1 //===-- Unittests for exp2f -----------------------------------------------===// 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/exp2f.h" 13 #include "test/UnitTest/FPMatcher.h" 14 #include "test/UnitTest/Test.h" 15 16 #include <stdint.h> 17 18 using LlvmLibcExp2fTest = LIBC_NAMESPACE::testing::FPTest<float>; 19 20 TEST_F(LlvmLibcExp2fTest, SpecialNumbers) { 21 LIBC_NAMESPACE::libc_errno = 0; 22 23 EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::exp2f(aNaN)); 24 EXPECT_MATH_ERRNO(0); 25 26 EXPECT_FP_EQ_ALL_ROUNDING(inf, LIBC_NAMESPACE::exp2f(inf)); 27 EXPECT_MATH_ERRNO(0); 28 29 EXPECT_FP_EQ_ALL_ROUNDING(0.0f, LIBC_NAMESPACE::exp2f(neg_inf)); 30 EXPECT_MATH_ERRNO(0); 31 32 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2f(0.0f)); 33 EXPECT_MATH_ERRNO(0); 34 35 EXPECT_FP_EQ_ALL_ROUNDING(1.0f, LIBC_NAMESPACE::exp2f(-0.0f)); 36 EXPECT_MATH_ERRNO(0); 37 38 EXPECT_FP_EQ_ALL_ROUNDING(2.0f, LIBC_NAMESPACE::exp2f(1.0f)); 39 EXPECT_FP_EQ_ALL_ROUNDING(0.5f, LIBC_NAMESPACE::exp2f(-1.0f)); 40 EXPECT_FP_EQ_ALL_ROUNDING(4.0f, LIBC_NAMESPACE::exp2f(2.0f)); 41 EXPECT_FP_EQ_ALL_ROUNDING(0.25f, LIBC_NAMESPACE::exp2f(-2.0f)); 42 } 43 44 TEST_F(LlvmLibcExp2fTest, Overflow) { 45 LIBC_NAMESPACE::libc_errno = 0; 46 EXPECT_FP_EQ_WITH_EXCEPTION( 47 inf, LIBC_NAMESPACE::exp2f(FPBits(0x7f7fffffU).get_val()), FE_OVERFLOW); 48 EXPECT_MATH_ERRNO(ERANGE); 49 50 EXPECT_FP_EQ_WITH_EXCEPTION( 51 inf, LIBC_NAMESPACE::exp2f(FPBits(0x43000000U).get_val()), FE_OVERFLOW); 52 EXPECT_MATH_ERRNO(ERANGE); 53 54 EXPECT_FP_EQ_WITH_EXCEPTION( 55 inf, LIBC_NAMESPACE::exp2f(FPBits(0x43000001U).get_val()), FE_OVERFLOW); 56 EXPECT_MATH_ERRNO(ERANGE); 57 } 58 59 #ifdef LIBC_TEST_FTZ_DAZ 60 61 using namespace LIBC_NAMESPACE::testing; 62 63 TEST_F(LlvmLibcExp2fTest, FTZMode) { 64 ModifyMXCSR mxcsr(FTZ); 65 66 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(min_denormal)); 67 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(max_denormal)); 68 } 69 70 TEST_F(LlvmLibcExp2fTest, DAZMode) { 71 ModifyMXCSR mxcsr(DAZ); 72 73 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(min_denormal)); 74 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(max_denormal)); 75 } 76 77 TEST_F(LlvmLibcExp2fTest, FTZDAZMode) { 78 ModifyMXCSR mxcsr(FTZ | DAZ); 79 80 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(min_denormal)); 81 EXPECT_FP_EQ(1.0f, LIBC_NAMESPACE::exp2f(max_denormal)); 82 } 83 84 #endif 85