1 //===-- Unittests for exp -------------------------------------------------===// 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/exp.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 16 #include <stdint.h> 17 18 using LlvmLibcExpTest = LIBC_NAMESPACE::testing::FPTest<double>; 19 20 TEST_F(LlvmLibcExpTest, SpecialNumbers) { 21 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp(aNaN)); 22 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp(inf)); 23 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp(neg_inf)); 24 EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp(-0x1.0p20), 25 FE_UNDERFLOW); 26 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp(0x1.0p20), FE_OVERFLOW); 27 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp(0.0)); 28 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp(-0.0)); 29 } 30 31 #ifdef LIBC_TEST_FTZ_DAZ 32 33 using namespace LIBC_NAMESPACE::testing; 34 35 TEST_F(LlvmLibcExpTest, FTZMode) { 36 ModifyMXCSR mxcsr(FTZ); 37 38 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal)); 39 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal)); 40 } 41 42 TEST_F(LlvmLibcExpTest, DAZMode) { 43 ModifyMXCSR mxcsr(DAZ); 44 45 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal)); 46 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal)); 47 } 48 49 TEST_F(LlvmLibcExpTest, FTZDAZMode) { 50 ModifyMXCSR mxcsr(FTZ | DAZ); 51 52 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(min_denormal)); 53 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp(max_denormal)); 54 } 55 56 #endif 57