1 //===-- Unittests for log -------------------------------------------------===// 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/log.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 16 #include <stdint.h> 17 18 using LlvmLibcLogTest = LIBC_NAMESPACE::testing::FPTest<double>; 19 20 TEST_F(LlvmLibcLogTest, SpecialNumbers) { 21 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::log(aNaN)); 22 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::log(inf)); 23 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log(neg_inf), FE_INVALID); 24 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log(0.0), FE_DIVBYZERO); 25 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::log(-0.0), FE_DIVBYZERO); 26 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::log(-1.0), FE_INVALID); 27 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::log(1.0)); 28 } 29 30 #ifdef LIBC_TEST_FTZ_DAZ 31 32 using namespace LIBC_NAMESPACE::testing; 33 34 TEST_F(LlvmLibcLogTest, FTZMode) { 35 ModifyMXCSR mxcsr(FTZ); 36 37 EXPECT_FP_EQ(-0x1.74385446d71c3p9, LIBC_NAMESPACE::log(min_denormal)); 38 } 39 40 TEST_F(LlvmLibcLogTest, DAZMode) { 41 ModifyMXCSR mxcsr(DAZ); 42 43 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(), 44 LIBC_NAMESPACE::log(min_denormal)); 45 } 46 47 TEST_F(LlvmLibcLogTest, FTZDAZMode) { 48 ModifyMXCSR mxcsr(FTZ | DAZ); 49 50 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(), 51 LIBC_NAMESPACE::log(min_denormal)); 52 } 53 54 #endif 55