1 //===-- Unittests for logf-----------------------------------------------===// 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/logf.h" 12 #include "test/UnitTest/FPMatcher.h" 13 #include "test/UnitTest/Test.h" 14 15 #include <stdint.h> 16 17 using LlvmLibcLogfTest = LIBC_NAMESPACE::testing::FPTest<float>; 18 19 TEST_F(LlvmLibcLogfTest, SpecialNumbers) { 20 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::logf(aNaN)); 21 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::logf(inf)); 22 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::logf(neg_inf), FE_INVALID); 23 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::logf(0.0f), 24 FE_DIVBYZERO); 25 EXPECT_FP_EQ_WITH_EXCEPTION(neg_inf, LIBC_NAMESPACE::logf(-0.0f), 26 FE_DIVBYZERO); 27 EXPECT_FP_IS_NAN_WITH_EXCEPTION(LIBC_NAMESPACE::logf(-1.0f), FE_INVALID); 28 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::logf(1.0f)); 29 } 30 #ifdef LIBC_TEST_FTZ_DAZ 31 32 using namespace LIBC_NAMESPACE::testing; 33 34 TEST_F(LlvmLibcLogfTest, FTZMode) { 35 ModifyMXCSR mxcsr(FTZ); 36 37 EXPECT_FP_EQ(-0x1.9d1d9fccf477p6f, LIBC_NAMESPACE::logf(min_denormal)); 38 } 39 40 TEST_F(LlvmLibcLogfTest, DAZMode) { 41 ModifyMXCSR mxcsr(DAZ); 42 43 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(), 44 LIBC_NAMESPACE::logf(min_denormal)); 45 } 46 47 TEST_F(LlvmLibcLogfTest, FTZDAZMode) { 48 ModifyMXCSR mxcsr(FTZ | DAZ); 49 50 EXPECT_FP_EQ(FPBits::inf(Sign::NEG).get_val(), 51 LIBC_NAMESPACE::logf(min_denormal)); 52 } 53 54 #endif 55