 60 61 #endif 62