1 //===-- Unittests for 2^x -------------------------------------------------===// 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/exp2.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 16 #include <stdint.h> 17 18 using LlvmLibcExp2Test = LIBC_NAMESPACE::testing::FPTest<double>; 19 20 TEST_F(LlvmLibcExp2Test, SpecialNumbers) { 21 EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::exp2(aNaN)); 22 EXPECT_FP_EQ(inf, LIBC_NAMESPACE::exp2(inf)); 23 EXPECT_FP_EQ_ALL_ROUNDING(zero, LIBC_NAMESPACE::exp2(neg_inf)); 24 EXPECT_FP_EQ_WITH_EXCEPTION(zero, LIBC_NAMESPACE::exp2(-0x1.0p20), 25 FE_UNDERFLOW); 26 EXPECT_FP_EQ_WITH_EXCEPTION(inf, LIBC_NAMESPACE::exp2(0x1.0p20), FE_OVERFLOW); 27 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp2(0.0)); 28 EXPECT_FP_EQ_ALL_ROUNDING(1.0, LIBC_NAMESPACE::exp2(-0.0)); 29 EXPECT_FP_EQ_ALL_ROUNDING(2.0, LIBC_NAMESPACE::exp2(1.0)); 30 EXPECT_FP_EQ_ALL_ROUNDING(0.5, LIBC_NAMESPACE::exp2(-1.0)); 31 EXPECT_FP_EQ_ALL_ROUNDING(4.0, LIBC_NAMESPACE::exp2(2.0)); 32 EXPECT_FP_EQ_ALL_ROUNDING(0.25, LIBC_NAMESPACE::exp2(-2.0)); 33 } 34 35 #ifdef LIBC_TEST_FTZ_DAZ 36 37 using namespace LIBC_NAMESPACE::testing; 38 39 TEST_F(LlvmLibcExp2Test, FTZMode) { 40 ModifyMXCSR mxcsr(FTZ); 41 42 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal)); 43 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal)); 44 } 45 46 TEST_F(LlvmLibcExp2Test, DAZMode) { 47 ModifyMXCSR mxcsr(DAZ); 48 49 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal)); 50 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal)); 51 } 52 53 TEST_F(LlvmLibcExp2Test, FTZDAZMode) { 54 ModifyMXCSR mxcsr(FTZ | DAZ); 55 56 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(min_denormal)); 57 EXPECT_FP_EQ(1.0, LIBC_NAMESPACE::exp2(max_denormal)); 58 } 59 60 #endif 61